Selector: Inline Sizzle into the selector module: 3.x version (#5113)

This commit removes Sizzle from jQuery, inlining its code & removing obsolete workarounds where applicable. The Sizzle AUTHORS.txt file has been merged with the jQuery one - people are sorted by their first contributions to either of the two repositories. The main `selector` module can be disabled in favor of `selector-native` via: grunt custom:-selector For backwards compatibility, the legacy `sizzle` alias is also supported (it will be dropped in jQuery `4.0.0`): grunt custom:-selector Sizzle tests have been ported to jQuery ones. Ones that are not compatible with the `selector-native` module are disabled if the regular selector module is excluded. Backwards compatibility is still kept for all `Sizzle` utils - they continue to be available under `jQuery.find` - but the primary implementation is now attached directly to jQuery. Some selector utils shared by `selector` & `selector-native` have been extracted & deduplicated. `jQuery.text` and `jQuery.isXMLDoc` have been moved to the `core` module. The commit reduces the gzipped jQuery size by 851 bytes compared to the `3.x-stable` branch. Closes gh-5113 Ref gh-4395 Ref gh-4406
2024-11-23 02:54:22 +00:00 · 2022-12-14 01:41:31 +01:00 · 2022-12-14 01:41:31 +01:00 · 6306ca4994
commit 6306ca4994
parent 96675fa7c8
43 changed files with 5058 additions and 3312 deletions
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@ -28,9 +28,9 @@ jobs:
            NODE_VERSION: "16.x"
            NPM_SCRIPT: "test:no-deprecated"
            BROWSERS: "ChromeHeadless"
-          - NAME: "Browser tests: no-Sizzle build, Chrome stable"
+          - NAME: "Browser tests: selector-native build, Chrome stable"
            NODE_VERSION: "16.x"
-            NPM_SCRIPT: "test:no-sizzle"
+            NPM_SCRIPT: "test:selector-native"
            BROWSERS: "ChromeHeadless"
          - NAME: "Browser tests: AMD build, Chrome stable"
            NODE_VERSION: "16.x"
--- a/AUTHORS.txt
+++ b/AUTHORS.txt
@ -18,16 +18,24 @@ David Serduke <davidserduke@gmail.com>
 Richard D. Worth <rdworth@gmail.com>
 Scott González <scott.gonzalez@gmail.com>
 Ariel Flesler <aflesler@gmail.com>
+Cheah Chu Yeow <chuyeow@gmail.com>
+Andrew Chalkley <andrew@chalkley.org>
+Fabio Buffoni <fabio.buffoni@bitmaster.it>
+Stefan Bauckmeier  <stefan@bauckmeier.de>
 Jon Evans <jon@springyweb.com>
 TJ Holowaychuk <tj@vision-media.ca>
+Riccardo De Agostini <rdeago@gmail.com>
 Michael Bensoussan <mickey@seesmic.com>
-Robert Katić <robert.katic@gmail.com>
 Louis-Rémi Babé <lrbabe@gmail.com>
-Earle Castledine <mrspeaker@gmail.com>
+Robert Katić <robert.katic@gmail.com>
 Damian Janowski <damian.janowski@gmail.com>
+Anton Kovalyov <anton@kovalyov.net>
+Dušan B. Jovanovic <dbjdbj@gmail.com>
+Earle Castledine <mrspeaker@gmail.com>
 Rich Dougherty <rich@rd.gen.nz>
 Kim Dalsgaard <kim@kimdalsgaard.com>
 Andrea Giammarchi <andrea.giammarchi@gmail.com>
+Fabian Jakobs <fabian.jakobs@web.de>
 Mark Gibson <jollytoad@gmail.com>
 Karl Swedberg <kswedberg@gmail.com>
 Justin Meyer <justinbmeyer@gmail.com>
@ -35,9 +43,10 @@ Ben Alman <cowboy@rj3.net>
 James Padolsey <cla@padolsey.net>
 David Petersen <public@petersendidit.com>
 Batiste Bieler <batiste.bieler@gmail.com>
+Jake Archibald <jake.archibald@bbc.co.uk>
 Alexander Farkas <info@corrupt-system.de>
-Rick Waldron <waldron.rick@gmail.com>
 Filipe Fortes <filipe@fortes.com>
+Rick Waldron <waldron.rick@gmail.com>
 Neeraj Singh <neerajdotname@gmail.com>
 Paul Irish <paul.irish@gmail.com>
 Iraê Carvalho <irae@irae.pro.br>
@ -45,23 +54,24 @@ Matt Curry <matt@pseudocoder.com>
 Michael Monteleone <michael@michaelmonteleone.net>
 Noah Sloan <noah.sloan@gmail.com>
 Tom Viner <github@viner.tv>
+J. Ryan Stinnett <jryans@gmail.com>
 Douglas Neiner <doug@dougneiner.com>
 Adam J. Sontag <ajpiano@ajpiano.com>
+Heungsub Lee <h@subl.ee>
 Dave Reed <dareed@microsoft.com>
-Ralph Whitbeck <ralph.whitbeck@gmail.com>
 Carl Fürstenberg <azatoth@gmail.com>
 Jacob Wright <jacwright@gmail.com>
-J. Ryan Stinnett <jryans@gmail.com>
+Ralph Whitbeck <ralph.whitbeck@gmail.com>
 unknown <Igen005@.upcorp.ad.uprr.com>
 temp01 <temp01irc@gmail.com>
-Heungsub Lee <h@subl.ee>
 Colin Snover <github.com@zetafleet.com>
+Jared Grippe <jared@deadlyicon.com>
 Ryan W Tenney <ryan@10e.us>
+Alex Sexton <AlexSexton@gmail.com>
 Pinhook <contact@pinhooklabs.com>
 Ron Otten <r.j.g.otten@gmail.com>
 Jephte Clain <Jephte.Clain@univ-reunion.fr>
 Anton Matzneller <obhvsbypqghgc@gmail.com>
-Alex Sexton <AlexSexton@gmail.com>
 Dan Heberden <danheberden@gmail.com>
 Henri Wiechers <hwiechers@gmail.com>
 Russell Holbrook <russell.holbrook@patch.com>
@ -71,21 +81,19 @@ Scott Jehl <scottjehl@gmail.com>
 James Burke <jrburke@gmail.com>
 Jonas Pfenniger <jonas@pfenniger.name>
 Xavi Ramirez <xavi.rmz@gmail.com>
-Jared Grippe <jared@deadlyicon.com>
 Sylvester Keil <sylvester@keil.or.at>
 Brandon Sterne <bsterne@mozilla.com>
 Mathias Bynens <mathias@qiwi.be>
+Lee Carpenter <elcarpie@gmail.com>
 Timmy Willison <4timmywil@gmail.com>
 Corey Frang <gnarf37@gmail.com>
 Digitalxero <digitalxero>
-Anton Kovalyov <anton@kovalyov.net>
 David Murdoch <david@davidmurdoch.com>
 Josh Varner <josh.varner@gmail.com>
 Charles McNulty <cmcnulty@kznf.com>
 Jordan Boesch <jboesch26@gmail.com>
 Jess Thrysoee <jess@thrysoee.dk>
 Michael Murray <m@murz.net>
-Lee Carpenter <elcarpie@gmail.com>
 Alexis Abril <me@alexisabril.com>
 Rob Morgan <robbym@gmail.com>
 John Firebaugh <john_firebaugh@bigfix.com>
@ -105,12 +113,13 @@ Timo Tijhof <krinklemail@gmail.com>
 Steen Nielsen <swinedk@gmail.com>
 Anton Ryzhov <anton@ryzhov.me>
 Shi Chuan <shichuanr@gmail.com>
+Matt Mueller <mattmuelle@gmail.com>
 Berker Peksag <berker.peksag@gmail.com>
 Toby Brain <tobyb@freshview.com>
-Matt Mueller <mattmuelle@gmail.com>
 Justin <drakefjustin@gmail.com>
 Daniel Herman <daniel.c.herman@gmail.com>
 Oleg Gaidarenko <markelog@gmail.com>
+Rock Hymas <rock@fogcreek.com>
 Richard Gibson <richard.gibson@gmail.com>
 Rafaël Blais Masson <rafbmasson@gmail.com>
 cmc3cn <59194618@qq.com>
@ -122,6 +131,7 @@ Andrew E Monat <amonat@gmail.com>
 Oskari <admin@o-programs.com>
 Joao Henrique de Andrade Bruni <joaohbruni@yahoo.com.br>
 tsinha <tsinha@Anthonys-MacBook-Pro.local>
+Dominik D. Geyer <dominik.geyer@gmail.com>
 Matt Farmer <matt@frmr.me>
 Trey Hunner <treyhunner@gmail.com>
 Jason Moon <jmoon@socialcast.com>
@ -130,164 +140,180 @@ Kris Borchers <kris.borchers@gmail.com>
 Vladimir Zhuravlev <private.face@gmail.com>
 Jacob Thornton <jacobthornton@gmail.com>
 Chad Killingsworth <chadkillingsworth@missouristate.edu>
+Vitya Muhachev <vic99999@yandex.ru>
 Nowres Rafid <nowres.rafed@gmail.com>
 David Benjamin <davidben@mit.edu>
+Alan Plum <github@ap.apsq.de>
 Uri Gilad <antishok@gmail.com>
 Chris Faulkner <thefaulkner@gmail.com>
+Marcel Greter <marcel.greter@ocbnet.ch>
 Elijah Manor <elijah.manor@gmail.com>
 Daniel Chatfield <chatfielddaniel@gmail.com>
+Daniel Gálvez <dgalvez@editablething.com>
 Nikita Govorov <nikita.govorov@gmail.com>
 Wesley Walser <waw325@gmail.com>
 Mike Pennisi <mike@mikepennisi.com>
+Matthias Jäggli <matthias.jaeggli@gmail.com>
+Devin Cooper <cooper.semantics@gmail.com>
 Markus Staab <markus.staab@redaxo.de>
 Dave Riddle <david@joyvuu.com>
 Callum Macrae <callum@lynxphp.com>
+Jonathan Sampson <jjdsampson@gmail.com>
 Benjamin Truyman <bentruyman@gmail.com>
+Jay Merrifield <fracmak@gmail.com>
 James Huston <james@jameshuston.net>
+Sai Lung Wong <sai.wong@huffingtonpost.com>
 Erick Ruiz de Chávez <erickrdch@gmail.com>
 David Bonner <dbonner@cogolabs.com>
+Allen J Schmidt Jr <cobrasoft@gmail.com>
 Akintayo Akinwunmi <aakinwunmi@judge.com>
 MORGAN <morgan@morgangraphics.com>
 Ismail Khair <ismail.khair@gmail.com>
 Carl Danley <carldanley@gmail.com>
 Mike Petrovich <michael.c.petrovich@gmail.com>
 Greg Lavallee <greglavallee@wapolabs.com>
-Daniel Gálvez <dgalvez@editablething.com>
-Sai Lung Wong <sai.wong@huffingtonpost.com>
 Tom H Fuertes <TomFuertes@gmail.com>
 Roland Eckl <eckl.roland@googlemail.com>
-Jay Merrifield <fracmak@gmail.com>
-Allen J Schmidt Jr <cobrasoft@gmail.com>
-Jonathan Sampson <jjdsampson@gmail.com>
-Marcel Greter <marcel.greter@ocbnet.ch>
-Matthias Jäggli <matthias.jaeggli@gmail.com>
-David Fox <dfoxinator@gmail.com>
 Yiming He <yiminghe@gmail.com>
-Devin Cooper <cooper.semantics@gmail.com>
+David Fox <dfoxinator@gmail.com>
+Bennett Sorbo <bsorbo@gmail.com>
 Paul Ramos <paul.b.ramos@gmail.com>
 Rod Vagg <rod@vagg.org>
-Bennett Sorbo <bsorbo@gmail.com>
 Sebastian Burkhard <sebi.burkhard@gmail.com>
 Zachary Adam Kaplan <razic@viralkitty.com>
+Adam Coulombe <me@adam.co>
 nanto_vi <nanto@moon.email.ne.jp>
 nanto <nanto@moon.email.ne.jp>
 Danil Somsikov <danilasomsikov@gmail.com>
 Ryunosuke SATO <tricknotes.rs@gmail.com>
+Diego Tres <diegotres@gmail.com>
 Jean Boussier <jean.boussier@gmail.com>
-Adam Coulombe <me@adam.co>
 Andrew Plummer <plummer.andrew@gmail.com>
 Mark Raddatz <mraddatz@gmail.com>
+Pascal Borreli <pascal@borreli.com>
 Isaac Z. Schlueter <i@izs.me>
 Karl Sieburg <ksieburg@yahoo.com>
-Pascal Borreli <pascal@borreli.com>
 Nguyen Phuc Lam <ruado1987@gmail.com>
 Dmitry Gusev <dmitry.gusev@gmail.com>
-Michał Gołębiowski-Owczarek <m.goleb@gmail.com>
-Li Xudong <istonelee@gmail.com>
 Steven Benner <admin@stevenbenner.com>
-Tom H Fuertes <tomfuertes@gmail.com>
+Li Xudong <istonelee@gmail.com>
+Michał Gołębiowski-Owczarek <m.goleb@gmail.com>
 Renato Oliveira dos Santos <ros3@cin.ufpe.br>
+Frederic Junod <frederic.junod@camptocamp.com>
+Tom H Fuertes <tomfuertes@gmail.com>
+Mitch Foley <mitch@thefoley.net>
 ros3cin <ros3@cin.ufpe.br>
-Jason Bedard <jason+jquery@jbedard.ca>
 Kyle Robinson Young <kyle@dontkry.com>
+John Paul <john@johnkpaul.com>
+Jason Bedard <jason+jquery@jbedard.ca>
 Chris Talkington <chris@talkingtontech.com>
 Eddie Monge <eddie@eddiemonge.com>
 Terry Jones <terry@jon.es>
 Jason Merino <jasonmerino@gmail.com>
+Dan Burzo <danburzo@gmail.com>
 Jeremy Dunck <jdunck@gmail.com>
 Chris Price <price.c@gmail.com>
 Guy Bedford <guybedford@gmail.com>
+njhamann <njhamann@gmail.com>
+Goare Mao <mygoare@gmail.com>
 Amey Sakhadeo <me@ameyms.com>
 Mike Sidorov <mikes.ekb@gmail.com>
 Anthony Ryan <anthonyryan1@gmail.com>
-Dominik D. Geyer <dominik.geyer@gmail.com>
-George Kats <katsgeorgeek@gmail.com>
 Lihan Li <frankieteardrop@gmail.com>
+George Kats <katsgeorgeek@gmail.com>
+Dongseok Paeng <dongseok83.paeng@lge.com>
 Ronny Springer <springer.ronny@gmail.com>
-Chris Antaki <ChrisAntaki@gmail.com>
-Marian Sollmann <marian.sollmann@cargomedia.ch>
-njhamann <njhamann@gmail.com>
 Ilya Kantor <iliakan@gmail.com>
+Marian Sollmann <marian.sollmann@cargomedia.ch>
+Chris Antaki <ChrisAntaki@gmail.com>
 David Hong <d.hong@me.com>
-John Paul <john@johnkpaul.com>
 Jakob Stoeck <jakob@pokermania.de>
 Christopher Jones <chris@cjqed.com>
 Forbes Lindesay <forbes@lindesay.co.uk>
 S. Andrew Sheppard <andrew@wq.io>
 Leonardo Balter <leonardo.balter@gmail.com>
+Rodrigo Rosenfeld Rosas <rr.rosas@gmail.com>
+Daniel Husar <dano.husar@gmail.com>
+Philip Jägenstedt <philip@foolip.org>
+John Hoven <hovenj@gmail.com>
 Roman Reiß <me@silverwind.io>
 Benjy Cui <benjytrys@gmail.com>
-Rodrigo Rosenfeld Rosas <rr.rosas@gmail.com>
-John Hoven <hovenj@gmail.com>
-Philip Jägenstedt <philip@foolip.org>
 Christian Kosmowski <ksmwsk@gmail.com>
+David Corbacho <davidcorbacho@gmail.com>
 Liang Peng <poppinlp@gmail.com>
 TJ VanToll <tj.vantoll@gmail.com>
-Senya Pugach <upisfree@outlook.com>
 Aurelio De Rosa <aurelioderosa@gmail.com>
+Senya Pugach <upisfree@outlook.com>
+Dan Hart <danhart@notonthehighstreet.com>
 Nazar Mokrynskyi <nazar@mokrynskyi.com>
+Benjamin Tan <demoneaux@gmail.com>
 Amit Merchant <bullredeyes@gmail.com>
 Jason Bedard <jason+github@jbedard.ca>
-Arthur Verschaeve <contact@arthurverschaeve.be>
-Dan Hart <danhart@notonthehighstreet.com>
-Bin Xin <rhyzix@gmail.com>
-David Corbacho <davidcorbacho@gmail.com>
 Veaceslav Grimalschi <grimalschi@yandex.ru>
-Daniel Husar <dano.husar@gmail.com>
-Frederic Hemberger <mail@frederic-hemberger.de>
-Ben Toews <mastahyeti@gmail.com>
-Aditya Raghavan <araghavan3@gmail.com>
-Victor Homyakov <vkhomyackov@gmail.com>
+Richard McDaniel <rm0026@uah.edu>
+Arthur Verschaeve <contact@arthurverschaeve.be>
 Shivaji Varma <contact@shivajivarma.com>
+Ben Toews <mastahyeti@gmail.com>
+Bin Xin <rhyzix@gmail.com>
+Neftaly Hernandez <neftaly.hernandez@gmail.com>
+T.J. Crowder <tj.crowder@farsightsoftware.com>
 Nicolas HENRY <icewil@gmail.com>
+Frederic Hemberger <mail@frederic-hemberger.de>
+Victor Homyakov <vkhomyackov@gmail.com>
+Aditya Raghavan <araghavan3@gmail.com>
 Anne-Gaelle Colom <coloma@westminster.ac.uk>
-George Mauer <gmauer@gmail.com>
 Leonardo Braga <leonardo.braga@gmail.com>
+George Mauer <gmauer@gmail.com>
 Stephen Edgar <stephen@netweb.com.au>
 Thomas Tortorini <thomastortorini@gmail.com>
-Winston Howes <winstonhowes@gmail.com>
+Jörn Wagner <joern.wagner@explicatis.com>
 Jon Hester <jon.d.hester@gmail.com>
+Colin Frick <colin@bash.li>
+Winston Howes <winstonhowes@gmail.com>
 Alexander O'Mara <me@alexomara.com>
-Bastian Buchholz <buchholz.bastian@googlemail.com>
-Arthur Stolyar <nekr.fabula@gmail.com>
-Calvin Metcalf <calvin.metcalf@gmail.com>
-Mu Haibao <mhbseal@163.com>
-Richard McDaniel <rm0026@uah.edu>
 Chris Rebert <github@rebertia.com>
+Bastian Buchholz <buchholz.bastian@googlemail.com>
+Mu Haibao <mhbseal@163.com>
+Calvin Metcalf <calvin.metcalf@gmail.com>
+Arthur Stolyar <nekr.fabula@gmail.com>
 Gabriel Schulhof <gabriel.schulhof@intel.com>
 Gilad Peleg <giladp007@gmail.com>
+Julian Alexander Murillo <julian.alexander.murillo@gmail.com>
+Kevin Kirsche <Kev.Kirsche+GitHub@gmail.com>
 Martin Naumann <martin@geekonaut.de>
+Yongwoo Jeon <yongwoo.jeon@navercorp.com>
+John-David Dalton <john.david.dalton@gmail.com>
 Marek Lewandowski <m.lewandowski@cksource.com>
 Bruno Pérel <brunoperel@gmail.com>
-Reed Loden <reed@reedloden.com>
 Daniel Nill <daniellnill@gmail.com>
-Yongwoo Jeon <yongwoo.jeon@navercorp.com>
+Reed Loden <reed@reedloden.com>
 Sean Henderson <seanh.za@gmail.com>
+Gary Ye <garysye@gmail.com>
 Richard Kraaijenhagen <stdin+git@riichard.com>
 Connor Atherton <c.liam.atherton@gmail.com>
-Gary Ye <garysye@gmail.com>
 Christian Grete <webmaster@christiangrete.com>
+Tom von Clef <thomas.vonclef@gmail.com>
 Liza Ramo <liza.h.ramo@gmail.com>
-Julian Alexander Murillo <julian.alexander.murillo@gmail.com>
 Joelle Fleurantin <joasqueeniebee@gmail.com>
-Jae Sung Park <alberto.park@gmail.com>
-Jun Sun <klsforever@gmail.com>
-Josh Soref <apache@soref.com>
-Henry Wong <henryw4k@gmail.com>
+Steve Mao <maochenyan@gmail.com>
 Jon Dufresne <jon.dufresne@gmail.com>
+Jae Sung Park <alberto.park@gmail.com>
+Josh Soref <apache@soref.com>
+Saptak Sengupta <saptak013@gmail.com>
+Henry Wong <henryw4k@gmail.com>
+Jun Sun <klsforever@gmail.com>
 Martijn W. van der Lee <martijn@vanderlee.com>
 Devin Wilson <dwilson6.github@gmail.com>
-Steve Mao <maochenyan@gmail.com>
+Damian Senn <jquery@topaxi.codes>
 Zack Hall <zackhall@outlook.com>
-Bernhard M. Wiedemann <jquerybmw@lsmod.de>
-Todor Prikumov <tono_pr@abv.bg>
-Jha Naman <createnaman@gmail.com>
-William Robinet <william.robinet@conostix.com>
-Alexander Lisianoi <all3fox@gmail.com>
 Vitaliy Terziev <vitaliyterziev@gmail.com>
+Todor Prikumov <tono_pr@abv.bg>
+Bernhard M. Wiedemann <jquerybmw@lsmod.de>
+Jha Naman <createnaman@gmail.com>
+Alexander Lisianoi <all3fox@gmail.com>
+William Robinet <william.robinet@conostix.com>
 Joe Trumbull <trumbull.j@gmail.com>
 Alexander K <xpyro@ya.ru>
-Damian Senn <jquery@topaxi.codes>
 Ralin Chimev <ralin.chimev@gmail.com>
 Felipe Sateler <fsateler@gmail.com>
 Christophe Tafani-Dereeper <christophetd@hotmail.fr>
@ -295,31 +321,36 @@ Manoj Kumar <nithmanoj@gmail.com>
 David Broder-Rodgers <broder93@gmail.com>
 Alex Louden <alex@louden.com>
 Alex Padilla <alexonezero@outlook.com>
-南漂一卒 <shiy007@qq.com>
 karan-96 <karanbatra96@gmail.com>
+南漂一卒 <shiy007@qq.com>
+Erik Lax <erik@datahack.se>
 Boom Lee <teabyii@gmail.com>
 Andreas Solleder <asol@num42.de>
-CDAGaming <cstack2011@yahoo.com>
 Pierre Spring <pierre@nelm.io>
 Shashanka Nataraj <shashankan.10@gmail.com>
-Erik Lax <erik@datahack.se>
+CDAGaming <cstack2011@yahoo.com>
 Matan Kotler-Berkowitz <205matan@gmail.com>
 Jordan Beland <jordan.beland@gmail.com>
 Henry Zhu <hi@henryzoo.com>
-Saptak Sengupta <saptak013@gmail.com>
 Nilton Cesar <niltoncms@gmail.com>
 basil.belokon <basil.belokon@gmail.com>
+Andrey Meshkov <ay.meshkov@gmail.com>
 tmybr11 <tomas.perone@gmail.com>
 Luis Emilio Velasco Sanchez <emibloque@gmail.com>
 Ed S <ejsanders@gmail.com>
 Bert Zhang <enbo@users.noreply.github.com>
+Sébastien Règne <regseb@users.noreply.github.com>
+wartmanm <3869625+wartmanm@users.noreply.github.com>
+Siddharth Dungarwal <sd5869@gmail.com>
+abnud1 <ahmad13932013@hotmail.com>
 Andrei Fangli <andrei_fangli@outlook.com>
 Marja Hölttä <marja.holtta@gmail.com>
-abnud1 <ahmad13932013@hotmail.com>
 buddh4 <mail@jharrer.de>
-Pat O'Callaghan <patocallaghan@gmail.com>
-Ahmed.S.ElAfifi <ahmed.s.elafifi@gmail.com>
+Hoang <dangkyokhoang@gmail.com>
 Wonseop Kim <wonseop.kim@samsung.com>
+Pat O'Callaghan <patocallaghan@gmail.com>
+JuanMa Ruiz <ruizjuanma@gmail.com>
+Ahmed.S.ElAfifi <ahmed.s.elafifi@gmail.com>
 Christian Oliff <christianoliff@pm.me>
 Christian Wenz <christian@wenz.org>
 Sean Robinson <sean.robinson@scottsdalecc.edu>
--- a/Gruntfile.js
+++ b/Gruntfile.js
@ -61,8 +61,7 @@ module.exports = function( grunt ) {
 			all: {
 				dest: "dist/jquery.js",
 				minimum: [
-					"core",
-					"selector"
+					"core"
 				],

 				// Exclude specified modules if the module matching the key is removed
@ -76,7 +75,7 @@ module.exports = function( grunt ) {
 						include: [ "core/ready-no-deferred" ]
 					},
 					event: [ "deprecated/ajax-event-alias", "deprecated/event" ],
-					sizzle: [ "css/hiddenVisibleSelectors", "effects/animatedSelector" ]
+					selector: [ "css/hiddenVisibleSelectors", "effects/animatedSelector" ]
 				}
 			}
 		},
@ -86,9 +85,6 @@ module.exports = function( grunt ) {
 					destPrefix: "external"
 				},
 				files: {
-					"sizzle/dist": "sizzle/dist",
-					"sizzle/LICENSE.txt": "sizzle/LICENSE.txt",
-
 					"core-js/core-js.js": "core-js/client/core.min.js",
 					"core-js/LICENSE.txt": "core-js/LICENSE",

--- a/README.md
+++ b/README.md
@ -106,11 +106,13 @@ Some example modules that can be excluded are:
 - **exports/global**: Exclude the attachment of global jQuery variables ($ and jQuery) to the window.
 - **exports/amd**: Exclude the AMD definition.

-As a special case, you may also replace Sizzle by using a special flag `grunt custom:-sizzle`.
+As a special case, you may also replace the full jQuery `selector` module by using a special flag `grunt custom:-selector`.

- **sizzle**: The Sizzle selector engine. When this module is excluded, it is replaced by a rudimentary selector engine based on the browser's `querySelectorAll` method that does not support jQuery selector extensions or enhanced semantics. See the [selector-native.js](https://github.com/jquery/jquery/blob/main/src/selector-native.js) file for details.
+- **selector**: The full jQuery selector engine. When this module is excluded, it is replaced by a rudimentary selector engine based on the browser's `querySelectorAll` method that does not support jQuery selector extensions or enhanced semantics. See the [selector-native.js](https://github.com/jquery/jquery/blob/main/src/selector-native.js) file for details.

-*Note*: Excluding Sizzle will also exclude all jQuery selector extensions (such as `effects/animatedSelector` and `css/hiddenVisibleSelectors`).
+For backwards compatibility purposes, the name `sizzle` is recognized as the alias for `selector`.
+
+*Note*: Excluding the full `selector` module will also exclude all jQuery selector extensions (such as `effects/animatedSelector` and `css/hiddenVisibleSelectors`).

 The build process shows a message for each dependent module it excludes or includes.

@ -167,7 +169,7 @@ There is also a special alias to generate a build with the same configuration as
 grunt custom:slim
 ```

-For questions or requests regarding custom builds, please start a thread on the [Developing jQuery Core](https://forum.jquery.com/developing-jquery-core) section of the forum. Due to the combinatorics and custom nature of these builds, they are not regularly tested in jQuery's unit test process. The non-Sizzle selector engine currently does not pass unit tests because it is missing too much essential functionality.
+For questions or requests regarding custom builds, please start a thread on the [Developing jQuery Core](https://forum.jquery.com/developing-jquery-core) section of the forum. Due to the combinatorics and custom nature of these builds, they are not regularly tested in jQuery's unit test process.

 Running the Unit Tests
 --------------------------------------
--- a/build/release.js
+++ b/build/release.js
@ -18,7 +18,6 @@ module.exports = function( Release ) {
 	];
 	const cdn = require( "./release/cdn" );
 	const dist = require( "./release/dist" );
-	const ensureSizzle = require( "./release/ensure-sizzle" );

 	const npmTags = Release.npmTags;

@ -26,14 +25,6 @@ module.exports = function( Release ) {
 		npmPublish: true,
 		issueTracker: "github",

-		/**
-		 * Ensure the repo is in a proper state before release
-		 * @param {Function} callback
-		 */
-		checkRepoState: function( callback ) {
-			ensureSizzle( Release, callback );
-		},
-
 		/**
 		 * Set the version in the src folder for distributing AMD
 		 */
--- a/build/release/dist.js
+++ b/build/release/dist.js
@ -69,7 +69,6 @@ module.exports = function( Release, files, complete ) {

 		// Copy dist files
 		const distFolder = `${ Release.dir.dist }/dist`;
-		const externalFolder = `${ Release.dir.dist }/external`;
 		const readme = await fs.readFile(
 			`${ Release.dir.repo }/build/fixtures/README.md`, "utf8" );
 		const rmIgnore = [ ...files, "node_modules" ]
@ -93,10 +92,6 @@ module.exports = function( Release, files, complete ) {
 			shell.cp( "-f", `${ Release.dir.repo }/${ file }`, distFolder );
 		} );

-		// Copy Sizzle
-		shell.mkdir( "-p", externalFolder );
-		shell.cp( "-rf", `${ Release.dir.repo }/external/sizzle`, externalFolder );
-
 		// Copy other files
 		extras.forEach( function( file ) {
 			shell.cp( "-rf", `${ Release.dir.repo }/${ file }`, Release.dir.dist );
--- a/build/release/ensure-sizzle.js
+++ b/build/release/ensure-sizzle.js
@ -1,35 +0,0 @@
-"use strict";
-
-var fs = require( "fs" ),
-	chalk = require( "chalk" ),
-	sizzleLoc = __dirname + "/../../external/sizzle/dist/sizzle.js",
-	rversion = /Engine v(\d+\.\d+\.\d+(?:-[-\.\d\w]+)?)/;
-
-/**
- * Ensure the /src folder has the latest tag of Sizzle
- * @param {Object} Release
- * @param {Function} callback
- */
-function ensureSizzle( Release, callback ) {
-	console.log();
-	console.log( "Checking Sizzle version..." );
-	var match = rversion.exec( fs.readFileSync( sizzleLoc, "utf8" ) ),
-		version = match ? match[ 1 ] : "Not Found",
-		latest = Release.exec( {
-			command: "npm info sizzle version",
-			silent: true
-		} );
-
-	if ( version !== latest ) {
-		console.log(
-			"The Sizzle version in the src folder (" + chalk.red( version ) +
-			") is not the latest tag (" + chalk.green( latest ) + ")."
-		);
-		Release.confirm( callback );
-	} else {
-		console.log( "Sizzle is latest (" + chalk.green( latest ) + ")" );
-		callback();
-	}
-}
-
-module.exports = ensureSizzle;
--- a/build/tasks/build.js
+++ b/build/tasks/build.js
@ -72,13 +72,6 @@ module.exports = function( grunt ) {
 				)
 				.replace( rdefineEnd, "" );

-		// Sizzle treatment
-		} else if ( /\/sizzle$/.test( name ) ) {
-			contents = "var Sizzle =\n" + contents
-
-				// Remove EXPOSE lines from Sizzle
-				.replace( /\/\/\s*EXPOSE[\w\W]*\/\/\s*EXPOSE/, "return Sizzle;" );
-
 		} else {

 			contents = contents
@ -101,7 +94,7 @@ module.exports = function( grunt ) {

 			// Remove empty definitions
 			contents = contents
-				.replace( /define\(\[[^\]]*\]\)[\W\n]+$/, "" );
+				.replace( /define\(\s*\[[^\]]*\]\s*\)[\W\n]+$/, "" );
 		}

 		// AMD Name
@ -178,14 +171,19 @@ module.exports = function( grunt ) {
 			 * Adds the specified module to the excluded or included list, depending on the flag
 			 * @param {String} flag A module path relative to
 			 *  the src directory starting with + or - to indicate
-			 *  whether it should included or excluded
+			 *  whether it should be included or excluded
 			 */
 			excluder = function( flag ) {
 				var additional,
-					m = /^(\+|\-|)([\w\/-]+)$/.exec( flag ),
+					m = /^(\+|-|)([\w\/-]+)$/.exec( flag ),
 					exclude = m[ 1 ] === "-",
 					module = m[ 2 ];

+				// Recognize the legacy `sizzle` alias
+				if ( module === "sizzle" ) {
+					module = "selector";
+				}
+
 				if ( exclude ) {

 					// Can't exclude certain modules
@ -200,7 +198,16 @@ module.exports = function( grunt ) {
 							// These are the removable dependencies
 							// It's fine if the directory is not there
 							try {
-								excludeList( fs.readdirSync( srcFolder + module ), module );
+
+								// `selector` is a special case as we don't just remove
+								// the module, but we replace it with `selector-native`
+								// which re-uses parts of the `src/selector` folder.
+								if ( module !== "selector" ) {
+									excludeList(
+										fs.readdirSync( `${ srcFolder }/${ module }` ),
+										module
+									);
+								}
 							} catch ( e ) {
 								grunt.verbose.writeln( e );
 							}
@ -218,11 +225,6 @@ module.exports = function( grunt ) {
 						}
 					} else {
 						grunt.log.error( "Module \"" + module + "\" is a minimum requirement." );
-						if ( module === "selector" ) {
-							grunt.log.error(
-								"If you meant to replace Sizzle, use -sizzle instead."
-							);
-						}
 					}
 				} else {
 					grunt.log.writeln( flag );
@ -259,17 +261,16 @@ module.exports = function( grunt ) {
 			excluder( flag );
 		}

-		// Handle Sizzle exclusion
-		// Replace with selector-native
-		if ( ( index = excluded.indexOf( "sizzle" ) ) > -1 ) {
-			config.rawText.selector = "define(['./selector-native']);";
-			excluded.splice( index, 1 );
+		// Handle full selector module exclusion.
+		// Replace with selector-native.
+		if ( excluded.indexOf( "selector" ) > -1 ) {
+			config.rawText.selector = "define([ \"./selector-native\" ]);";
 		}

 		// Replace exports/global with a noop noConflict
 		if ( ( index = excluded.indexOf( "exports/global" ) ) > -1 ) {
-			config.rawText[ "exports/global" ] = "define(['../core']," +
-				"function( jQuery ) {\njQuery.noConflict = function() {};\n});";
+			config.rawText[ "exports/global" ] = "define( [\n\t\"../core\"\n], " +
+				"function( jQuery ) {\n\tjQuery.noConflict = function() {};\n} );";
 			excluded.splice( index, 1 );
 		}

@ -311,9 +312,11 @@ module.exports = function( grunt ) {
 		if ( !optIn ) {

 			// Overwrite the default inclusions with the explicit ones provided
-			config.rawText.jquery = "define([" +
-				( included.length ? included.join( "," ) : "" ) +
-			"]);";
+			config.rawText.jquery = "define( [\n" +
+				( included.length ?
+					included.map( module => "\t\"./" + module + "\"" ).join( ",\n" ) :
+					"" ) +
+			"\n] );";
 		}

 		// Trace dependencies and concatenate files
--- a/dist/.eslintrc.json
+++ b/dist/.eslintrc.json
@ -14,20 +14,7 @@
 			"rules": {
 				// That is okay for the built version
 				"no-multiple-empty-lines": "off",
-				"one-var": "off",
-
-				// Sizzle is not compatible with jQuery code style
-				"no-nested-ternary": "off",
-				"no-unused-expressions": "off",
-				"no-unused-vars": "off",
-				"lines-around-comment": "off",
-				"space-in-parens": "off",
-				"camelcase": "off",
-				"computed-property-spacing": "off",
-				"max-len": "off",
-				"dot-notation": "off",
-				"semi-spacing": "off",
-				"brace-style": "off"
+				"one-var": "off"
 			}
 		}
 	]
--- a/external/sizzle/LICENSE.txt
+++ b/external/sizzle/LICENSE.txt
@ -1,36 +0,0 @@
-Copyright JS Foundation and other contributors, https://js.foundation/
-
-This software consists of voluntary contributions made by many
-individuals. For exact contribution history, see the revision history
-available at https://github.com/jquery/sizzle
-
-The following license applies to all parts of this software except as
-documented below:
-
-====
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-====
-
-All files located in the node_modules and external directories are
-externally maintained libraries used by this software which have their
-own licenses; we recommend you read them, as their terms may differ from
-the terms above.
--- a/external/sizzle/dist/sizzle.js
+++ b/external/sizzle/dist/sizzle.js
--- a/external/sizzle/dist/sizzle.min.js
+++ b/external/sizzle/dist/sizzle.min.js
--- a/external/sizzle/dist/sizzle.min.map
+++ b/external/sizzle/dist/sizzle.min.map
--- a/package.json
+++ b/package.json
@ -61,7 +61,6 @@
    "raw-body": "2.3.3",
    "requirejs": "2.3.6",
    "sinon": "2.3.7",
-    "sizzle": "2.3.8",
    "strip-json-comments": "2.0.1",
    "testswarm": "1.1.2",
    "uglify-js": "3.4.7"
@ -73,9 +72,9 @@
    "test:browser": "grunt && grunt karma:main",
    "test:amd": "grunt && grunt karma:amd",
    "test:no-deprecated": "grunt test:prepare && grunt custom:-deprecated && grunt karma:main",
-    "test:no-sizzle": "grunt test:prepare && grunt custom:-sizzle && grunt karma:main",
+    "test:selector-native": "grunt test:prepare && grunt custom:-selector && grunt karma:main",
    "test:slim": "grunt test:prepare && grunt custom:slim && grunt karma:main",
-    "test": "npm run test:slim && npm run test:no-deprecated && npm run test:no-sizzle && grunt && grunt test:slow && grunt karma:main && grunt karma:amd",
+    "test": "npm run test:slim && npm run test:no-deprecated && npm run test:selector-native && grunt && grunt test:slow && grunt karma:main && grunt karma:amd",
    "jenkins": "npm run test:browserless"
  },
  "commitplease": {
--- a/src/.eslintrc.json
+++ b/src/.eslintrc.json
@ -33,6 +33,13 @@
 			"globals": {
 				"jQuery": false
 			}
+		},
+
+		{
+			"files": "selector.js",
+			"rules": {
+				"indent": "off"
+			}
 		}
 	]
 }
--- a/src/core.js
+++ b/src/core.js
@ -25,8 +25,9 @@ define( [

 "use strict";

-var
-	version = "@VERSION",
+var version = "@VERSION",
+
+	rhtmlSuffix = /HTML$/i,

 	// Define a local copy of jQuery
 	jQuery = function( selector, context ) {
@ -272,6 +273,33 @@ jQuery.extend( {
 		return obj;
 	},

+
+	// Retrieve the text value of an array of DOM nodes
+	text: function( elem ) {
+		var node,
+			ret = "",
+			i = 0,
+			nodeType = elem.nodeType;
+
+		if ( !nodeType ) {
+
+			// If no nodeType, this is expected to be an array
+			while ( ( node = elem[ i++ ] ) ) {
+
+				// Do not traverse comment nodes
+				ret += jQuery.text( node );
+			}
+		} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
+			return elem.textContent;
+		} else if ( nodeType === 3 || nodeType === 4 ) {
+			return elem.nodeValue;
+		}
+
+		// Do not include comment or processing instruction nodes
+
+		return ret;
+	},
+
 	// results is for internal usage only
 	makeArray: function( arr, results ) {
 		var ret = results || [];
@ -294,6 +322,15 @@ jQuery.extend( {
 		return arr == null ? -1 : indexOf.call( arr, elem, i );
 	},

+	isXMLDoc: function( elem ) {
+		var namespace = elem && elem.namespaceURI,
+			docElem = elem && ( elem.ownerDocument || elem ).documentElement;
+
+		// Assume HTML when documentElement doesn't yet exist, such as inside
+		// document fragments.
+		return !rhtmlSuffix.test( namespace || docElem && docElem.nodeName || "HTML" );
+	},
+
 	// Support: Android <=4.0 only, PhantomJS 1 only
 	// push.apply(_, arraylike) throws on ancient WebKit
 	merge: function( first, second ) {
--- a/src/core/isAttached.js
+++ b/src/core/isAttached.js
@ -1,7 +1,7 @@
 define( [
 	"../core",
 	"../var/documentElement",
-	"../selector" // jQuery.contains
+	"../selector/contains" // jQuery.contains
 ], function( jQuery, documentElement ) {
 	"use strict";

--- a/src/core/var/rhtml.js
+++ b/src/core/var/rhtml.js
@ -0,0 +1,7 @@
+define( function() {
+
+"use strict";
+
+return ( /HTML$/i );
+
+} );
--- a/src/manipulation.js
+++ b/src/manipulation.js
@ -248,7 +248,8 @@ jQuery.extend( {
 		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
 				!jQuery.isXMLDoc( elem ) ) {

-			// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2
+			// We eschew jQuery#find here for performance reasons:
+			// https://jsperf.com/getall-vs-sizzle/2
 			destElements = getAll( clone );
 			srcElements = getAll( elem );

--- a/src/selector-native.js
+++ b/src/selector-native.js
@ -3,63 +3,46 @@ define( [
 	"./var/document",
 	"./var/documentElement",
 	"./var/hasOwn",
-	"./var/indexOf"
+	"./var/indexOf",
+
+	// The following utils are attached directly to the jQuery object.
+	"./selector/contains",
+	"./selector/escapeSelector"
 ], function( jQuery, document, documentElement, hasOwn, indexOf ) {

 "use strict";

 /*
- * Optional (non-Sizzle) selector module for custom builds.
+ * Optional limited selector module for custom builds.
 *
 * Note that this DOES NOT SUPPORT many documented jQuery
 * features in exchange for its smaller size:
 *
- * Attribute not equal selector
- * Positional selectors (:first; :eq(n); :odd; etc.)
- * Type selectors (:input; :checkbox; :button; etc.)
- * State-based selectors (:animated; :visible; :hidden; etc.)
- * :has(selector)
- * :not(complex selector)
- * custom selectors via Sizzle extensions
- * Leading combinators (e.g., $collection.find("> *"))
- * Reliable functionality on XML fragments
- * Requiring all parts of a selector to match elements under context
- *   (e.g., $div.find("div > *") now matches children of $div)
- * Matching against non-elements
- * Reliable sorting of disconnected nodes
- * querySelectorAll bug fixes (e.g., unreliable :focus on WebKit)
+ * * Attribute not equal selector (!=)
+ * * Positional selectors (:first; :eq(n); :odd; etc.)
+ * * Type selectors (:input; :checkbox; :button; etc.)
+ * * State-based selectors (:animated; :visible; :hidden; etc.)
+ * * :has(selector)
+ * * :not(complex selector)
+ * * custom selectors via jQuery extensions
+ * * Leading combinators (e.g., $collection.find("> *"))
+ * * Reliable functionality on XML fragments
+ * * Requiring all parts of a selector to match elements under context
+ *     (e.g., $div.find("div > *") now matches children of $div)
+ * * Matching against non-elements
+ * * Reliable sorting of disconnected nodes
+ * * querySelectorAll bug fixes (e.g., unreliable :focus on WebKit)
 *
- * If any of these are unacceptable tradeoffs, either use Sizzle or
- * customize this stub for the project's specific needs.
+ * If any of these are unacceptable tradeoffs, either use the full
+ * selector engine or  customize this stub for the project's specific
+ * needs.
 */

 var hasDuplicate, sortInput,
-	rhtmlSuffix = /HTML$/i,
 	sortStable = jQuery.expando.split( "" ).sort( sortOrder ).join( "" ) === jQuery.expando,
 	matches = documentElement.matches ||
 		documentElement.webkitMatchesSelector ||
-		documentElement.mozMatchesSelector ||
-		documentElement.oMatchesSelector ||
-		documentElement.msMatchesSelector,
-
-	// CSS string/identifier serialization
-	// https://drafts.csswg.org/cssom/#common-serializing-idioms
-	rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\x80-\uFFFF\w-]/g,
-	fcssescape = function( ch, asCodePoint ) {
-		if ( asCodePoint ) {
-
-			// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
-			if ( ch === "\0" ) {
-				return "\uFFFD";
-			}
-
-			// Control characters and (dependent upon position) numbers get escaped as code points
-			return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
-		}
-
-		// Other potentially-special ASCII characters get backslash-escaped
-		return "\\" + ch;
-	};
+		documentElement.msMatchesSelector;

 function sortOrder( a, b ) {

@ -132,14 +115,16 @@ function uniqueSort( results ) {
 	return results;
 }

-function escape( sel ) {
-	return ( sel + "" ).replace( rcssescape, fcssescape );
-}
-
 jQuery.extend( {
+
+	// This method cannot be shared with the main selector module
+	// as it does in 4.x because of an edge case quirk of putting
+	// disconnected elements in the preferred document before other
+	// elements in the full selector module. This will be a minor
+	// breaking change in 4.0.0.
 	uniqueSort: uniqueSort,
 	unique: uniqueSort,
-	escapeSelector: escape,
+
 	find: function( selector, context, results, seed ) {
 		var elem, nodeType,
 			i = 0;
@ -147,13 +132,13 @@ jQuery.extend( {
 		results = results || [];
 		context = context || document;

-		// Same basic safeguard as Sizzle
+		// Same basic safeguard as in the full selector module
 		if ( !selector || typeof selector !== "string" ) {
 			return results;
 		}

-		// Early return if context is not an element or document
-		if ( ( nodeType = context.nodeType ) !== 1 && nodeType !== 9 ) {
+		// Early return if context is not an element, document or document fragment
+		if ( ( nodeType = context.nodeType ) !== 1 && nodeType !== 9 && nodeType !== 11 ) {
 			return [];
 		}

@ -169,46 +154,6 @@ jQuery.extend( {

 		return results;
 	},
-	text: function( elem ) {
-		var node,
-			ret = "",
-			i = 0,
-			nodeType = elem.nodeType;
-
-		if ( !nodeType ) {
-
-			// If no nodeType, this is expected to be an array
-			while ( ( node = elem[ i++ ] ) ) {
-
-				// Do not traverse comment nodes
-				ret += jQuery.text( node );
-			}
-		} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
-
-			// Use textContent for elements
-			return elem.textContent;
-		} else if ( nodeType === 3 || nodeType === 4 ) {
-			return elem.nodeValue;
-		}
-
-		// Do not include comment or processing instruction nodes
-
-		return ret;
-	},
-	contains: function( a, b ) {
-		var bup = b && b.parentNode;
-		return a === bup || !!( bup && bup.nodeType === 1 && a.contains( bup ) );
-	},
-	isXMLDoc: function( elem ) {
-		var namespace = elem.namespaceURI,
-			documentElement = ( elem.ownerDocument || elem ).documentElement;
-
-		// Assume HTML when documentElement doesn't yet exist, such as inside
-		// document fragments.
-		return !rhtmlSuffix.test( namespace ||
-			documentElement && documentElement.nodeName ||
-			"HTML" );
-	},
 	expr: {
 		attrHandle: {},
 		match: {
--- a/src/selector-sizzle.js
+++ b/src/selector-sizzle.js
@ -1,19 +0,0 @@
-define( [
-	"./core",
-	"../external/sizzle/dist/sizzle"
-], function( jQuery, Sizzle ) {
-
-"use strict";
-
-jQuery.find = Sizzle;
-jQuery.expr = Sizzle.selectors;
-
-// Deprecated
-jQuery.expr[ ":" ] = jQuery.expr.pseudos;
-jQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;
-jQuery.text = Sizzle.getText;
-jQuery.isXMLDoc = Sizzle.isXML;
-jQuery.contains = Sizzle.contains;
-jQuery.escapeSelector = Sizzle.escape;
-
-} );
--- a/src/selector.js
+++ b/src/selector.js
--- a/src/selector/contains.js
+++ b/src/selector/contains.js
@ -0,0 +1,21 @@
+define( [
+	"../core"
+], function( jQuery ) {
+
+"use strict";
+
+// Note: an element does not contain itself
+jQuery.contains = function( a, b ) {
+	var bup = b && b.parentNode;
+
+	return a === bup || !!( bup && bup.nodeType === 1 && (
+
+		// Support: IE 9 - 11+
+		// IE doesn't have `contains` on SVG.
+		a.contains ?
+			a.contains( bup ) :
+			a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
+	) );
+};
+
+} );
--- a/src/selector/escapeSelector.js
+++ b/src/selector/escapeSelector.js
@ -0,0 +1,31 @@
+define( [
+	"../core"
+], function( jQuery ) {
+
+"use strict";
+
+// CSS string/identifier serialization
+// https://drafts.csswg.org/cssom/#common-serializing-idioms
+var rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\x80-\uFFFF\w-]/g;
+
+function fcssescape( ch, asCodePoint ) {
+	if ( asCodePoint ) {
+
+		// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
+		if ( ch === "\0" ) {
+			return "\uFFFD";
+		}
+
+		// Control characters and (dependent upon position) numbers get escaped as code points
+		return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
+	}
+
+	// Other potentially-special ASCII characters get backslash-escaped
+	return "\\" + ch;
+}
+
+jQuery.escapeSelector = function( sel ) {
+	return ( sel + "" ).replace( rcssescape, fcssescape );
+};
+
+} );
--- a/src/traversing.js
+++ b/src/traversing.js
@ -55,7 +55,7 @@ jQuery.fn.extend( {
 					if ( cur.nodeType < 11 && ( targets ?
 						targets.index( cur ) > -1 :

-						// Don't pass non-elements to Sizzle
+						// Don't pass non-elements to jQuery#find
 						cur.nodeType === 1 &&
 							jQuery.find.matchesSelector( cur, selectors ) ) ) {

--- a/src/var/pop.js
+++ b/src/var/pop.js
@ -0,0 +1,9 @@
+define( [
+	"./arr"
+], function( arr ) {
+
+"use strict";
+
+return arr.pop;
+
+} );
--- a/src/var/sort.js
+++ b/src/var/sort.js
@ -0,0 +1,9 @@
+define( [
+	"./arr"
+], function( arr ) {
+
+"use strict";
+
+return arr.sort;
+
+} );
--- a/src/var/splice.js
+++ b/src/var/splice.js
@ -0,0 +1,9 @@
+define( [
+	"./arr"
+], function( arr ) {
+
+"use strict";
+
+return arr.splice;
+
+} );
--- a/src/wrapper.js
+++ b/src/wrapper.js
@ -2,9 +2,6 @@
 * jQuery JavaScript Library v@VERSION
 * https://jquery.com/
 *
- * Includes Sizzle.js
- * https://sizzlejs.com/
- *
 * Copyright OpenJS Foundation and other contributors
 * Released under the MIT license
 * https://jquery.org/license
--- a/test/.eslintrc.json
+++ b/test/.eslintrc.json
@ -18,6 +18,7 @@
 		"ajaxTest": false,
 		"testIframe": false,
 		"createDashboardXML": false,
+		"createWithFriesXML": false,
 		"createXMLFragment": false,
 		"includesModule": false,
 		"moduleTeardown": false,
--- a/test/data/qunit-fixture.html
+++ b/test/data/qunit-fixture.html
@ -1,8 +1,8 @@
 <p id="firstp">See <a id="simon1" href="http://simon.incutio.com/archive/2003/03/25/#getElementsBySelector" rel="bookmark">this blog entry</a> for more information.</p>
 <p id="ap">
-	Here are some links in a normal paragraph: <a id="google" href="http://www.google.com/" title="Google!">Google</a>,
+	Here are some [links] in a normal paragraph: <a id="google" href="http://www.google.com/" title="Google!">Google</a>,
 	<a id="groups" href="http://groups.google.com/" class="GROUPS">Google Groups (Link)</a>.
-	This link has <code><a href="http://smin" id="anchor1">class="blog"</a></code>:
+	This link has <code id="code1"><a href="http://smin" id="anchor1">class="blog"</a></code>:
 	<a href="http://diveintomark.org/" class="blog" hreflang="en" id="mark">diveintomark</a>

 </p>
@ -78,11 +78,11 @@
 		<param name="p2" value="x2" />
 	</object>

-	<span id="台北Táiběi"></span>
+	<span id="台北Táiběi"><span id="台北Táiběi-child"></span></span>
 	<span id="台北" lang="中文"></span>
-	<span id="utf8class1" class="台北Táiběi 台北"></span>
+	<span id="utf8class1" class="台北Táiběi 台北">"'台北Táiběi"'</span>
 	<span id="utf8class2" class="台北"></span>
-	<span id="foo:bar" class="foo:bar"></span>
+	<span id="foo:bar" class="foo:bar"><span id="foo_descendant"></span></span>
 	<span id="test.foo[5]bar" class="test.foo[5]bar"></span>

 	<foo_bar id="foobar">test element</foo_bar>
@ -116,6 +116,11 @@ Z</textarea>
 	<input type="radio" name="R1" value="2" />
 	<input type="text" name="My Name" value="me" />
 	<input type="reset" name="reset" value="NO" />
+	<div class="empty-name-container">
+		<div id="empty-name-parent">
+			<input type="text" id="name-empty" name="" value="" />
+		</div>
+	</div>
 	<select name="S1">
 		<option value="abc">ABC</option>
 		<option value="abc">ABC</option>
@ -163,7 +168,26 @@ Z</textarea>
 	<div id="t6652">
 		<div></div>
 	</div>
+	<div id="t12087">
+		<input type="hidden" id="el12087" data-comma="0,1"/>
+	</div>
 	<div id="no-clone-exception"><object><embed></embed></object></div>
+	<div id="names-group">
+		<span id="name-is-example" name="example"></span>
+		<span id="name-is-div" name="div"></span>
+	</div>
+	<div id="id-name-tests">
+		<a id="tName1ID" name="tName1"><span></span></a>
+		<a id="tName2ID" name="tName2"><span></span></a>
+		<div id="tName1"><span id="tName1-span">C</span></div>
+	</div>
+	<div id="whitespace-lists">
+		<input id="t15233-single" data-15233="foo"/>
+		<input id="t15233-double" data-15233="foo bar"/>
+		<input id="t15233-double-tab" data-15233="foo	bar"/>
+		<input id="t15233-double-nl" data-15233="foo&#xA;bar"/>
+		<input id="t15233-triple" data-15233="foo bar baz"/>
+	</div>
 </div>

 <div id="tabindex-tests">
@ -194,6 +218,53 @@ Z</textarea>
 	<span id="liveSpan2"><a href="#" id="liveLink2"></a></span>
 </div>

+<form id="disabled-tests">
+	<fieldset id="disabled-fieldset" disabled="disabled">
+		<a id="disabled-fieldset-a" href="#"></a>
+		<input id="disabled-fieldset-input" name="disabled-fieldset-input" type="text" />
+		<textarea id="disabled-fieldset-textarea" name="disabled-fieldset-textarea" ></textarea>
+		<button id="disabled-fieldset-button" name="disabled-fieldset-button">Go</button>
+		<!-- exclude <select> because IE6 is bugged and fails
+		<select id="disabled-fieldset-select" name="disabled-fieldset-select"></select>
+		-->
+		<span id="disabled-fieldset-span">Neither enabled nor disabled</span>
+	</fieldset>
+	<fieldset id="enabled-fieldset">
+		<a id="disabled-a" href="#" disabled="disabled"></a>
+		<input id="disabled-input" name="disabled-input" type="text" disabled="disabled"/>
+		<textarea id="disabled-textarea" name="disabled-textarea" disabled="disabled"></textarea>
+		<button id="disabled-button" name="disabled-button" disabled="disabled">Go</button>
+		<select id="disabled-select" name="disabled-select" disabled="disabled">
+			<optgroup id="disabled-optgroup" label="and" disabled="disabled">
+				<option id="disabled-option" disabled="disabled">Black</option>
+			</optgroup>
+		</select>
+		<input id="enabled-input" name="enabled-input" type="text"/>
+		<textarea id="enabled-textarea" name="enabled-textarea"></textarea>
+		<button id="enabled-button" name="enabled-button">Go</button>
+		<select id="enabled-select" name="enabled-select">
+			<optgroup id="enabled-optgroup" label="and">
+				<option id="enabled-option">Gold</option>
+			</optgroup>
+		</select>
+		<span id="enabled-fieldset-span">Neither enabled nor disabled</span>
+	</fieldset>
+	<select id="disabled-select-inherit" name="disabled-select-inherit" disabled="disabled">
+		<optgroup id="disabled-optgroup-inherit" label="and" disabled="disabled">
+			<option id="disabled-optgroup-option">Black</option>
+		</optgroup>
+		<optgroup id="enabled-optgroup-inherit" label="and">
+			<option id="enabled-optgroup-option">Gold</option>
+		</optgroup>
+	</select>
+	<select id="enabled-select-inherit" name="enabled-select-inherit">
+		<optgroup id="en_disabled-optgroup-inherit" label="and" disabled="disabled">
+			<option id="en_disabled-optgroup-option">Black</option>
+		</optgroup>
+		<option id="enabled-select-option">Black</option>
+	</select>
+</form>
+
 <div id="siblingTest">
 	<em id="siblingfirst">1</em>
 	<em id="siblingnext">2</em>
@ -208,7 +279,7 @@ Z</textarea>
 </div>
 <div id="fx-test-group" style="position: absolute; width: 1px; height: 1px; overflow: hidden;">
 	<div id="fx-queue" name="test">
-		<div id="fadein" class='chain-test' name='div'>fadeIn<div>fadeIn</div></div>
+		<div id="fadein" class='chain-test'>fadeIn<div>fadeIn</div></div>
 		<div id="fadeout" class='chain-test chain-test-out'>fadeOut<div>fadeOut</div></div>

 		<div id="show" class='chain-test'>show<div>show</div></div>
@ -235,3 +306,4 @@ Z</textarea>
 	<div id="fx-tests"></div>
 	<span id="display"></span>
 </div>
+<br id="last"/>
--- a/test/data/selector/sizzle_cache.html
+++ b/test/data/selector/sizzle_cache.html
@ -2,7 +2,7 @@
 <html>
 <head>
 	<meta http-equiv="Content-type" content="text/html; charset=utf-8">
-	<title>jQuery selector - sizzle cache</title>
+	<title>jQuery selector - cache</title>

 	<script src="../../jquery.js"></script>
 	<script src="../iframeTest.js"></script>
--- a/test/data/selector/mixed_sort.html
+++ b/test/data/selector/mixed_sort.html
@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<title>jQuery selector - cross-window uniqueSort</title>
+
+	<script src="../../jquery.js"></script>
+	<script src="../iframeTest.js"></script>
+</head>
+<body>
+<script>
+	var doc = parent.document,
+		unframed = [ doc.getElementById( "qunit-fixture" ), doc.body, doc.documentElement ],
+		framed = jQuery.find( "*" );
+
+	startIframeTest(
+		jQuery.uniqueSort( unframed.concat( framed ) ),
+		framed.concat( unframed.slice(0).reverse() )
+	);
+</script>
+</body>
+</html>
--- a/test/data/testinit.js
+++ b/test/data/testinit.js
@ -1,5 +1,7 @@
 /* eslint no-multi-str: "off" */

+"use strict";
+
 var FILEPATH = "/test/data/testinit.js",
 	activeScript = [].slice.call( document.getElementsByTagName( "script" ), -1 )[ 0 ],
 	parentUrl = activeScript && activeScript.src ?
@ -49,28 +51,22 @@ this.q = function() {
 /**
 * Asserts that a select matches the given IDs
 * @param {String} message - Assertion name
- * @param {String} selector - Sizzle selector
+ * @param {String} selector - jQuery selector
 * @param {String} expectedIds - Array of ids to construct what is expected
 * @param {(String|Node)=document} context - Selector context
 * @example match("Check for something", "p", ["foo", "bar"]);
 */
 function match( message, selector, expectedIds, context, assert ) {
-	var f = jQuery( selector, context ).get(),
-		s = "",
-		i = 0;
+	var elems = jQuery( selector, context ).get();

-	for ( ; i < f.length; i++ ) {
-		s += ( s && "," ) + "\"" + f[ i ].id + "\"";
-	}
-
-	assert.deepEqual( f, q.apply( q, expectedIds ), message + " (" + selector + ")" );
+	assert.deepEqual( elems, q.apply( q, expectedIds ), message + " (" + selector + ")" );
 }

 /**
 * Asserts that a select matches the given IDs.
 * The select is not bound by a context.
 * @param {String} message - Assertion name
- * @param {String} selector - Sizzle selector
+ * @param {String} selector - jQuery selector
 * @param {String} expectedIds - Array of ids to construct what is expected
 * @example t("Check for something", "p", ["foo", "bar"]);
 */
@ -82,7 +78,7 @@ QUnit.assert.t = function( message, selector, expectedIds ) {
 * Asserts that a select matches the given IDs.
 * The select is performed within the `#qunit-fixture` context.
 * @param {String} message - Assertion name
- * @param {String} selector - Sizzle selector
+ * @param {String} selector - jQuery selector
 * @param {String} expectedIds - Array of ids to construct what is expected
 * @example selectInFixture("Check for something", "p", ["foo", "bar"]);
 */
@ -106,6 +102,36 @@ this.createDashboardXML = function() {
 	return jQuery.parseXML( string );
 };

+this.createWithFriesXML = function() {
+	var string = "<?xml version='1.0' encoding='UTF-8'?> \
+	<soap:Envelope xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/' \
+		xmlns:xsd='http://www.w3.org/2001/XMLSchema' \
+		xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'> \
+		<soap:Body> \
+			<jsconf xmlns='http://www.example.com/ns1'> \
+				<response xmlns:ab='http://www.example.com/ns2'> \
+					<meta> \
+						<component id='seite1' class='component'> \
+							<properties xmlns:cd='http://www.example.com/ns3'> \
+								<property name='prop1'> \
+									<thing /> \
+									<value>1</value> \
+								</property> \
+								<property name='prop2'> \
+									<thing att='something' /> \
+								</property> \
+								<foo_bar>foo</foo_bar> \
+							</properties> \
+						</component> \
+					</meta> \
+				</response> \
+			</jsconf> \
+		</soap:Body> \
+	</soap:Envelope>";
+
+	return jQuery.parseXML( string );
+};
+
 this.createWithFriesXML = function() {
 	var string = "<?xml version='1.0' encoding='UTF-8'?> \
 	<soap:Envelope xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/' \
@ -384,6 +410,18 @@ this.loadTests = function() {

 	// Get testSubproject from testrunner first
 	require( [ parentUrl + "test/data/testrunner.js" ], function() {
+
+		// Says whether jQuery positional selector extensions are supported.
+		// A full selector engine is required to support them as they need to
+		// be evaluated left-to-right. Remove that property when support for
+		// positional selectors is dropped.
+		QUnit.jQuerySelectorsPos = includesModule( "selector" );
+
+		// Says whether jQuery selector extensions are supported. Change that
+		// to `false` if your custom jQuery versions relies more on native qSA.
+		// This doesn't include support for positional selectors (see above).
+		QUnit.jQuerySelectors = includesModule( "selector" );
+
 		var i = 0,
 			tests = [
 				// A special module with basic tests, meant for
--- a/test/unit/attributes.js
+++ b/test/unit/attributes.js
@ -1270,7 +1270,7 @@ QUnit.test( "addClass(Array)", function( assert ) {
 } );

 QUnit.test( "addClass(Function) with incoming value", function( assert ) {
-	assert.expect( 52 );
+	assert.expect( 59 );
 	var pass, i,
 		div = jQuery( "#qunit-fixture div" ),
 		old = div.map( function() {
@ -1278,10 +1278,8 @@ QUnit.test( "addClass(Function) with incoming value", function( assert ) {
 		} );

 	div.addClass( function( i, val ) {
-		if ( this.id !== "_firebugConsole" ) {
-			assert.equal( val, old[ i ], "Make sure the incoming value is correct." );
-			return "test";
-		}
+		assert.equal( val, old[ i ], "Make sure the incoming value is correct." );
+		return "test";
 	} );

 	pass = true;
@ -1347,17 +1345,15 @@ QUnit.test( "removeClass(Array) - simple", function( assert ) {
 } );

 QUnit.test( "removeClass(Function) with incoming value", function( assert ) {
-	assert.expect( 52 );
+	assert.expect( 59 );

 	var $divs = jQuery( "#qunit-fixture div" ).addClass( "test" ), old = $divs.map( function() {
 		return jQuery( this ).attr( "class" );
 	} );

 	$divs.removeClass( function( i, val ) {
-		if ( this.id !== "_firebugConsole" ) {
-			assert.equal( val, old[ i ], "Make sure the incoming value is correct." );
-			return "test";
-		}
+		assert.equal( val, old[ i ], "Make sure the incoming value is correct." );
+		return "test";
 	} );

 	assert.ok( !$divs.is( ".test" ), "Remove Class" );
--- a/test/unit/core.js
+++ b/test/unit/core.js
@ -66,7 +66,7 @@ QUnit.test( "jQuery()", function( assert ) {
 	assert.equal( jQuery( "" ).length, 0, "jQuery('') === jQuery([])" );
 	assert.deepEqual( jQuery( obj ).get(), obj.get(), "jQuery(jQueryObj) == jQueryObj" );

-	// Invalid #id goes to Sizzle which will throw an error (gh-1682)
+	// Invalid #id will throw an error (gh-1682)
 	try {
 		jQuery( "#" );
 	} catch ( e ) {
@ -153,7 +153,7 @@ QUnit.test( "jQuery()", function( assert ) {
 		"Empty attributes object is not interpreted as a document (trac-8950)" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "jQuery(selector, context)", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "jQuery(selector, context)", function( assert ) {
 	assert.expect( 3 );
 	assert.deepEqual( jQuery( "div p", "#qunit-fixture" ).get(), q( "sndp", "en", "sap" ), "Basic selector with string as context" );
 	assert.deepEqual( jQuery( "div p", q( "qunit-fixture" )[ 0 ] ).get(), q( "sndp", "en", "sap" ), "Basic selector with element as context" );
@ -417,6 +417,16 @@ QUnit.test( "isXMLDoc - XML", function( assert ) {
 	assert.ok( jQuery.isXMLDoc( jQuery( "desc", svg )[ 0 ] ), "XML desc Element" );
 } );

+QUnit.test( "isXMLDoc - falsy", function( assert ) {
+	assert.expect( 5 );
+
+	assert.strictEqual( jQuery.isXMLDoc( undefined ), false, "undefined" );
+	assert.strictEqual( jQuery.isXMLDoc( null ), false, "null" );
+	assert.strictEqual( jQuery.isXMLDoc( false ), false, "false" );
+	assert.strictEqual( jQuery.isXMLDoc( 0 ), false, "0" );
+	assert.strictEqual( jQuery.isXMLDoc( "" ), false, "\"\"" );
+} );
+
 QUnit.test( "XSS via location.hash", function( assert ) {
 	var done = assert.async();
 	assert.expect( 1 );
@ -475,7 +485,7 @@ QUnit.test( "jQuery('html')", function( assert ) {

 	//equal( jQuery( "element[attribute=<div></div>]" ).length, 0,
 	//	"When html is within brackets, do not recognize as html." );
-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectors ) {
 		assert.equal( jQuery( "element:not(<div></div>)" ).length, 0,
 			"When html is within parens, do not recognize as html." );
 	} else {
--- a/test/unit/css.js
+++ b/test/unit/css.js
@ -965,7 +965,7 @@ QUnit.test( "show/hide 3.0, inline hidden", function( assert ) {
 	} );
 } );

-QUnit[ jQuery.find.compile && jQuery.fn.toggle ? "test" : "skip" ]( "toggle()", function( assert ) {
+QUnit[ QUnit.jQuerySelectors && jQuery.fn.toggle ? "test" : "skip" ]( "toggle()", function( assert ) {
 	assert.expect( 9 );
 	var div, oldHide,
 		x = jQuery( "#foo" );
@ -998,7 +998,7 @@ QUnit[ jQuery.find.compile && jQuery.fn.toggle ? "test" : "skip" ]( "toggle()",
 	jQuery.fn.hide = oldHide;
 } );

-QUnit[ jQuery.find.compile && jQuery.fn.toggle ? "test" : "skip" ]( "detached toggle()", function( assert ) {
+QUnit[ QUnit.jQuerySelectors && jQuery.fn.toggle ? "test" : "skip" ]( "detached toggle()", function( assert ) {
 	assert.expect( 6 );
 	var detached = jQuery( "<p><a></a><p>" ).find( "*" ).addBack(),
 		hiddenDetached = jQuery( "<p><a></a></p>" ).find( "*" ).addBack().css( "display", "none" ),
@ -1022,12 +1022,14 @@ QUnit[ jQuery.find.compile && jQuery.fn.toggle ? "test" : "skip" ]( "detached to
 		"cascade-hidden element in detached tree" );
 } );

-QUnit[ jQuery.find.compile && jQuery.fn.toggle &&
+QUnit[ QUnit.jQuerySelectors && jQuery.fn.toggle &&
 	document.body.attachShadow && document.body.getRootNode ?
 		"test" :
 		"skip"
 ]( "shadow toggle()", function( assert ) {
+
 	assert.expect( 4 );
+
 	jQuery( "<div id='shadowHost'></div>" ).appendTo( "#qunit-fixture" );
 	var shadowHost = document.querySelector( "#shadowHost" );
 	var shadowRoot = shadowHost.attachShadow( { mode: "open" } );
@ -1450,7 +1452,7 @@ QUnit.test( "css opacity consistency across browsers (trac-12685)", function( as
 	assert.equal( Math.round( el.css( "opacity" ) * 100 ), 10, "remove opacity override" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( ":visible/:hidden selectors", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( ":visible/:hidden selectors", function( assert ) {
 	assert.expect( 17 );

 	var $div, $table, $a;
@ -1486,7 +1488,12 @@ QUnit[ jQuery.find.compile ? "test" : "skip" ]( ":visible/:hidden selectors", fu
 	$table.css( "display", "none" ).html( "<tr><td>cell</td><td>cell</td></tr>" );
 	assert.equal( jQuery( "#table td:visible" ).length, 0, "hidden cell children not perceived as visible (trac-4512)" );

-	assert.t( "Is Visible", "#qunit-fixture div:visible:lt(2)", [ "foo", "nothiddendiv" ] );
+	if ( QUnit.jQuerySelectorsPos ) {
+		assert.t( "Is Visible", "#qunit-fixture div:visible:lt(2)", [ "foo", "nothiddendiv" ] );
+	} else {
+		assert.ok( "skip", "Positional selectors are not supported" );
+	}
+
 	assert.t( "Is Not Hidden", "#qunit-fixture:hidden", [] );
 	assert.t( "Is Hidden", "#form input:hidden", [ "hidden1", "hidden2" ] );

--- a/test/unit/effects.js
+++ b/test/unit/effects.js
@ -29,7 +29,7 @@ QUnit.module( "effects", {
 	}
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "sanity check", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "sanity check", function( assert ) {
 	assert.expect( 1 );
 	assert.equal( jQuery( "#qunit-fixture:visible, #foo:visible" ).length, 2, "QUnit state is correct for testing effects" );
 } );
@ -812,7 +812,7 @@ QUnit.test( "stop( queue, ..., ... ) - Stop single queues", function( assert ) {
        this.clock.tick( 500 );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "toggle()", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "toggle()", function( assert ) {
 	assert.expect( 6 );
 	var x = jQuery( "#foo" );
 	assert.ok( x.is( ":visible" ), "is visible" );
@ -1638,7 +1638,7 @@ QUnit.test( "animate should set display for disconnected nodes", function( asser
 	clock.tick( 400 );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "Animation callback should not show animated element as :animated (trac-7157)", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "Animation callback should not show animated element as :animated (trac-7157)", function( assert ) {
 	assert.expect( 1 );

 	var foo = jQuery( "#foo" );
@ -1651,7 +1651,7 @@ QUnit[ jQuery.find.compile ? "test" : "skip" ]( "Animation callback should not s
 	this.clock.tick( 100 );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "Initial step callback should show element as :animated (trac-14623)", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "Initial step callback should show element as :animated (trac-14623)", function( assert ) {
 	assert.expect( 1 );

 	var foo = jQuery( "#foo" );
@ -2167,7 +2167,7 @@ QUnit.test( ".finish() completes all queued animations", function( assert ) {
 	} );
 	assert.equal( div.queue().length, 0, "empty queue when done" );

-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectors ) {
 		assert.equal( div.is( ":animated" ), false, ":animated doesn't match" );
 	} else {
 		assert.ok( "skip", ":animated selector not supported with selector-native" );
@ -2207,7 +2207,7 @@ QUnit.test( ".finish( false ) - unqueued animations", function( assert ) {
 		assert.equal( parseFloat( div.css( prop ) ), value, prop + " finished at correct value" );
 	} );

-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectors ) {
 		assert.equal( div.is( ":animated" ), false, ":animated doesn't match" );
 	} else {
 		assert.ok( "skip", ":animated selector not supported with selector-native" );
@ -2246,7 +2246,7 @@ QUnit.test( ".finish( \"custom\" ) - custom queue animations", function( assert
 	// start the first animation
 	div.dequeue( "custom" );

-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectors ) {
 		assert.equal( div.is( ":animated" ), true, ":animated matches" );
 	} else {
 		assert.ok( "skip", ":animated selector not supported with selector-native" );
@ -2257,7 +2257,7 @@ QUnit.test( ".finish( \"custom\" ) - custom queue animations", function( assert
 		assert.equal( parseFloat( div.css( prop ) ), value, prop + " finished at correct value" );
 	} );

-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectors ) {
 		assert.equal( div.is( ":animated" ), false, ":animated doesn't match" );
 	} else {
 		assert.ok( "skip", ":animated selector not supported with selector-native" );
--- a/test/unit/event.js
+++ b/test/unit/event.js
@ -1840,7 +1840,7 @@ QUnit.test( "events with type matching an Object.prototype property, cloned elem
 } );

 // selector-native does not support scope-fixing in delegation
-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "delegated event with delegateTarget-relative selector", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "delegated event with delegateTarget-relative selector", function( assert ) {
 	assert.expect( 3 );
 	var markup = jQuery( "<div><ul><li><a id=\"a0\"></a><ul id=\"ul0\"><li class=test><a id=\"a0_0\"></a></li><li><a id=\"a0_1\"></a></li></ul></li></ul></div>" ).appendTo( "#qunit-fixture" );

@ -1858,18 +1858,23 @@ QUnit[ jQuery.find.compile ? "test" : "skip" ]( "delegated event with delegateTa
 		.find( "#a0_0" ).trigger( "click" ).end()
 		.off( "click" );

-	// Positional selector (trac-11315)
-	markup.find( "ul" ).eq( 0 )
-		.on( "click", ">li>a", function() {
-			assert.ok( this.id === "a0", "child li was clicked" );
-		} )
-		.find( "#ul0" )
-			.on( "click", "li:first>a", function() {
-				assert.ok( this.id === "a0_0", "first li under #u10 was clicked" );
+	if ( QUnit.jQuerySelectorsPos ) {
+		// Positional selector (trac-11315)
+		markup.find( "ul" ).eq( 0 )
+			.on( "click", ">li>a", function() {
+				assert.ok( this.id === "a0", "child li was clicked" );
 			} )
-		.end()
-		.find( "a" ).trigger( "click" ).end()
-		.find( "#ul0" ).off();
+			.find( "#ul0" )
+				.on( "click", "li:first>a", function() {
+					assert.ok( this.id === "a0_0", "first li under #u10 was clicked" );
+				} )
+			.end()
+			.find( "a" ).trigger( "click" ).end()
+			.find( "#ul0" ).off();
+	} else {
+		assert.ok( "skip", "Positional selectors are not supported" );
+		assert.ok( "skip", "Positional selectors are not supported" );
+	}

 	markup.remove();
 } );
--- a/test/unit/manipulation.js
+++ b/test/unit/manipulation.js
@ -193,7 +193,7 @@ function testAppendForObject( valueObj, isFragment, assert ) {

 function testAppend( valueObj, assert ) {

-	assert.expect( 78 );
+	assert.expect( 82 );

 	testAppendForObject( valueObj, false, assert );
 	testAppendForObject( valueObj, true, assert );
@ -1984,7 +1984,7 @@ QUnit.test( "remove() with filters", function( assert ) {
 	div.children().remove( "span:nth-child(2n)" );
 	assert.equal( div.text(), "13", "relative selector in remove" );

-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectorsPos ) {
 		div = jQuery( markup );
 		div.children().remove( "span:first" );
 		assert.equal( div.text(), "234", "positional selector in remove" );
@ -1992,8 +1992,8 @@ QUnit.test( "remove() with filters", function( assert ) {
 		div.children().remove( "span:last" );
 		assert.equal( div.text(), "123", "positional selector in remove" );
 	} else {
-		assert.ok( "skip", "Positional selectors not supported in selector-native" );
-		assert.ok( "skip", "Positional selectors not supported in selector-native" );
+		assert.ok( "skip", "Positional selectors are not supported" );
+		assert.ok( "skip", "Positional selectors are not supported" );
 	}

 	// using contents will get comments regular, text, and comment nodes
@ -2081,7 +2081,7 @@ QUnit.test( "detach() with filters", function( assert ) {
 	div.children().detach( "span:nth-child(2n)" );
 	assert.equal( div.text(), "13", "relative selector in detach" );

-	if ( jQuery.find.compile ) {
+	if ( QUnit.jQuerySelectorsPos ) {
 		div = jQuery( markup );
 		div.children().detach( "span:first" );
 		assert.equal( div.text(), "234", "positional selector in detach" );
@ -2089,8 +2089,8 @@ QUnit.test( "detach() with filters", function( assert ) {
 		div.children().detach( "span:last" );
 		assert.equal( div.text(), "123", "positional selector in detach" );
 	} else {
-		assert.ok( "skip", "positional selectors not supported in selector-native" );
-		assert.ok( "skip", "positional selectors not supported in selector-native" );
+		assert.ok( "skip", "Positional selectors are not supported" );
+		assert.ok( "skip", "Positional selectors are not supported" );
 	}

 	// using contents will get comments regular, text, and comment nodes
--- a/test/unit/selector.js
+++ b/test/unit/selector.js
--- a/test/unit/support.js
+++ b/test/unit/support.js
@ -59,262 +59,377 @@ testIframe(
 		userAgent = window.navigator.userAgent,
 		expectedMap = {
 			edge: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": false,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: false,
+				scope: false,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			ie_10_11: {
-				"ajax": true,
-				"boxSizingReliable": false,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": false,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": true,
-				"noCloneChecked": false,
-				"option": true,
-				"optSelected": false,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": false,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": false,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: false,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: false,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: true,
+				getById: true,
+				noCloneChecked: false,
+				option: true,
+				optSelected: false,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: false,
+				reliableMarginLeft: true,
+				reliableTrDimensions: false,
+				scope: false,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			ie_9: {
-				"ajax": true,
-				"boxSizingReliable": false,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": false,
-				"cors": false,
-				"createHTMLDocument": true,
-				"focusin": true,
-				"noCloneChecked": false,
-				"option": false,
-				"optSelected": false,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": false,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": false,
-				"scrollboxSize": false
+				ajax: true,
+				boxSizingReliable: false,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: false,
+				cssSupportsSelector: false,
+				cors: false,
+				createHTMLDocument: true,
+				disconnectedMatch: false,
+				focusin: true,
+				getById: false,
+				noCloneChecked: false,
+				option: false,
+				optSelected: false,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: false,
+				reliableMarginLeft: true,
+				reliableTrDimensions: false,
+				scope: false,
+				scrollboxSize: false,
+				sortDetached: true,
+				sortStable: true
 			},
 			chrome: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			safari: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			safari_9_10: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": false,
-				"pixelPosition": false,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: false,
+				pixelPosition: false,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			firefox: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": false,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: true,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: false,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
+			},
+			firefox_102: {
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: false,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			firefox_60: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": true,
-				"reliableMarginLeft": false,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: false,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			ios: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": true,
-				"pixelPosition": true,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: true,
+				pixelPosition: true,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			ios_9_10: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": false,
-				"pixelPosition": false,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: false,
+				pixelPosition: false,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			ios_8: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": false,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": false,
-				"pixelPosition": false,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: false,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: false,
+				pixelPosition: false,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			ios_7: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": true,
-				"checkOn": true,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": false,
-				"pixelPosition": false,
-				"radioValue": true,
-				"reliableMarginLeft": true,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: true,
+				checkOn: true,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: false,
+				pixelPosition: false,
+				radioValue: true,
+				reliableMarginLeft: true,
+				reliableTrDimensions: true,
+				scope: true,
+				scrollboxSize: true,
+				sortDetached: true,
+				sortStable: true
 			},
 			android: {
-				"ajax": true,
-				"boxSizingReliable": true,
-				"checkClone": false,
-				"checkOn": false,
-				"clearCloneStyle": true,
-				"cors": true,
-				"createHTMLDocument": true,
-				"focusin": false,
-				"noCloneChecked": true,
-				"option": true,
-				"optSelected": true,
-				"pixelBoxStyles": false,
-				"pixelPosition": false,
-				"radioValue": true,
-				"reliableMarginLeft": false,
-				"reliableTrDimensions": true,
-				"scrollboxSize": true
+				ajax: true,
+				boxSizingReliable: true,
+				checkClone: false,
+				checkOn: false,
+				clearCloneStyle: true,
+				cssSupportsSelector: false,
+				cors: true,
+				createHTMLDocument: true,
+				disconnectedMatch: true,
+				focusin: false,
+				getById: true,
+				noCloneChecked: true,
+				option: true,
+				optSelected: true,
+				pixelBoxStyles: false,
+				pixelPosition: false,
+				radioValue: true,
+				reliableMarginLeft: false,
+				reliableTrDimensions: true,
+				scope: false,
+				scrollboxSize: true,
+				sortDetached: false,
+				sortStable: false
 			}
 		};

 	// Make the slim build pass tests.
 	for ( browserKey in expectedMap ) {
-		if ( !jQuery.ajax ) {
+		if ( !includesModule( "ajax" ) ) {
 			delete expectedMap[ browserKey ].ajax;
 			delete expectedMap[ browserKey ].cors;
 		}
 	}

+	// Make the selector-native build pass tests.
+	for ( browserKey in expectedMap ) {
+		if ( !includesModule( "selector" ) ) {
+			delete expectedMap[ browserKey ].cssSupportsSelector;
+			delete expectedMap[ browserKey ].disconnectedMatch;
+			delete expectedMap[ browserKey ].getById;
+			delete expectedMap[ browserKey ].scope;
+			delete expectedMap[ browserKey ].sortDetached;
+			delete expectedMap[ browserKey ].sortStable;
+		}
+	}
+
 	if ( /edge\//i.test( userAgent ) ) {
 		expected = expectedMap.edge;
 	} else if ( /(msie 10\.0|trident\/7\.0)/i.test( userAgent ) ) {
@ -328,8 +443,10 @@ testIframe(
 		expected = expectedMap.chrome;
 	} else if ( /\b(?:9|10)\.\d+(\.\d+)* safari/i.test( userAgent ) ) {
 		expected = expectedMap.safari_9_10;
-	} else if ( /firefox\/(?:4\d|5\d|60)/i.test( userAgent ) ) {
+	} else if ( /firefox\/[456]\d\b/i.test( userAgent ) ) {
 		expected = expectedMap.firefox_60;
+	} else if ( /firefox\/(?:[789]\d|102)\b/i.test( userAgent ) ) {
+		expected = expectedMap.firefox_102;
 	} else if ( /firefox/i.test( userAgent ) ) {
 		expected = expectedMap.firefox;
 	} else if ( /android 4\.[0-3]/i.test( userAgent ) ) {
@ -359,6 +476,15 @@ testIframe(
 			j++;
 		}

+		// Add an assertion per undefined support prop as it may
+		// not even exist on computedSupport but we still want to run
+		// the check.
+		for ( prop in expected ) {
+			if ( expected[ prop ] === undefined ) {
+				j++;
+			}
+		}
+
 		assert.expect( j );

 		for ( i in expected ) {
@ -387,6 +513,15 @@ testIframe(
 			i++;
 		}

+		// Add an assertion per undefined support prop as it may
+		// not even exist on computedSupport but we still want to run
+		// the check.
+		for ( prop in expected ) {
+			if ( expected[ prop ] === undefined ) {
+				i++;
+			}
+		}
+
 		assert.expect( i );

 		// Record all support props and the failing ones and ensure everyone
@ -394,7 +529,7 @@ testIframe(
 		for ( browserKey in expectedMap ) {
 			for ( supportTestName in expectedMap[ browserKey ] ) {
 				supportProps[ supportTestName ] = true;
-				if ( expectedMap[ browserKey ][ supportTestName ] !== true ) {
+				if ( !expectedMap[ browserKey ][ supportTestName ] ) {
 					failingSupportProps[ supportTestName ] = true;
 				}
 			}
--- a/test/unit/traversing.js
+++ b/test/unit/traversing.js
@ -13,7 +13,7 @@ QUnit.test( "find(String) under non-elements", function( assert ) {
 	assert.equal( j.find( "div" ).addBack().length, 3, "Check node,textnode,comment to find zero divs, but preserves pushStack" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "find(leading combinator)", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "find(leading combinator)", function( assert ) {
 	assert.expect( 4 );

 	assert.deepEqual( jQuery( "#qunit-fixture" ).find( "> div" ).get(), q( "foo", "nothiddendiv", "moretests", "tabindex-tests", "liveHandlerOrder", "siblingTest", "fx-test-group" ), "find child elements" );
@ -50,8 +50,24 @@ QUnit.test( "find(node|jQuery object)", function( assert ) {
 	assert.equal( $two.find( $foo[ 0 ] ).addBack().length, 2, "find preserves the pushStack, see trac-12009" );
 } );

-QUnit.test( "is(String|undefined)", function( assert ) {
-	assert.expect( 23 );
+QUnit.test( "is(falsy|invalid)", function( assert ) {
+	assert.expect( 5 );
+
+	assert.ok( !jQuery( "#foo" ).is( 0 ), "Expected false for an invalid expression - 0" );
+	assert.ok( !jQuery( "#foo" ).is( null ), "Expected false for an invalid expression - null" );
+	assert.ok( !jQuery( "#foo" ).is( "" ), "Expected false for an invalid expression - \"\"" );
+	assert.ok( !jQuery( "#foo" ).is( undefined ), "Expected false for an invalid expression - undefined" );
+	assert.ok( !jQuery( "#foo" ).is( { plain: "object" } ), "Check passing invalid object" );
+} );
+
+QUnit.test( "is(String)", function( assert ) {
+	assert.expect( 33 );
+
+	var link = document.getElementById( "simon1" ),
+		input = document.getElementById( "text1" ),
+		option = document.getElementById( "option1a" ),
+		disconnected = document.createElement( "div" );
+
 	assert.ok( jQuery( "#form" ).is( "form" ), "Check for element: A form must be a form" );
 	assert.ok( !jQuery( "#form" ).is( "div" ), "Check for element: A form is not a div" );
 	assert.ok( jQuery( "#mark" ).is( ".blog" ), "Check for class: Expected class 'blog'" );
@ -67,17 +83,56 @@ QUnit.test( "is(String|undefined)", function( assert ) {
 	assert.ok( jQuery( "#radio2" ).is( ":checked" ), "Check for pseudoclass: Expected to be checked" );
 	assert.ok( !jQuery( "#radio1" ).is( ":checked" ), "Check for pseudoclass: Expected not checked" );

-	assert.ok( !jQuery( "#foo" ).is( 0 ), "Expected false for an invalid expression - 0" );
-	assert.ok( !jQuery( "#foo" ).is( null ), "Expected false for an invalid expression - null" );
-	assert.ok( !jQuery( "#foo" ).is( "" ), "Expected false for an invalid expression - \"\"" );
-	assert.ok( !jQuery( "#foo" ).is( undefined ), "Expected false for an invalid expression - undefined" );
-	assert.ok( !jQuery( "#foo" ).is( { plain: "object" } ), "Check passing invalid object" );
-
 	// test is() with comma-separated expressions
 	assert.ok( jQuery( "#en" ).is( "[lang=\"en\"],[lang=\"de\"]" ), "Comma-separated; Check for lang attribute: Expect en or de" );
 	assert.ok( jQuery( "#en" ).is( "[lang=\"de\"],[lang=\"en\"]" ), "Comma-separated; Check for lang attribute: Expect en or de" );
 	assert.ok( jQuery( "#en" ).is( "[lang=\"en\"] , [lang=\"de\"]" ), "Comma-separated; Check for lang attribute: Expect en or de" );
 	assert.ok( jQuery( "#en" ).is( "[lang=\"de\"] , [lang=\"en\"]" ), "Comma-separated; Check for lang attribute: Expect en or de" );
+
+	link.title = "Don't click me";
+	assert.ok( jQuery( link ).is( "[rel='bookmark']" ), "attribute-equals string (delimited via apostrophes)" );
+	assert.ok( jQuery( link ).is( "[rel=bookmark]" ), "attribute-equals identifier" );
+	assert.ok( jQuery( link ).is( "[\nrel = bookmark\t]" ),
+		"attribute-equals identifier (whitespace ignored)" );
+	assert.ok( jQuery( link ).is( "a[title=\"Don't click me\"]" ),
+		"attribute-equals string containing single quote" );
+
+	// jQuery trac-12303
+	input.setAttribute( "data-pos", ":first" );
+	assert.ok( jQuery( input ).is( "input[data-pos=\\:first]" ),
+		"attribute-equals POS in identifier" );
+	assert.ok( jQuery( input ).is( "input[data-pos=':first']" ),
+		"attribute-equals POS in string" );
+
+	if ( QUnit.jQuerySelectors ) {
+		assert.ok( jQuery( input ).is( ":input[data-pos=':first']" ),
+			"attribute-equals POS in string after pseudo" );
+	} else {
+		assert.ok( "skip", ":input not supported in selector-native" );
+	}
+
+	option.setAttribute( "test", "" );
+	assert.ok( jQuery( option ).is( "[id=option1a]" ),
+		"id attribute-equals identifier" );
+
+	if ( QUnit.jQuerySelectors ) {
+		assert.ok( jQuery( option ).is( "[id*=option1][type!=checkbox]" ),
+			"attribute-not-equals identifier" );
+	} else {
+		assert.ok( "skip", "attribute-not-equals not supported in selector-native" );
+	}
+
+	assert.ok( jQuery( option ).is( "[id*=option1]" ), "attribute-contains identifier" );
+	assert.ok( !jQuery( option ).is( "[test^='']" ),
+		"attribute-starts-with empty string (negative)" );
+
+	option.className = "=]";
+	assert.ok( jQuery( option ).is( ".\\=\\]" ),
+		"class selector with attribute-equals confusable" );
+
+	assert.ok( jQuery( disconnected ).is( "div" ), "disconnected element" );
+	assert.ok( jQuery( link ).is( "* > *" ), "child combinator matches in document" );
+	assert.ok( !jQuery( disconnected ).is( "* > *" ), "child combinator fails in fragment" );
 } );

 QUnit.test( "is() against non-elements (trac-10178)", function( assert ) {
@ -130,7 +185,7 @@ QUnit.test( "is(jQuery)", function( assert ) {
 	assert.ok( !jQuery( "#simon" ).is( jQuery( ".blogTest" )[ 0 ] ), "Check for multiple classes: Expected classes 'blog' and 'link', but not 'blogTest'" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "is() with :has() selectors", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "is() with :has() selectors", function( assert ) {
 	assert.expect( 6 );

 	assert.ok( jQuery( "#foo" ).is( ":has(p)" ), "Check for child: Expected a child 'p' element" );
@ -142,7 +197,7 @@ QUnit[ jQuery.find.compile ? "test" : "skip" ]( "is() with :has() selectors", fu
 	assert.ok( !jQuery( "#foo" ).is( jQuery( "div:has(ul)" ) ), "Check for child: Did not expect 'ul' element" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "is() with positional selectors", function( assert ) {
+QUnit[ QUnit.jQuerySelectorsPos ? "test" : "skip" ]( "is() with positional selectors", function( assert ) {
 	assert.expect( 27 );

 	var
@ -279,7 +334,7 @@ QUnit.test( "filter(jQuery)", function( assert ) {
 	assert.deepEqual( jQuery( "#form input" ).filter( elements ).get(), q( "text1" ), "filter(Element)" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "filter() with positional selectors", function( assert ) {
+QUnit[ QUnit.jQuerySelectorsPos ? "test" : "skip" ]( "filter() with positional selectors", function( assert ) {
 	assert.expect( 19 );

 	var filterit = function( sel, filter, length ) {
@ -360,7 +415,7 @@ QUnit.test( "closest()", function( assert ) {
 	assert.deepEqual( jq.contents().closest( "*" ).get(), jq.get(), "Text node input (trac-13332)" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "closest() with positional selectors", function( assert ) {
+QUnit[ QUnit.jQuerySelectorsPos ? "test" : "skip" ]( "closest() with positional selectors", function( assert ) {
 	assert.expect( 3 );

 	assert.deepEqual( jQuery( "#qunit-fixture" ).closest( "div:first" ).get(), [],
@ -390,7 +445,7 @@ QUnit.test( "closest(jQuery)", function( assert ) {
 	assert.ok( $child.closest( $body.add( $parent ) ).is( "#nothiddendiv" ), "Closest ancestor retrieved." );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "not(Selector)", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "not(Selector)", function( assert ) {
 	assert.expect( 7 );
 	assert.equal( jQuery( "#qunit-fixture > p#ap > a" ).not( "#google" ).length, 2, "not('selector')" );

@ -470,7 +525,7 @@ QUnit.test( "not(jQuery)", function( assert ) {
 	);
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "not(Selector) excludes non-element nodes (gh-2808)", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "not(Selector) excludes non-element nodes (gh-2808)", function( assert ) {
 	assert.expect( 3 );

 	var mixedContents = jQuery( "#nonnodes" ).contents(),
@ -561,7 +616,11 @@ QUnit.test( "siblings([String])", function( assert ) {
 	assert.expect( 6 );
 	assert.deepEqual( jQuery( "#en" ).siblings().get(), q( "sndp", "sap" ), "Check for siblings" );
 	assert.deepEqual( jQuery( "#nonnodes" ).contents().eq( 1 ).siblings().get(), q( "nonnodesElement" ), "Check for text node siblings" );
-	assert.deepEqual( jQuery( "#foo" ).siblings( "form, b" ).get(), q( "form", "floatTest", "lengthtest", "name-tests", "testForm" ), "Check for multiple filters" );
+	assert.deepEqual(
+		jQuery( "#foo" ).siblings( "form, b" ).get(),
+		q( "form", "floatTest", "lengthtest", "name-tests", "testForm", "disabled-tests" ),
+		"Check for multiple filters"
+	);

 	var set = q( "sndp", "en", "sap" );
 	assert.deepEqual( jQuery( "#en, #sndp" ).siblings().get(), set, "Check for unique results from siblings" );
@ -569,7 +628,7 @@ QUnit.test( "siblings([String])", function( assert ) {
 	assert.equal( jQuery( "<a></a>" ).siblings().length, 0, "Detached elements have no siblings (trac-11370)" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "siblings([String])", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "siblings([String])", function( assert ) {
 	assert.expect( 2 );
 	assert.deepEqual( jQuery( "#sndp" ).siblings( ":has(code)" ).get(), q( "sap" ), "Check for filtered siblings (has code child element)" );
 	assert.deepEqual( jQuery( "#sndp" ).siblings( ":has(a)" ).get(), q( "en", "sap" ), "Check for filtered siblings (has anchor child element)" );
@ -581,7 +640,7 @@ QUnit.test( "children([String])", function( assert ) {
 	assert.deepEqual( jQuery( "#foo" ).children( "#en, #sap" ).get(), q( "en", "sap" ), "Check for multiple filters" );
 } );

-QUnit[ jQuery.find.compile ? "test" : "skip" ]( "children([String])", function( assert ) {
+QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "children([String])", function( assert ) {
 	assert.expect( 1 );
 	assert.deepEqual( jQuery( "#foo" ).children( ":has(code)" ).get(), q( "sndp", "sap" ), "Check for filtered children" );
 } );