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Unified the formatting of core.js. === or !== are used wherever appropriate, syntax has been normalized, braces are added in all cases, and jQuery() now returns an empty set.

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This commit is contained in:
John Resig 2009-03-31 17:35:20 +00:00
parent 2937d645cb
commit 2764127335
2 changed files with 139 additions and 97 deletions
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234
src/core.js
View File

@ -1,13 +1,21 @@
var
// Will speed up references to window, and allows munging its name.
window = this,
// Will speed up references to window, and allows munging its name.
var window = this,
// Will speed up references to undefined, and allows munging its name.
undefined,
// Map over jQuery in case of overwrite
_jQuery = window.jQuery,
// Map over the $ in case of overwrite
_$ = window.$,
// Define a local copy of jQuery
jQuery,
// A central reference to the root jQuery(document)
rootjQuery,
jQuery = window.jQuery = window.$ = function( selector, context ) {
// The jQuery object is actually just the init constructor 'enhanced'
return selector === undefined ?
@ -18,12 +26,27 @@ var
// A simple way to check for HTML strings or ID strings
// (both of which we optimize for)
quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
// Is it a simple selector
isSimple = /^.[^:#\[\.,]*$/;
isSimple = /^.[^:#\[\.,]*$/,
// Keep a UserAgent string for use with jQuery.browser
userAgent = navigator.userAgent.toLowerCase(),
// Save a reference to the core toString method
toString = Object.prototype.toString;
// Define the main jQuery method
jQuery = window.jQuery = window.$ = function( selector, context ) {
// The jQuery object is actually just the init constructor 'enhanced'
return new jQuery.fn.init( selector, context );
};
jQuery.fn = jQuery.prototype = {
init: function( selector, context ) {
// Handle $("") or $(null)
var match, elem, ret;
// Handle $(""), $(null), or $(undefined)
if ( !selector ) {
this.length = 0;
return this;
@ -40,7 +63,7 @@ jQuery.fn = jQuery.prototype = {
// Handle HTML strings
if ( typeof selector === "string" ) {
// Are we dealing with HTML string or an ID?
var match = quickExpr.exec( selector );
match = quickExpr.exec( selector );
// Verify a match, and that no context was specified for #id
if ( match && (match[1] || !context) ) {
@ -51,16 +74,16 @@ jQuery.fn = jQuery.prototype = {
// HANDLE: $("#id")
} else {
var elem = document.getElementById( match[3] );
elem = document.getElementById( match[3] );
// Handle the case where IE and Opera return items
// by name instead of ID
if ( elem && elem.id != match[3] ) {
if ( elem && elem.id !== match[3] ) {
return rootjQuery.find( selector );
}
// Otherwise, we inject the element directly into the jQuery object
var ret = jQuery( elem || null );
ret = jQuery( elem || null );
ret.context = document;
ret.selector = selector;
return ret;
@ -107,7 +130,7 @@ jQuery.fn = jQuery.prototype = {
// Get the Nth element in the matched element set OR
// Get the whole matched element set as a clean array
get: function( num ) {
return num === undefined ?
return num == null ?
// Return a 'clean' array
Array.prototype.slice.call( this ) :
@ -127,10 +150,11 @@ jQuery.fn = jQuery.prototype = {
ret.context = this.context;
if ( name === "find" )
if ( name === "find" ) {
ret.selector = this.selector + (this.selector ? " " : "") + selector;
else if ( name )
} else if ( name ) {
ret.selector = this.selector + "." + name + "(" + selector + ")";
}
// Return the newly-formed element set
return ret;
@ -161,8 +185,7 @@ jQuery.fn = jQuery.prototype = {
// Locate the position of the desired element
return jQuery.inArray(
// If it receives a jQuery object, the first element is used
elem && elem.jquery ? elem[0] : elem
, this );
elem && elem.jquery ? elem[0] : elem, this );
},
is: function( selector ) {
@ -179,28 +202,9 @@ jQuery.fn = jQuery.prototype = {
// Give the init function the jQuery prototype for later instantiation
jQuery.fn.init.prototype = jQuery.fn;
function evalScript( i, elem ) {
if ( elem.src )
jQuery.ajax({
url: elem.src,
async: false,
dataType: "script"
});
else
jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
if ( elem.parentNode )
elem.parentNode.removeChild( elem );
}
function now(){
return +new Date;
}
jQuery.extend = jQuery.fn.extend = function() {
// copy reference to target object
var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options, name, src, copy;
// Handle a deep copy situation
if ( typeof target === "boolean" ) {
@ -211,51 +215,54 @@ jQuery.extend = jQuery.fn.extend = function() {
}
// Handle case when target is a string or something (possible in deep copy)
if ( typeof target !== "object" && !jQuery.isFunction(target) )
if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
target = {};
}
// extend jQuery itself if only one argument is passed
if ( length == i ) {
if ( length === i ) {
target = this;
--i;
}
for ( ; i < length; i++ )
for ( ; i < length; i++ ) {
// Only deal with non-null/undefined values
if ( (options = arguments[ i ]) != null )
if ( (options = arguments[ i ]) != null ) {
// Extend the base object
for ( var name in options ) {
var src = target[ name ], copy = options[ name ];
for ( name in options ) {
src = target[ name ];
copy = options[ name ];
// Prevent never-ending loop
if ( target === copy )
if ( target === copy ) {
continue;
}
// Recurse if we're merging object values
if ( deep && copy && typeof copy === "object" && !copy.nodeType )
if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
target[ name ] = jQuery.extend( deep,
// Never move original objects, clone them
src || ( copy.length != null ? [ ] : { } )
, copy );
src || ( copy.length != null ? [ ] : { } ), copy );
// Don't bring in undefined values
else if ( copy !== undefined )
} else if ( copy !== undefined ) {
target[ name ] = copy;
}
}
}
}
// Return the modified object
return target;
};
var toString = Object.prototype.toString;
jQuery.extend({
noConflict: function( deep ) {
window.$ = _$;
if ( deep )
if ( deep ) {
window.jQuery = _jQuery;
}
return jQuery;
},
@ -286,10 +293,11 @@ jQuery.extend({
script = document.createElement("script");
script.type = "text/javascript";
if ( jQuery.support.scriptEval )
if ( jQuery.support.scriptEval ) {
script.appendChild( document.createTextNode( data ) );
else
} else {
script.text = data;
}
// Use insertBefore instead of appendChild to circumvent an IE6 bug.
// This arises when a base node is used (#2709).
@ -299,7 +307,7 @@ jQuery.extend({
},
nodeName: function( elem, name ) {
return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
},
// args is for internal usage only
@ -308,23 +316,31 @@ jQuery.extend({
if ( args ) {
if ( length === undefined ) {
for ( name in object )
if ( callback.apply( object[ name ], args ) === false )
for ( name in object ) {
if ( callback.apply( object[ name ], args ) === false ) {
break;
} else
for ( ; i < length; )
if ( callback.apply( object[ i++ ], args ) === false )
}
}
} else {
for ( ; i < length; ) {
if ( callback.apply( object[ i++ ], args ) === false ) {
break;
}
}
}
// A special, fast, case for the most common use of each
} else {
if ( length === undefined ) {
for ( name in object )
if ( callback.call( object[ name ], name, object[ name ] ) === false )
for ( name in object ) {
if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
break;
} else
}
}
} else {
for ( var value = object[0];
i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
}
}
return object;
@ -335,26 +351,30 @@ jQuery.extend({
},
makeArray: function( array ) {
var ret = [];
var ret = [], i;
if( array != null ){
var i = array.length;
if ( array != null ) {
i = array.length;
// The window, strings (and functions) also have 'length'
if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
if ( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval ) {
ret[0] = array;
else
while( i )
} else {
while ( i ) {
ret[--i] = array[i];
}
}
}
return ret;
},
inArray: function( elem, array ) {
for ( var i = 0, length = array.length; i < length; i++ )
// Use === because on IE, window == document
if ( array[ i ] === elem )
for ( var i = 0, length = array.length; i < length; i++ ) {
if ( array[ i ] === elem ) {
return i;
}
}
return -1;
},
@ -363,34 +383,37 @@ jQuery.extend({
// We have to loop this way because IE & Opera overwrite the length
// expando of getElementsByTagName
var i = 0, elem, pos = first.length;
// Also, we need to make sure that the correct elements are being returned
// (IE returns comment nodes in a '*' query)
if ( !jQuery.support.getAll ) {
while ( (elem = second[ i++ ]) != null )
if ( elem.nodeType != 8 )
while ( (elem = second[ i++ ]) != null ) {
if ( elem.nodeType !== 8 ) {
first[ pos++ ] = elem;
}
}
} else
while ( (elem = second[ i++ ]) != null )
} else {
while ( (elem = second[ i++ ]) != null ) {
first[ pos++ ] = elem;
}
}
return first;
},
unique: function( array ) {
var ret = [], done = {};
var ret = [], done = {}, id;
try {
for ( var i = 0, length = array.length; i < length; i++ ) {
var id = jQuery.data( array[ i ] );
id = jQuery.data( array[ i ] );
if ( !done[ id ] ) {
done[ id ] = true;
ret.push( array[ i ] );
}
}
} catch( e ) {
ret = array;
}
@ -403,43 +426,62 @@ jQuery.extend({
// Go through the array, only saving the items
// that pass the validator function
for ( var i = 0, length = elems.length; i < length; i++ )
if ( !inv != !callback( elems[ i ], i ) )
for ( var i = 0, length = elems.length; i < length; i++ ) {
if ( !inv !== !callback( elems[ i ], i ) ) {
ret.push( elems[ i ] );
}
}
return ret;
},
map: function( elems, callback ) {
var ret = [];
var ret = [], value;
// Go through the array, translating each of the items to their
// new value (or values).
for ( var i = 0, length = elems.length; i < length; i++ ) {
var value = callback( elems[ i ], i );
value = callback( elems[ i ], i );
if ( value != null )
if ( value != null ) {
ret[ ret.length ] = value;
}
}
return ret.concat.apply( [], ret );
},
// Use of jQuery.browser is deprecated.
// It's included for backwards compatibility and plugins,
// although they should work to migrate away.
browser: {
version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
safari: /webkit/.test( userAgent ),
opera: /opera/.test( userAgent ),
msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
}
});
// All jQuery objects should point back to these
var rootjQuery = jQuery(document);
rootjQuery = jQuery(document);
// Use of jQuery.browser is deprecated.
// It's included for backwards compatibility and plugins,
// although they should work to migrate away.
function evalScript( i, elem ) {
if ( elem.src ) {
jQuery.ajax({
url: elem.src,
async: false,
dataType: "script"
});
} else {
jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
}
var userAgent = navigator.userAgent.toLowerCase();
if ( elem.parentNode ) {
elem.parentNode.removeChild( elem );
}
}
// Figure out what browser is being used
jQuery.browser = {
version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
safari: /webkit/.test( userAgent ),
opera: /opera/.test( userAgent ),
msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
};
function now() {
return (new Date).getTime();
}

2
test/unit/core.js
View File

@ -59,7 +59,7 @@ test("selector state", function() {
test = jQuery();
equals( test.selector, "", "Empty jQuery Selector" );
equals( test.context, document, "Empty jQuery Context" );
equals( test.context, undefined, "Empty jQuery Context" );
test = jQuery(document);
equals( test.selector, "", "Document Selector" );