mirror of
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133 lines
4.2 KiB
Markdown
133 lines
4.2 KiB
Markdown
# normalize.css
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<a href="https://github.com/necolas/normalize.css"><img
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src="https://necolas.github.io/normalize.css/logo.svg" alt="Normalize Logo"
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width="80" height="80" align="right"></a>
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> A modern alternative to CSS resets
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[![npm][npm-image]][npm-url] [![license][license-image]][license-url]
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[![changelog][changelog-image]][changelog-url]
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[![gitter][gitter-image]][gitter-url]
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**NPM**
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```sh
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npm install --save normalize.css
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```
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**Bower**
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```sh
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bower install --save normalize-css
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```
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**CDN**
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See https://cdnjs.com/libraries/normalize
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**Download**
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See https://necolas.github.io/normalize.css/latest/normalize.css
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## What does it do?
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* Preserves useful defaults, unlike many CSS resets.
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* Normalizes styles for a wide range of elements.
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* Corrects bugs and common browser inconsistencies.
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* Improves usability with subtle modifications.
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* Explains what code does using detailed comments.
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## Browser support
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* Chrome (last two)
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* Edge (last two)
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* Firefox (last two)
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* Firefox ESR
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* Internet Explorer 8+
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* Opera (last two)
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* Safari 6+
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*[Normalize.css v1 provides legacy browser support]
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(https://github.com/necolas/normalize.css/tree/v1) (IE 6+, Safari 4+),
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but is no longer actively developed.*
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## Extended details and known issues
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Additional detail and explanation of the esoteric parts of normalize.css.
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#### `pre, code, kbd, samp`
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The `font-family: monospace, monospace` hack fixes the inheritance and scaling
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of font-size for preformatted text. The duplication of `monospace` is
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intentional. [Source](https://en.wikipedia.org/wiki/User:Davidgothberg/Test59).
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#### `sub, sup`
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Normally, using `sub` or `sup` affects the line-box height of text in all
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browsers. [Source](https://gist.github.com/413930).
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#### `svg:not(:root)`
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Adding `overflow: hidden` fixes IE9's SVG rendering. Earlier versions of IE
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don't support SVG, so we can safely use the `:not()` and `:root` selectors that
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modern browsers use in the default UA stylesheets to apply this style. [Source]
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(https://lists.w3.org/Archives/Public/public-svg-wg/2008JulSep/0339.html).
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#### `select`
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By default, Chrome on OS X and Safari on OS X allow very limited styling of
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`select`, unless a border property is set. The default font weight on `optgroup`
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elements cannot safely be changed in Chrome on OSX and Safari on OS X.
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#### `[type="checkbox"]`
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It is recommended that you do not style checkbox and radio inputs as Firefox's
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implementation does not respect box-sizing, padding, or width.
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#### `[type="number"]`
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Certain font size values applied to number inputs cause the cursor style of the
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decrement button to change from `default` to `text`.
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#### `[type="search"]`
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The search input is not fully stylable by default. In Chrome and Safari on
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OSX/iOS you can't control `font`, `padding`, `border`, or `background`. In
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Chrome and Safari on Windows you can't control `border` properly. It will apply
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`border-width` but will only show a border color (which cannot be controlled)
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for the outer 1px of that border. Applying `-webkit-appearance: textfield`
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addresses these issues without removing the benefits of search inputs (e.g.
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showing past searches). Safari (but not Chrome) will clip the cancel button on
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when it has padding (and `textfield` appearance).
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#### `::placeholder`
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In Edge, placeholders will disappear on `relative` or `absolute` positioned
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`<input>` elements if you use `opacity` less than `1` due to a [bug](https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/3901363/).
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## Contributing
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Please read the [contribution guidelines](CONTRIBUTING.md) in order to make the
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contribution process easy and effective for everyone involved.
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## Acknowledgements
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Normalize.css is a project by [Nicolas Gallagher](https://github.com/necolas),
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co-created with [Jonathan Neal](https://github.com/jonathantneal).
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[changelog-image]: https://img.shields.io/badge/changelog-md-blue.svg?style=flat-square
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[changelog-url]: CHANGELOG.md
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[license-image]: https://img.shields.io/npm/l/normalize.css.svg?style=flat-square
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[license-url]: LICENSE.md
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[npm-image]: https://img.shields.io/npm/v/normalize.css.svg?style=flat-square
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[npm-url]: https://www.npmjs.com/package/normalize.css
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[gitter-image]: https://img.shields.io/badge/chat-gitter-blue.svg?style=flat-square
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[gitter-url]: https://gitter.im/necolas/normalize.css
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