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sanitize.css

(★ 5,300)

A best-practices CSS foundation

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.editorconfig
.gitignore
.travis.yml
assets.css
CHANGELOG.md
CONTRIBUTING.md
forms.css
LICENSE.md
package.json
README.md
reduce-motion.css
sanitize.css
SECURITY.md
system-ui.css
typography.css
ui-monospace.css

# Installation Guide

1. Get the code

git clone https://github.com/csstools/sanitize.css

Downloads the entire project code from GitHub to your computer.

cd sanitize.css

Moves into the project folder you just downloaded.

2. Node.js

Easy Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Node.js Node.js must be installed to use npm. The LTS version is recommended.

npm install sanitize.css --save

Downloads and installs the libraries listed in package.json.

✅ After running the command, open the address shown in the terminal (usually something like http://localhost:3000) in your browser.

Pulled directly from this repo's README.

// repository documentation

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# sanitize.css [<img src="https://csstools.github.io/sanitize.css/logo.svg" alt="sanitize" width="90" height="90" align="right">][sanitize.css]

[sanitize.css] is a CSS library that provides consistent, cross-browser
default styling of HTML elements alongside useful defaults.

**sanitize.css** is developed alongside [normalize.css], which means every
normalization is included, and every normalization and opinion are clearly
marked and documented.

**sanitize.css** wraps styles in zero-specificity selectors using `:where()`.

## Usage

```html
<link href="https://cdn.skypack.dev/sanitize.css" rel="stylesheet" />
```

[Learn more about `sanitize.css`](#features).

#### Forms CSS

A separate stylesheet that normalizes form controls without side effects.

```html
<link href="https://unpkg.com/sanitize.css/forms.css" rel="stylesheet" />
```

[Learn more about `forms.css`](#forms).

#### Assets CSS

A separate stylesheet that applies a comfortable measure to plain documents.

```html
<link href="https://unpkg.com/sanitize.css/assets.css" rel="stylesheet" />
```

[Learn more about `assets.css`](#assets).

#### Typography CSS

A separate stylesheet that normalizes typography using system interface fonts.

```html
<link href="https://unpkg.com/sanitize.css/typography.css" rel="stylesheet" />
```

[Learn more about `typography.css`](#typography).

#### Reduce Motion CSS

A separate stylesheet for restricting motion when the user has requested this at system level.

```html
<link href="https://unpkg.com/sanitize.css/reduce-motion.css" rel="stylesheet" />
```

[Learn more about `reduce-motion.css`](#reduce-motion).

#### System-UI

A separate stylesheet that adds support for using `system-ui` in Firefox.

```html
<link href="https://unpkg.com/sanitize.css/system-ui.css" rel="stylesheet" />
```

#### UI-Monospace

A separate stylesheet that adds support for using `ui-monospace` in Chrome, Edge, and Firefox.

```html
<link href="https://unpkg.com/sanitize.css/ui-monospace.css" rel="stylesheet" />
```

## Install

```sh
npm install sanitize.css --save
```

#### Webpack Usage

Import [sanitize.css] in CSS:

```css
@import '~sanitize.css';
@import '~sanitize.css/forms.css';
@import '~sanitize.css/typography.css';
```

Alternatively, import [sanitize.css] in JS:

```js
import 'sanitize.css';
import 'sanitize.css/forms.css';
import 'sanitize.css/typography.css';
```

In `webpack.config.js`, be sure to use the appropriate loaders:

```js
module.exports = {
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [ 'style-loader', 'css-loader' ]
      }
    ]
  }
}
```

**Download**

See https://csstools.github.io/sanitize.css/latest/sanitize.css

## What does it do?

* Normalizes styles for a wide range of elements.
* Corrects bugs and common browser inconsistencies.
* Provides common, useful defaults.
* Explains what code does using detailed comments.

## Browser support

* Chrome (last 2)
* Edge (last 2)
* Firefox (last 2)
* Firefox ESR
* Opera (last 2)
* Safari (last 2)
* iOS Safari (last 2)
* Internet Explorer 9+

## Differences

[normalize.css] and [sanitize.css] correct browser bugs while carefully testing
and documenting changes. normalize.css styles adhere to css specifications.
sanitize.css styles adhere to common developer expectations and preferences.
[reset.css] unstyles all elements. Both sanitize.css and normalize.css are
maintained in sync.

## Features

##### Box sizing defaults to border-box

```css
*, ::before, ::after {
  box-sizing: border-box;
}
```

##### Backgrounds do not repeat by default

```css
*, ::before, ::after {
  background-repeat: no-repeat;
}
```

##### Pseudo-elements inherit text decoration and vertical alignment

```css
::before,
::after {
  text-decoration: inherit;
  vertical-align: inherit;
}
```

##### Cursors only change to hint non-obvious interfaces

```css
html {
  cursor: default;
}
```

##### Text has a comfortable line height in all browsers

```css
html {
  line-height: 1.5;
}
```

##### Tabs appear the same on the web as in a typical editor

```css
html {
  tab-size: 4;
}
```

##### Words break to prevent overflow

```css
html {
  word-break: break-all;
}
```

##### Documents do not use a margin for outer padding

```css
body {
  margin: 0;
}
```

##### Navigation lists do not include a marker style

```css
nav ol, nav ul {
  list-style: none;
  padding: 0;
}
```

##### Media elements align to the text center of other content

```css
audio, canvas, iframe, img, svg, video {
  vertical-align: middle;
}
```

##### SVGs fallback to the current text color

```css
svg:not([fill]) {
  fill: currentColor;
}
```

##### Tables do not include additional border spacing

```css
table {
  border-collapse: collapse;
}
```

##### Textareas only resize vertically by default

```css
textarea {
  resize: vertical;
}
```

##### Single taps are dispatched immediately on clickable elements

```css
a, area, button, input, label, select, summary, textarea, [tabindex] {
  -ms-touch-action: manipulation;
  touch-action: manipulation;
}
```

##### ARIA roles include visual cursor hints

```css
[aria-busy="true"] {
  cursor: progress;
}

[aria-controls] {
  cursor: pointer;
}

[aria-disabled="true"], [disabled] {
  cursor: default;
}
```

##### Visually hidden content remains accessible

```css
[aria-hidden="false"][hidden] {
  display: initial;
}

[aria-hidden="false"][hidden]:not(:focus) {
  clip: rect(0, 0, 0, 0);
  position: absolute;
}
```

---

## Forms

[sanitize.css] includes a separate stylesheet for normalizing forms using
minimal, standards-like styling.

```html
<link href="https://unpkg.com/sanitize.css" rel="stylesheet" />
<link href="https://unpkg.com/sanitize.css/forms.css" rel="stylesheet" />
```

### Forms Features

##### Form controls appear visually consistent and restyle consistently

```css
button, input, select, textarea {
  background-color: transparent;
  border: 1px solid WindowFrame;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  padding: 0.25em 0.375em;
}

[type="color"],
[type="range"] {
  border-width: 0;
  padding: 0;
}
```

##### Expandable select controls appear visually consistent

```css
select {
  -moz-appearance: none;
  -webkit-appearance: none;
  background: no-repeat right center / 1em;
  border-radius: 0;
  padding-right: 1em;
}

select:not([multiple]):not([size]) {
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='4'%3E%3Cpath d='M4 0h6L7 4'/%3E%3C/svg%3E");
}

::-ms-expand {
  display: none;
}
```

##### Placeholders appear visually consistent in Internet Explorer

```css
:-ms-input-placeholder {
  color: rgba(0, 0, 0, 0.54);
}
```

## Assets

[sanitize.css] includes a separate stylesheet for normalizing restricting the
size of assets in all browsers.

```html
<link href="https://unpkg.com/sanitize.css" rel="stylesheet" />
<link href="https://unpkg.com/sanitize.css/assets.css" rel="stylesheet" />
```

### Assets Features

##### Assets use a comfortable measure in all browsers

```css
iframe,
img,
input,
select,
textarea {
  height: auto;
  max-width: 100%;
}
```

## Typography

[sanitize.css] includes a separate stylesheet for normalizing typography using
system interface fonts.

```html
<link href="https://unpkg.com/sanitize.css" rel="stylesheet" />
<link href="https://unpkg.com/sanitize.css/typography.css" rel="stylesheet" />
```

### Typography Features

##### Typography uses the default system font

```css
html {
  font-family:
    system-ui,
    /* macOS 10.11-10.12 */ -apple-system,
    /* Windows 6+ */ Segoe UI,
    /* Android 4+ */ Roboto,
    /* Ubuntu 10.10+ */ Ubuntu,
    /* Gnome 3+ */ Cantarell,
    /* KDE Plasma 5+ */ Noto Sans,
    /* fallback */ sans-serif,
    /* macOS emoji */ "Apple Color Emoji",
    /* Windows emoji */ "Segoe UI Emoji",
    /* Windows emoji */ "Segoe UI Symbol",
    /* Linux emoji */ "Noto Color Emoji";
}
```

##### Pre-formatted and code-formatted text uses the monospace system font

```css
code, kbd, pre, samp {
  font-family:
    /* macOS 10.10+ */ Menlo,
    /* Windows 6+ */ Consolas,
    /* Android 4+ */ Roboto Mono,
    /* Ubuntu 10.10+ */ Ubuntu Monospace,
    /* KDE Plasma 5+ */ Noto Mono,
    /* KDE Plasma 4+ */ Oxygen Mono,
    /* Linux/OpenOffice fallback */ Liberation Mono,
    /* fallback */ monospace;
}
```

## Reduce Motion

[sanitize.css] includes a separate stylesheet for restricting motion when the
user has requested this at a system level.

```html
<link href="https://unpkg.com/sanitize.css" rel="stylesheet" />
<link href="https://unpkg.com/sanitize.css/reduce-motion.css" rel="stylesheet" />
```

### Reduce Motion Features

##### Animations, scrolling effects, transitions and view transitions are reduced in all browsers

```css
@media (prefers-reduced-motion: reduce) {
  *,
  ::before,
  ::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    background-attachment: initial !important;
    scroll-behavior: auto !important;
    transition-delay: 0s !important;
    transition-duration: 0s !important;
  }

@view-transition {
    navigation: none !important;
  }
}
```

## Contributing

Please read the [contribution guidelines](CONTRIBUTING.md) in order to make the
contribution process easy and effective for everyone involved.

## Acknowledgements

sanitize.css is a project by [Jonathan Neal](https://github.com/jonathantneal),
built upon normalize.css, a project by
[Jonathan Neal](https://github.com/jonathantneal),
co-created with [Nicolas Gallagher](https://github.com/necolas).

[normalize.css]: https://github.com/csstools/normalize.css
[reset.css]: http://meyerweb.com/eric/tools/css/reset/
[sanitize.css]: https://github.com/csstools/sanitize.css