215 lines
12 KiB
Markdown
215 lines
12 KiB
Markdown
# rtl-css-js
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RTL conversion for CSS in JS objects
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<!-- prettier-ignore-start -->
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[![Build Status][build-badge]][build]
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[![Code Coverage][coverage-badge]][coverage]
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[![version][version-badge]][package]
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[![downloads][downloads-badge]][npmtrends]
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[![MIT License][license-badge]][license]
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[![All Contributors][all-contributors-badge]](#contributors-)
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[![PRs Welcome][prs-badge]][prs]
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[![Code of Conduct][coc-badge]][coc]
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<!-- prettier-ignore-end -->
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## The problem
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For some locales, it's necessary to change `padding-left` to `padding-right`
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when your text direction is right to left. There are tools like this for CSS
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([`cssjanus`](https://github.com/cssjanus/cssjanus) for example) which
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manipulate strings of CSS to do this, but none for CSS in JS where your CSS is
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represented by an object.
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## This solution
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This is a function which accepts a CSS in JS object and can convert
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`padding-left` to `padding-right` as well as all other properties where it makes
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sense to do that (at least, that's what it's going to be when it's done... This
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is a work in progress).
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## Table of Contentss
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<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
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- [Installation](#installation)
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- [Usage](#usage)
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- [kebab-case](#kebab-case)
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- [core](#core)
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- [Caveats](#caveats)
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- [`background`](#background)
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- [CSS variables - `var()`](#css-variables---var)
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- [Inspiration](#inspiration)
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- [Ecosystem](#ecosystem)
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- [Other Solutions](#other-solutions)
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- [Contributors](#contributors)
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- [LICENSE](#license)
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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## Installation
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This module is distributed via [npm][npm] which is bundled with [node][node] and
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should be installed as one of your project's `dependencies`:
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```
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npm install --save rtl-css-js
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```
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## Usage
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This module is exposed via [CommonJS](http://wiki.commonjs.org/wiki/CommonJS) as
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well as [UMD](https://github.com/umdjs/umd) with the global as `rtlCSSJS`
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CommonJS:
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```javascript
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const rtlCSSJS = require('rtl-css-js')
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const styles = rtlCSSJS({paddingLeft: 23})
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console.log(styles) // logs {paddingRight: 23}
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```
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You can also just include a script tag in your browser and use the `rtlCSSJS`
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variable:
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```html
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<script src="https://unpkg.com/rtl-css-js"></script>
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<script>
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const styles = rtlCSSJS({paddingRight: 23})
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console.log(styles) // logs {paddingLeft: 23}
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</script>
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```
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You can also control which rules you don't want to flip by adding a
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`/* @noflip */` CSS comment to your rule
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```javascript
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const rtlCSSJS = require('rtl-css-js')
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const styles = rtlCSSJS({paddingLeft: '20px /* @noflip */'})
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console.log(styles) // logs {paddingLeft: '20px /* @noflip */' }
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```
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### kebab-case
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This library support kebab-case properties too.
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```javascript
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const rtlCSSJS = require('rtl-css-js')
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const styles = rtlCSSJS({'padding-right': 23})
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console.log(styles) // logs {'padding-left': 23}
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```
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### core
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`rtl-css-js` also exposes its internal helpers and utilities so you can deal
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with [certain scenarios](https://github.com/kentcdodds/rtl-css-js/pull/22)
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yourself. To use these you can use the `rtlCSSJSCore` global with the UMD build,
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`require('rtl-css-js/core')`, or use
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`import {propertyValueConverters, arrayToObject} from 'rtl-css-js/core'`.
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You can import anything that's exported from `src/core`. Please see the code
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comments for documentation on how to use these.
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## Caveats
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### `background`
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Right now `background` and `backgroundImage` just replace all instances of `ltr`
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with `rtl` and `right` with `left`. This is so you can have a different image
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for your LTR and RTL, and in order to flip linear gradients. Note that this is
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case sensitive! Must be lower case. Note also that it _will not_ change `bright`
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to `bleft`. It's a _little_ smarter than that. But this is definitely something
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to consider with your URLs.
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### CSS variables - `var()`
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Since it's impossible to know what the contents of a css variable are until the
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styles are actually calculated by the browser, any CSS variable contents will
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not be converted.
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## Inspiration
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[CSSJanus](https://github.com/cssjanus/cssjanus) was a major inspiration.
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## Ecosystem
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- **[react-with-styles-interface-aphrodite](https://github.com/airbnb/react-with-styles-interface-aphrodite):**
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An interface to use
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[`react-with-styles`](https://github.com/airbnb/react-with-styles) with
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[Aphrodite](https://github.com/khan/aphrodite)
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- **[fela-plugin-rtl](https://www.npmjs.com/package/fela-plugin-rtl):** A plugin
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for [fela](http://fela.js.org/) that uses rtl-css-js to convert a style object
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to its right-to-left counterpart
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- **[bidi-css-js](https://github.com/TxHawks/bidi-css-js):** A library for
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authoring flow-relative css, which uses `rtl-css-js`'s core.
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- **[jss-rtl](https://github.com/alitaheri/jss-rtl):** A plugin for
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[`jss`](https://github.com/cssinjs/jss) to support flipping styles
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dynamically.
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## Other Solutions
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I'm not aware of any, if you are please
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[make a pull request](http://makeapullrequest.com) and add it here!
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## Contributors
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Thanks goes to these people ([emoji key][emojis]):
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<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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<!-- prettier-ignore-start -->
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<!-- markdownlint-disable -->
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<table>
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<tr>
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<td align="center"><a href="https://kentcdodds.com"><img src="https://avatars.githubusercontent.com/u/1500684?v=3?s=100" width="100px;" alt=""/><br /><sub><b>Kent C. Dodds</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=kentcdodds" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=kentcdodds" title="Tests">⚠️</a> <a href="#infra-kentcdodds" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
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<td align="center"><a href="https://gabri.me"><img src="https://avatars.githubusercontent.com/u/63876?v=3?s=100" width="100px;" alt=""/><br /><sub><b>Ahmed El Gabri</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=ahmedelgabri" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=ahmedelgabri" title="Documentation">📖</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=ahmedelgabri" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://github.com/majapw"><img src="https://avatars1.githubusercontent.com/u/1383861?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Maja Wichrowska</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=majapw" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=majapw" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://github.com/yzimet"><img src="https://avatars2.githubusercontent.com/u/6600720?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Yaniv</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=yzimet" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=yzimet" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://github.com/TxHawks"><img src="https://avatars2.githubusercontent.com/u/5658514?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jonathan Pollak</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=TxHawks" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=TxHawks" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://github.com/alitaheri"><img src="https://avatars1.githubusercontent.com/u/8528759?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ali Taheri Moghaddar</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=alitaheri" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=alitaheri" title="Documentation">📖</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=alitaheri" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://github.com/garrettberg"><img src="https://avatars0.githubusercontent.com/u/844459?v=4?s=100" width="100px;" alt=""/><br /><sub><b>garrettberg</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=garrettberg" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=garrettberg" title="Tests">⚠️</a></td>
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</tr>
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<tr>
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<td align="center"><a href="http://milesj.me"><img src="https://avatars2.githubusercontent.com/u/143744?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Miles Johnson</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=milesj" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=milesj" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://www.kweber.com"><img src="https://avatars1.githubusercontent.com/u/2785791?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Kevin Weber</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=kevinweber" title="Code">💻</a></td>
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<td align="center"><a href="https://stackshare.io/jdorfman/decisions"><img src="https://avatars1.githubusercontent.com/u/398230?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Justin Dorfman</b></sub></a><br /><a href="#fundingFinding-jdorfman" title="Funding Finding">🔍</a></td>
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<td align="center"><a href="https://github.com/RoystonS"><img src="https://avatars0.githubusercontent.com/u/19773?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Royston Shufflebotham</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/issues?q=author%3ARoystonS" title="Bug reports">🐛</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=RoystonS" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=RoystonS" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://twitter.com/layershifter"><img src="https://avatars.githubusercontent.com/u/14183168?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Oleksandr Fediashov</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=layershifter" title="Code">💻</a></td>
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<td align="center"><a href="https://github.com/ling1726"><img src="https://avatars.githubusercontent.com/u/20744592?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Lingfan Gao</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=ling1726" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=ling1726" title="Tests">⚠️</a></td>
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<td align="center"><a href="https://github.com/miroslavstastny"><img src="https://avatars.githubusercontent.com/u/9615899?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Miroslav Stastny</b></sub></a><br /><a href="https://github.com/kentcdodds/rtl-css-js/commits?author=miroslavstastny" title="Code">💻</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=miroslavstastny" title="Documentation">📖</a> <a href="https://github.com/kentcdodds/rtl-css-js/commits?author=miroslavstastny" title="Tests">⚠️</a></td>
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</tr>
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</table>
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<!-- markdownlint-restore -->
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<!-- prettier-ignore-end -->
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<!-- ALL-CONTRIBUTORS-LIST:END -->
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This project follows the [all-contributors][all-contributors] specification.
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Contributions of any kind welcome!
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## LICENSE
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MIT
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<!-- prettier-ignore-start -->
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[npm]: https://www.npmjs.com/
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[node]: https://nodejs.org
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[build-badge]: https://img.shields.io/github/workflow/status/kentcdodds/rtl-css-js/validate?logo=github&style=flat-square
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[build]: https://github.com/kentcdodds/rtl-css-js/actions?query=workflow%3Avalidate
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[coverage-badge]: https://img.shields.io/codecov/c/github/kentcdodds/rtl-css-js.svg?style=flat-square
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[coverage]: https://codecov.io/github/kentcdodds/rtl-css-js
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[version-badge]: https://img.shields.io/npm/v/rtl-css-js.svg?style=flat-square
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[package]: https://www.npmjs.com/package/rtl-css-js
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[downloads-badge]: https://img.shields.io/npm/dm/mdx-bundler.svg?style=flat-square
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[npmtrends]: https://www.npmtrends.com/mdx-bundler
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[license-badge]: https://img.shields.io/npm/l/rtl-css-js.svg?style=flat-square
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[license]: https://github.com/kentcdodds/rtl-css-js/blob/main/other/LICENSE
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[prs-badge]: https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square
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[prs]: http://makeapullrequest.com
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[coc-badge]: https://img.shields.io/badge/code%20of-conduct-ff69b4.svg?style=flat-square
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[coc]: https://github.com/kentcdodds/rtl-css-js/blob/main/other/CODE_OF_CONDUCT.md
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[emojis]: https://github.com/kentcdodds/all-contributors#emoji-key
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[all-contributors]: https://github.com/kentcdodds/all-contributors
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<!-- prettier-ignore-end -->
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