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# @ant-design/cssinjs
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[![NPM version][npm-image]][npm-url] [![npm download][download-image]][download-url] [](https://github.com/umijs/dumi) [![build status][github-actions-image]][github-actions-url] [![Codecov][codecov-image]][codecov-url] [![bundle size][bundlephobia-image]][bundlephobia-url]
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[npm-image]: http://img.shields.io/npm/v/@ant-design/cssinjs.svg?style=flat-square
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[npm-url]: http://npmjs.org/package/@ant-design/cssinjs
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[github-actions-image]: https://github.com/ant-design/cssinjs/workflows/CI/badge.svg
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[github-actions-url]: https://github.com/ant-design/cssinjs/actions
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[codecov-image]: https://img.shields.io/codecov/c/github/ant-design/cssinjs/master.svg?style=flat-square
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[codecov-url]: https://codecov.io/gh/ant-design/cssinjs/branch/master
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[download-image]: https://img.shields.io/npm/dm/@ant-design/cssinjs.svg?style=flat-square
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[download-url]: https://npmjs.org/package/@ant-design/cssinjs
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[bundlephobia-url]: https://bundlephobia.com/result?p=@ant-design/cssinjs
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[bundlephobia-image]: https://badgen.net/bundlephobia/minzip/@ant-design/cssinjs
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Component level cssinjs solution used in [ant.design](https://ant.design). It's a subset of [Emotion](https://emotion.sh/) with design token logic wrapper. Please feel free to use emotion directly if you want to find a web cssinjs solution. cssinjs related dep packages:
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- stylis
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- @emotion/hash
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- @emotion/unitless
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## Live Demo
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https://ant-design.github.io/cssinjs/
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## Install
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```bash
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npm install @ant-design/cssinjs
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```
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or
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```bash
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yarn add @ant-design/cssinjs
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```
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```bash
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pnpm add @ant-design/cssinjs
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```
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## Development
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```
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npm install
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npm start
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```
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## License
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@ant-design/cssinjs is released under the MIT license.
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## API
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### StyleProvider
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| Prop | Desc | Type | Default |
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| --- | --- | --- | --- |
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| autoClear | Clear inject style element when component remove. | boolean | false |
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| cache | Config cssinjs cache entity. Only set when you need ssr to extract style on you own. | CacheEntity | - |
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| hashPriority | Use `:where` selector to reduce hashId css selector priority | `'low' \| 'high'` | `'low'` |
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| container | Tell cssinjs where to inject style in. | Element \| ShadowRoot | `document.head` |
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| ssrInline | Component wil render inline `<style />` for fallback in SSR. Not recommend. | boolean | false |
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| transformers | Transform css before inject in document. Please note that `transformers` do not support dynamic update | Transformer[] | - |
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### createCache
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return CacheEntity for StyleProvider.
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### createTheme
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Create theme object. When same algorithm provided, it will return same object.
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### Design Token related API
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Since `@ant-design/cssinjs` use strong constraints for cache hit performance, we recommend to view demo `basic.tsx` for usage and `animation.tsx` for animation usage.
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### extractStyle
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Extracts the styles from the cache and returns them as a string.
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#### Parameters
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- `cache` (Cache): The cache instance containing the styles.
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- `options` (object | boolean, optional): Options for extracting the styles.
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- `plain` (boolean, optional): If true, the styles will be returned in plain format. Default is false.
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- `types` (string | string[], optional): The types of styles to extract. Default is ['style', 'token', 'cssVar'].
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#### Returns
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- (string): The extracted styles as a string.
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#### Example
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```typescript
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import { extractStyle, createCache } from '@ant-design/cssinjs';
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// 创建并填充缓存
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const cache = createCache();
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// 注意：在实际使用中，缓存通常会在渲染组件时自动填充
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// 提取样式
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const styles = extractStyle(cache, { plain: true, types: ['style', 'token'] });
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// 使用提取的样式
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const styleElement = document.createElement('style');
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styleElement.innerHTML = styles;
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document.head.appendChild(styleElement);
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```
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## Transform
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When you need transform CSSObject before inject style. You can use `transformers` to handle this:
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```tsx | pure
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import {
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legacyLogicalPropertiesTransformer,
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StyleProvider,
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} from '@ant-design/cssinjs';
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export default () => (
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<StyleProvider transformers={[legacyLogicalPropertiesTransformer]}>
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<MyApp />
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</StyleProvider>
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);
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```
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Follow are the transform we provide:
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#### legacyLogicalPropertiesTransformer
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Convert logical properties to legacy properties. e.g. `marginBlockStart` to `marginTop`:
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- inset
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- margin
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- padding
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- border
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#### px2remTransformer
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Convert pixel units to rem units. [px2remTransformer.options](./src/transformers/px2rem.ts)
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