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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                在 CSS Modules 中,一個選擇器可以繼承另一個選擇器的規則,這稱為"組合"(["composition"](https://github.com/css-modules/css-modules#composition))。 在[`App.css`](https://github.com/ruanyf/css-modules-demos/blob/master/demo04/components/App.css)中,讓`.title`繼承`.className`?。 ~~~ .className { background-color: blue; } .title { composes: className; color: red; } ~~~ [`App.js`](https://github.com/ruanyf/css-modules-demos/blob/master/demo04/components/App.js)不用修改。 ~~~ import React from 'react'; import style from './App.css'; export default () => { return ( <h1 className={style.title}> Hello World </h1> ); }; ~~~ 運行這個示例。 ~~~ $ npm run demo04 ~~~ 打開`http://localhost:8080`,會[看到](http://ruanyf.github.io/css-modules-demos/demo04/)紅色的`h1`在藍色的背景上。 `App.css`編譯成下面的代碼。 ~~~ ._2DHwuiHWMnKTOYG45T0x34 { color: red; } ._10B-buq6_BEOTOl9urIjf8 { background-color: blue; } ~~~ 相應地,?`h1`的`class`也會編譯成`<h1 class="_2DHwuiHWMnKTOYG45T0x34 _10B-buq6_BEOTOl9urIjf8">`。
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