使用craco修改create-react-app的默认配置

1.安装craco：

yarn add @craco/craco or npm i @craco/craco

2. 安装好，修改
   "scripts": {

• "start": "react-scripts start",
• "build": "react-scripts build",
• "test": "react-scripts test",

• "start": "craco start",
• "build": "craco build",
• "test": "craco test",
  }

3. 安装 yarn add craco-less，新建craco.config.js 和
   添加
   const CracoLessPlugin = require('craco-less');

module.exports = {
plugins: [
{
plugin: CracoLessPlugin,
options: {
lessLoaderOptions: {
lessOptions: {
modifyVars: { '@primary-color': '#1DA57A' },
javascriptEnabled: true,
},
},
},
},
],
};