1. 安装

npm i less less-loader -D
npm i customize-cra-less-loader -D

2.添加配置项

//config-overrides.js
const { override } = require('customize-cra');
const addLessLoader = require("customize-cra-less-loader");module.exports = {webpack: override(addLessLoader({// strictMath: true,// noIeCompat: true,// loader: "css-loader",// options: {//   modules: {//     localIdentName: "[name]__[local]___[hash:base64:5]",//   },//   sourceMap: true// },// css loader options cssLoaderOptions: {modules: {localIdentName: '[file]',}, },// less loader optionslessLoaderOptions: {lessOptions: {strictMath: true,}}}),)
}

// 需要下载customize-cra-less-loader，别从customize-cra直接导出，会报以下错误
ValidationError: Invalid options object. Less Loader has been initialized using an options object that does not match the API schema.

3.启动

npm start