Create React App 安装less 报错

执行npm run eject 暴露模块

安装 npm i  less less-loader -D

1.打开 react app 的 webpack.config.js

const sassRegex = /\.(scss|sass)$/;

const sassModuleRegex = /\.module\.(scss|sass)$/;

//添加

const lessRegex = /\.less$/;

const lessModuleRegex = /\.module\.less$/;

 

2. 在 大概467 行 添加 

{

test: lessRegex,

exclude: sassModuleRegex,

use: getStyleLoaders(

{

importLoaders: 2,

sourceMap: isEnvProduction && shouldUseSourceMap,

},

'less-loader'

),

// Don't consider CSS imports dead code even if the

// containing package claims to have no side effects.

// Remove this when webpack adds a warning or an error for this.

// See https://github.com/webpack/webpack/issues/6571

sideEffects: true,

},

// Adds support for CSS Modules, but using SASS

// using the extension .module.scss or .module.sass

{

test: lessModuleRegex,

use: getStyleLoaders(

{

importLoaders: 2,

sourceMap: isEnvProduction && shouldUseSourceMap,

modules: true,

getLocalIdent: getCSSModuleLocalIdent,

},

'less-loader'

),

},

# 必须在 file-loader 上面

 

 

这时 会发现 npm start 会报错 

 

删除 node_modules 

重新安装 npm instal

 

再npm tsatrt 

成功 

 

 

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