create-react-app初始化报错及配置less

官方文档

• 我擦咧，新建的文件夹不见了

//报错
warning There appears to be trouble with your network connection. 
Retrying... error An unexpected error occurred: "http://10.1.10.33:8082/@timer%2fdetect-port: no such package available". 
info If you think this is a bug, please open a bug report with the 
with the information provided in "D:\antm-demo\yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

执行以下代码

1. npm config set registry https://registry.npm.taobao.org
2. npm config set disturl https://npm.taobao.org/dist

===

快速启动项目

1. npm i create-react-app -g

2. create-react-app react-demo

3. cd react-demo/

4. npm start

安装less-loader 和 less

• npm install less-loader less --save-dev

修改 webpack.config.dev.js 和 webpack.config-prod.js 配置文件

exclude: [
  /.html$/,
  /.(js|jsx)$/,
  /.(css|less)$/,   //敲黑板，划重点
  /.json$/,
  /.bmp$/,
  /.gif$/,
  /.jpe?g$/,
  /.png$/,
],
{
  test: /.(css|less)$/,   //敲黑板，划重点
  use: [
    require.resolve('style-loader'),
    {
      loader: require.resolve('css-loader'),
      options: {
        importLoaders: 1,
      },
    },
    {
      loader: require.resolve('postcss-loader'),
      options: {
        // Necessary for external CSS imports to work
        // https://github.com/facebookincubator/create-react-app/issues/2677
        ident: 'postcss',
        plugins: () => [
          require('postcss-flexbugs-fixes'),
          autoprefixer({
            browsers: [
              '>1%',
              'last 4 versions',
              'Firefox ESR',
              'not ie < 9', // React doesn't support IE8 anyway
            ],
            flexbox: 'no-2009',
          }),
        ],
      },
    },
    //敲黑板，划重点
    {
      loader: require.resolve('less-loader') // compiles Less to CSS
    }
  ],
}