Webpack 4 + CSS Modules + LESS

webpack.config.example.js

rules: [
      // Whatever other rules you have here...
      {
        test: /\.less$/,
        use: [
          {
            loader: "style-loader"
          },
          {
            loader: "css-loader",
            options: {
              sourceMap: true,
              modules: true,
              localIdentName: "[local]___[hash:base64:5]"
            }
          },
          {
            loader: "less-loader"
          }
        ]
      }
    ]
// Rest of your webpack.config.js