webpack, ts-loader 之提高 typescript 编译速度

设置 transpileOnly 为 true，就会关闭 typescript 类型检查，只做编译。

module.exports = {
  ...
  module: {
    rules: [
      {
        test: /\.tsx?$/i,
        use: [
          {
            loader: 'ts-loader',
            options: {
              transpileOnly: true
            }
          }
        ],
        exclude: /node_modules/
      }
    ]
  },
  ...
}

构建速度对比

构建速度有明显提升，但是关闭了 typescript 类型检查功能，类型错误不会阻断编译。这个明显是不好的，那如何解决了，即想速度有所提升，同时又保持类型检查。答案是肯定的，因为社区如此的强大。

下面我们来偿试一个 webpack 社区的一个类型检查的插件。

fork-ts-checker-webpack-plugin

安装

npm i -D fork-ts-checker-webpack-plugin

使用

const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin')

module.exports = {
  ...
  module: {
    rules: [
      {
        test: /\.tsx?$/i,
        use: [
          {
            loader: 'ts-loader',
            options: {
              transpileOnly: true
            }
          }
        ],
        exclude: /node_modules/
      }
    ]
  },
  plugins: [
    new ForkTsCheckerWebpackPlugin()
  ]
}

编译一下试试

速度有明显提升，typescript 类型检查功能也没有问题。

注意：使用插件如果报 TypeError: Class extends value undefined is not a constructor or null

TypeError: Class extends value undefined is not a constructor or null
at Object. (D:\tang-last\ts-demo\node_modules\fork-ts-checker-webpack-plugin\lib\iss
at Module._compile (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:192:
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)
at Module.load (internal/modules/cjs/loader.js:1049:32)
at Function.Module._load (internal/modules/cjs/loader.js:937:14)
at Module.require (internal/modules/cjs/loader.js:1089:19)
at require (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:161:20)
at Object. (D:\tang-last\ts-demo\node_modules\fork-ts-checker-webpack-plugin\lib\hoo:14:31)
at Module._compile (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:192:
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)
at Module.load (internal/modules/cjs/loader.js:1049:32)
at Function.Module._load (internal/modules/cjs/loader.js:937:14)
at Module.require (internal/modules/cjs/loader.js:1089:19)
at require (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:161:20)
at Object. (D:\tang-last\ts-demo\node_modules\fork-ts-checker-webpack-plugin\lib\hoo at Module._compile (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:192:
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)
at Module.load (internal/modules/cjs/loader.js:1049:32)
at Function.Module._load (internal/modules/cjs/loader.js:937:14)
at Module.require (internal/modules/cjs/loader.js:1089:19)
at require (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:161:20)
at Object. (D:\tang-last\ts-demo\node_modules\fork-ts-checker-webpack-plugin\lib\plu
at Module._compile (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:192:
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)
at Module.load (internal/modules/cjs/loader.js:1049:32)
at Function.Module._load (internal/modules/cjs/loader.js:937:14)
at Module.require (internal/modules/cjs/loader.js:1089:19)
at require (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:161:20)
at Object. (D:\tang-last\ts-demo\node_modules\fork-ts-checker-webpack-plugin\lib\ind
at Module._compile (D:\tang-last\ts-demo\node_modules\v8-compile-cache\v8-compile-cache.js:192: