问题描述
- 操作系统:
MacOS Catalina 10.15.6
- 节点版本:
v12.18.3
- NPM版本:
6.14.7
- webpack版本:
4.44.1
- terser-webpack-plugin版本:
3.1.0
预期行为
使用TypeScript(仅在现有的React项目中进行配置),我希望TerserPlugin的子依赖项“ jest-worker@26.3.0”不会破坏按路线进行代码拆分。
实际行为
按路线进行代码拆分(在TypeScript配置之前运行良好,但使用了TerserPlugin),-它不再为路由创建块。它仅在生产中发生。 Bundle.js变得更大,并且没有路由块(0.bundle.js,1.bundle.js等)
代码https://reactjs.org/docs/code-splitting.html#code-splitting中的代码拆分使用Suspense / lazy。
代码
webpack.mode-production.js:
optimization: {
minimize: true,minimizer: [
new TerserPlugin({
parallel: true,// false tried too
extractComments: false,sourceMap: false,terserOptions: {
output: {
comments: false,},compress: {
drop_console: true,}),],
这是iTerm输出“ $ npx webpack --mode = production”
npx webpack
webpack is watching the files…
(node:12883) DeprecationWarning: Tapable.plugin is deprecated. Use new API on `.hooks` instead
Hash: 6933e17ca16f76021b02
Version: webpack 4.44.1
Time: 28424ms
Built at: 2020-08-14 11:37:38
13 assets
Entrypoint main = bundle.js (prefetch: 12.bundle.js 3.bundle.js 0.bundle.js 1.bundle.js 2.bundle.js 4.bundle.js 5.bundle.js 6.bundle.js 7.bundle.js 8.bundle.js 9.bundle.js 10.bundle.js)
[4] (webpack)/buildin/harmony-module.js 573 bytes {11} [built]
[8] ./src/contexts/theme.jsx 3.07 KiB {11} [built]
[9] ./src/helpers/index.js 1.1 KiB {11} [built]
[17] ./node_modules/.pnpm/react-redux@7.2.1_49f644e2f7de4182503f8b93abece808/node_modules/react-redux/es/index.js + 22 modules 49.9 KiB {11} [built]
| 23 modules
[18] ./src/App/images/index.js 1.71 KiB {11} [built]
[55] ./src/constants.js 5.51 KiB {11} [built]
[60] ./src/App/App.scss 833 bytes {11} [built]
[62] ./src/redux/reducers/index.js 1.23 KiB {11} [built]
[187] ./src/redux/store.js 3.47 KiB {11} [built]
[203] ./src/App/index.jsx 13.4 KiB {11} [built]
[207] ./src/redux/reducers/qSelections.js 2.05 KiB {11} [built]
[324] ./src/getAppHelpers.js 12.9 KiB {11} [built]
[487] multi react-hot-loader/patch ./src/index.jsx 40 bytes {11} [built]
[491] ./src/index.jsx 5.22 KiB {11} [built]
[498] ./src/styles/index.scss 748 bytes {11} [built]
+ 1437 hidden modules
ERROR in /Users/a17748207/code/strategy-dashboard/node_modules/.pnpm/jest-worker@26.3.0/node_modules/jest-worker/build/index.js
[tsl] ERROR in /Users/a17748207/code/strategy-dashboard/node_modules/.pnpm/jest-worker@26.3.0/node_modules/jest-worker/build/index.js(55,7)
TS2578: Unused '@ts-expect-error' directive.
ERROR in /Users/a17748207/code/strategy-dashboard/node_modules/.pnpm/jest-worker@26.3.0/node_modules/jest-worker/build/index.js
[tsl] ERROR in /Users/a17748207/code/strategy-dashboard/node_modules/.pnpm/jest-worker@26.3.0/node_modules/jest-worker/build/index.js(145,7)
TS2578: Unused '@ts-expect-error' directive.
ERROR in /Users/a17748207/code/strategy-dashboard/node_modules/.pnpm/jest-worker@26.3.0/node_modules/jest-worker/build/index.js
[tsl] ERROR in /Users/a17748207/code/strategy-dashboard/node_modules/.pnpm/jest-worker@26.3.0/node_modules/jest-worker/build/index.js(171,9)
TS2578: Unused '@ts-expect-error' directive.
在“ webpack --mode = development”中,iTerm中存在相同的错误,但是会创建路由块。仅在生产模式下出现问题。
我们如何繁殖?
// https://reactjs.org/docs/code-splitting.html#route-based-code-splitting
import React,{ Suspense,lazy } from 'react';
import { browserRouter as Router,Route,Switch } from 'react-router-dom';
const Home = lazy(() => import('./routes/Home'));
const About = lazy(() => import('./routes/About'));
const App = () => (
<Router>
<Suspense fallback={<div>Loading...</div>}>
<Switch>
<Route exact path="/" component={Home}/>
<Route path="/about" component={About}/>
</Switch>
</Suspense>
</Router>
);
- 配置TypeScript:
package.json:
"devDependencies": {
...
"@types/classnames": "^2.2.10","@types/lodash": "^4.14.159","@types/react": "^16.9.46","@types/react-dom": "^16.9.8","terser-webpack-plugin": "^3.0.2","ts-loader": "^8.0.2","typescript": "^3.9.7",...
}
tsconfig.json:
{
"compilerOptions": {
"outDir": "build","sourceMap": true,"noImplicitAny": true,"module": "es6","target": "es5","jsx": "react","allowJs": true,"esModuleInterop": true
},"exclude": [
"node_modules","src/**/*.js","src/**/*.jsx" // In project only one component converted to TypeScript for Now,and it has .tsx extension.
]
}
我测试了一个案例,其中删除了TerserPlugin(删除了整个webpack.optimization部分)和TypeScript,然后进行了代码拆分。 我还没有找到任何可以解决问题的TypeScript配置(消除iTerm中的错误并修复代码拆分)。
也许有一些解决方法,或者我错过了一些东西?
谢谢。
解决方法
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