1. Configurez postcss.config.js selon le site officiel

    module.exports = {
      plugins: [
        require('autoprefixer')
      ]
    }

2. Puis dans webpack.config.js

  {
    test:/\.css$/,
    use: [
      { 
        loader: 'style-loader'
      },
      { 
        loader: 'css-loader',
        options: { importLoaders: 1 }
      },
      { 
        loader: 'postcss-loader'
      }
    ]
  }

3. Exécutez ensuite webpack et une erreur apparaîtra

ERROR in ./~/css-loader?{"importLoaders":1}!./~/.2.0.6@postcss-loader/lib!./app/
common.css
Module build failed: Error: Cannot find module 'caniuse-db/data.json'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\Users\jj\Desktop\webpack\node_modules\.1.7.7@brows
erslist\index.js:5:46)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\Users\jj\Desktop\webpack\node_modules\.6.7.7@autop
refixer\lib\autoprefixer.js:5:18)
    at Object.<anonymous> (C:\Users\jj\Desktop\webpack\node_modules\.6.7.7@autop
refixer\lib\autoprefixer.js:92:4)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\Users\jj\Desktop\webpack\postcss.config.js:3:5)
    at Module._compile (module.js:570:32)
    at requireFromString (C:\Users\jj\Desktop\webpack\node_modules\.1.2.1@requir
e-from-string\index.js:27:4)
    at C:\Users\jj\Desktop\webpack\node_modules\.2.1.3@cosmiconfig\lib\loadJs.js
:11:15
 @ ./app/common.css 4:14-136
 @ ./app/index.js

4. Effacez postcss.config.js et modifiez webpack.config.js. Cela échoue à nouveau et l'erreur est la même qu'à l'étape précédente.

  { 
    loader: 'postcss-loader',
    options: {
      plugins: (loader) => [
        require('autoprefixer')()
      ]
    }
  }

5. Suivez les méthodes trouvées en ligne

new webpack.LoaderOptionsPlugin({
    options: {
        postcss: function() {
            return [require('autoprefixer')];
        }
    }
}),

根据网上做法
npm i webpack-loader-options-merge --save-dev
然后在webpack.config.js加入
var loaderOptionsMerge = require('webpack-loader-options-merge');
loaderOptionsMerge(webpackConfigObject);
webpack(webpackConfigObject);
我不明白new webpack.LoaderOptionsPlugin这里为什么这样写
而且也会报错
loaderOptionsMerge(webpackConfigObject);
                   ^
ReferenceError: webpackConfigObject is not defined

6. Si vous supprimez la partie postcss, il n'y aura aucun problème et cela fonctionnera normalement. Tous les problèmes devraient être là

Seven. J'ai vraiment l'impression que je n'arrive pas à comprendre. Le package.json.webpack ci-joint est non seulement installé globalement, mais aussi --save-dev.

{
  "name": "webpack",
  "version": "1.0.0",
  "description": "",
  "main": "webpack.config.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "bulid": "webpack",
    "start": "webpack-dev-server --env development",
    "lint": "eslint app/ webpack.*.js --cache"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "autoprefixer": "^7.1.1",
    "css-loader": "^0.28.4",
    "eslint": "^4.0.0",
    "eslint-loader": "^1.8.0",
    "html-webpack-plugin": "^2.28.0",
    "less": "^2.7.2",
    "less-loader": "^4.0.4",
    "postcss": "^6.0.2",
    "postcss-loader": "^2.0.6",
    "style-loader": "^0.18.2",
    "webpack": "^2.6.1",
    "webpack-dev-server": "^2.4.5",
    "webpack-loader-options-merge": "0.0.3"
  }
}