造成这个错误主要有3个可能的原因：
 
context上下文不一致 library和name 不一致 生成的dll文件没加入到html文件中
dll.config.js
 
module.exports = {  mode:"production",  output: {    path:path.resolve(__dirname, '../dist'),    filename: '[name].dll.js',    library: dllName, //这里需要和DllPlugin option.name 一致  },  entry: {    "lib": vendors,  },  plugins: [    new webpack.DllPlugin({      path:path.resolve(__dirname,'../dist/manifest.json'),      name: dllName,      context: __dirname, //上下文必填    }),    new CleanWebpackPlugin([`./dist/*.dll.js`,`./dist/*.json`], { root: path.resolve(__dirname, "../") }),  ] }
webpack.config.js   
 
 new webpack.DllReferencePlugin({   context: __dirname, //这个上下文对应DllPlugin   manifest: require('../dist/manifest.json')}   ),   new AddAssetHtmlPlugin(     [      {        filepath: "./dist/*.dll.js", //将生成的dll文件加入到index.html中      },    ]  ),