javascript - 我的所有代码在由 Webpack 编译时都会运行两次

Question

当我使用 webpack-dev-server 构建我的 js 包时，我的代码每次都会运行两次。不知道如何修复它。

Screenshot of Developer Tools console

我的 webpack 配置:

var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
  devtool: 'cheap-eval-sourcemap',
  entry: [
    'webpack-dev-server/client?http://localhost:8080',
    'webpack/hot/dev-server',
    path.join(__dirname, '../src/main')
  ],
  output: {
    path: path.join(__dirname, '../dist'),
    filename: 'bundle.js'
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.optimize.OccurenceOrderPlugin(),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, '../src/index.html')
    }),
    new CopyWebpackPlugin([
      {
        from: path.join(__dirname, '../assets'),
        to: path.join(__dirname, '../dist/assets')
      }
    ])
  ],
  devServer: {
    contentBase: path.join(__dirname, '../dist'),
    outputPath: '/lol',
    hot: true
  },
  module: {
    loaders: [
      {
        test: /\.js$/,
        loaders: ['babel-loader'],
        include: path.join(__dirname, '../src')
      }
    ]
  }
};

Answer 1

在模板文件中，您可能手动添加了加载 bundle 。

如果你没有

inject: false 

选项

new HtmlWebpackPlugin({
    template: path.join(__dirname, '../src/index.html')
}),

bundle 将再次添加。