使用webpack-dev-server时,html-webpack-plugin不会将js文件注入index.html

Question

这是我的webpack配置:

var path = require('path');
var webpack = require('webpack')
var HtmlWebpackPlugin = require('html-webpack-plugin')
var fs = require('fs'),buildPath='./dist/';
var folder_exists = fs.existsSync(buildPath);

if(folder_exists == true)
{
    require('shelljs/global')
    rm('-rf', 'dist')

};

module.exports = {

    entry: './src/main',

    output: {
        path: path.join(__dirname, './dist'),

        filename: '[name].js',

        publicPath: '/dist/'

    },


    devServer: {
        historyApiFallback: true,
        hot: false,
        inline: true,
        grogress: true,
    },
    // "vue-hot-reload-api": "^1.2.2",

    module: {

        loaders: [

            { test: /\.vue$/, loader: 'vue' },

            { test: /\.js$/, loader: 'babel', exclude: /node_modules/ },

            { test: /\.css$/, loader: 'style-loader!css-loader'},

        //install css-loader style-loader sass-loader node-sass --save-dev
            { test: /\.scss$/, loader: 'style!css!sass?sourceMap'},

            { test: /\.(png|jpg|gif)$/, loader: 'url-loader?limit=8192&name=images/[name].[ext]'},

            { test: /\.(html|tpl)$/, loader: 'html-loader' },
        ]
    },

    vue: {
        loaders: {
            js:'babel',
            css: 'style-loader!css-loader',
            sass:'style!css!sass?sourceMap'
        }
    },

    babel: {
        presets: ['es2015'],
        plugins: ['transform-runtime']
    },
    plugins:[
       new HtmlWebpackPlugin({
        template: 'index.html',
        filename: './index.html',
        inject:true
       }),
    ],
    resolve: {

        extensions: ['', '.js', '.vue'],

        alias: {
            filter: path.join(__dirname, './src/filters'),
            components: path.join(__dirname, './src/components')
        }
    },

    devtool: 'eval-source-map'
};

在package.json中:

   "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "webpack-dev-server --inline",
    "build": "webpack --config webpack.config.prod.js"
  },

当我运行npm start时,在localhost中没有注入js文件index.html.如果我运行webpack或npm run build,则会成功注入js文件.可html-webpack-plugin也注入js文件到index.html,当我在本地主机是？

Answer 1

此问题特别与webpack-development-server无法将文件写入本地文件系统并将其文件写入MEMORY的事实有关.

这就是为什么当您运行默认的webpack构建命令(不是 WDS/Webpack-Development-Server)时,您能够使用Html-Webpack-Plugin正确生成文件的原因:

webpack 

或者,因为您使用的是vue.js Webpack-simple项目(https://github.com/vuejs-templates/webpack-simple/tree/master/template),您还可以使用Vue附带的npm脚本. js sample(位于package.json内)通过:

npm run build

在任何一种情况下,文件都会像你认为的那样被写入目录,因为使用webpack构建CAN可以编写文件系统,而在使用Webpack-Development-Server时没有写入任何文件(同样这也不起作用,因为WDS写道到内存而不是本地文件系统).

由于你的评论,我在处理同样的问题时偶然发现了这个答案:

"如果我运行webpack或npm运行构建,则会成功注入js文件.当我在localhost时,html-webpack-plugin是否也会将js文件注入index.html？"

综上所述:HTML-的WebPack,插件将不会当它被用来作为的WebPack -发展-服务器(WDS)的一部分写入文件到本地文件系统,即使HTML的的WebPack-插件WILL写文件(具有相同的WebPack配置)使用正常的webpack构建过程(没有WDS).

Answer 2

你可以尝试这样的配置..

new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
      inject: true
    })

和 Index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="x-ua-compatible" content="ie=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <title>My App</title>
</head>
<body>
<div id="app"></div>
<!-- built files will be auto injected -->
</body>
</html>

您将需要安装npm i -D html-webpack-plugin vue-loader vue-html-loader

但我建议您从模板创建一个项目，vue init webpack

该模板使用 html-webpack-plugin