Webpack, html-webpack-plugin, Error: Child compilation failed

Question

我的 webpack 配置有问题。实施 html-webpack-plugin 后我得到一个错误，生成的整个错误堆栈 index.html.

错误堆栈： Html Webpack 插件：

  Error: Child compilation failed:
  Conflict: Multiple assets emit to the same filename index.html:
  Error: Conflict: Multiple assets emit to the same filename index.html


compiler.js:76 
[Pre-build]/[html-webpack-plugin]/lib/compiler.js:76:16
Compiler.js:291 Compiler.
[Pre-build]/[webpack]/lib/Compiler.js:291:10
Compiler.js:494 
[Pre-build]/[webpack]/lib/Compiler.js:494:13
Tapable.js:138 next
[Pre-build]/[tapable]/lib/Tapable.js:138:11
CachePlugin.js:62 Compiler.
[Pre-build]/[webpack]/lib/CachePlugin.js:62:5
Tapable.js:142 Compiler.applyPluginsAsyncSeries
[Pre-build]/[tapable]/lib/Tapable.js:142:13
Compiler.js:491 
[Pre-build]/[webpack]/lib/Compiler.js:491:10
Tapable.js:131 Compilation.applyPluginsAsyncSeries
[Pre-build]/[tapable]/lib/Tapable.js:131:46
Compilation.js:645 self.applyPluginsAsync.err
[Pre-build]/[webpack]/lib/Compilation.js:645:19
Tapable.js:131 Compilation.applyPluginsAsyncSeries
[Pre-build]/[tapable]/lib/Tapable.js:131:46
Compilation.js:636 self.applyPluginsAsync.err
[Pre-build]/[webpack]/lib/Compilation.js:636:11
Tapable.js:131 Compilation.applyPluginsAsyncSeries
[Pre-build]/[tapable]/lib/Tapable.js:131:46
Compilation.js:631 self.applyPluginsAsync.err
[Pre-build]/[webpack]/lib/Compilation.js:631:10
Tapable.js:131 Compilation.applyPluginsAsyncSeries
[Pre-build]/[tapable]/lib/Tapable.js:131:46
Compilation.js:627 sealPart2
[Pre-build]/[webpack]/lib/Compilation.js:627:9
Tapable.js:131 Compilation.applyPluginsAsyncSeries
[Pre-build]/[tapable]/lib/Tapable.js:131:46
Compilation.js:575 Compilation.seal
[Pre-build]/[webpack]/lib/Compilation.js:575:8
Compiler.js:488 
[Pre-build]/[webpack]/lib/Compiler.js:488:16
Tapable.js:225 
[Pre-build]/[tapable]/lib/Tapable.js:225:11
Compilation.js:477 _addModuleChain
[Pre-build]/[webpack]/lib/Compilation.js:477:11
Compilation.js:448 processModuleDependencies.err
[Pre-build]/[webpack]/lib/Compilation.js:448:13
next_tick.js:73 _combinedTickCallback
internal/process/next_tick.js:73:7
next_tick.js:104 process._tickCallback
internal/process/next_tick.js:104:9

我的webpack配置代码：

var webpack = require('webpack'),
    path = require('path');


var CopyWebpackPlugin = require('copy-webpack-plugin'),
    ExtractTextWebpackPlugin = require('extract-text-webpack-plugin'),
    HtmlWebpackPlugin = require('html-webpack-plugin'),

const sourcePath = path.resolve(__dirname, './src');
const staticPath = path.resolve(__dirname, './static');

module.exports = function (env) {

    const nodeEnv = env && env.prod ? 'production' : 'development';
    const isProd = nodeEnv === 'production';

    const postcssLoader = {
        loader: 'postcss-loader',
        options: {
            plugins: function () {
                return [
                    require('autoprefixer')
                ];
            }
        }
    }

    const plugins = [
        new webpack.optimize.CommonsChunkPlugin({
            name: 'vendor',
            minChunks: Infinity,
            filename: 'vendor.bundle.js'
        }),
        new webpack.EnvironmentPlugin({
            NODE_ENV: nodeEnv,
        }),
        new HtmlWebpackPlugin({
            template: 'index.html',
            minify: {
                removeComments: true,
                collapseWhitespace: true,
                removeAttributeQuotes: true
            },
            chunksSortMode: 'dependency'
        })
    ];

    if(isProd) {
        plugins.push(
            new webpack.LoaderOptionsPlugin({
                minimize: true,
                debug: false
            }),
            new webpack.optimize.UglifyJsPlugin({
                compress: {
                    warnings: false,
                    screw_ie8: true,
                    conditionals: true,
                    unused: true,
                    comparisons: true,
                    sequences: true,
                    dead_code: true,
                    evaluate: true,
                    if_return: true,
                    join_vars: true,
                },
                output: {
                    comments: false,
                },
            })
        );
    } else {
        plugins.push(
            new webpack.HotModuleReplacementPlugin()
        );
    }

    return {
        devtool: isProd? 'source-map' : 'eval',
        context: sourcePath,

        entry: {
            app: './app/entry.ts',
            vendor: './app/vendor.ts'
        },

        output: {
            path: staticPath,
            filename: '[name].bundle.js',
        },

        module: {
            rules: [
                {
                    test: /\.html$/,
                    exclude: /node_modules/,
                    use: {
                        loader: 'file-loader',
                        query: {
                            name: '[name].[ext]'
                        },
                    },
                },
                {
                    test: /\.css$/,
                    exclude: /node_modules/,
                    use: [
                        'style-loader',
                        'css-loader',
                        'postcss-loader'
                    ]
                },
                {
                    test: /\.scss$/,
                    exclude: /node_modules/,
                    use: [
                        'style-loader',
                        'css-loader',
                        'postcss-loader',
                        'sass-loader'
                    ]
                },
                {
                    test: /\.ts$/,
                    exclude: /node_modules/,
                    use: [
                        'ts-loader'
                    ],
                },
            ],
        },

        resolve: {
            alias: {
                Public: path.resolve(__dirname,'src/public'),
                Style: path.resolve(__dirname,'src/styles')
            },
            extensions: ['.ts','.js', '.html'],
            modules: [
                path.resolve(__dirname, 'node_modules'),
                sourcePath
            ]
        },

        plugins,

        performance: isProd && {
            maxAssetSize: 100,
            maxEntrypointSize: 300,
            hints: 'warning'
        },

        stats: {
            colors: {
                green: '\u001b[32m'
            }
        },

        devServer: {
            contentBase: './src',
            historyApiFallback: true,
            port: 3000,
            compress: isProd,
            inline: !isProd,
            hot: !isProd,
            stats: {
                assets: true,
                children: false,
                chunks: false,
                hash: false,
                modules: false,
                publicPath: false,
                timings: true,
                version: false,
                warnings: true,
                color: {
                    green: '\u001b[32m'
                }
            },
        }
    };
};

我找不到那个错误的任何来源，也许我有点累了，但我想完成它，所以我希望得到你们的帮助。

也许我应该使用一些 raw-loader 来加载 .html(?)，这让我很不高兴。

Answer 1

问题确实出在file-loader，因为它只是简单地将文件复制过来。当 html-webpack-plugin 尝试写入 index.html 时，它已经被 file-loader 写入，因此导致冲突。

有多种方法可以解决该问题，具体取决于您的需要。

您可以将 html-loader 用于 HTML，但如果您希望简单地复制导入的 HTML，则这不是正确的选择。需要明确的是，导入的 HTML 并不是指 html-webpack-plugin.

使用的模板

如果您想为其他 HTML 文件继续使用 file-loader，您可以排除 index.html，这样 html-webpack-plugin 会回退到其默认加载程序。 require.resolve 的工作方式与 require 类似，但会为您提供模块的完整路径而不是其内容。

{
    test: /\.html$/,
    exclude: [/node_modules/, require.resolve('./index.html')],
    use: {
        loader: 'file-loader',
        query: {
            name: '[name].[ext]'
        },
    },
},

当没有加载程序匹配模板时，html-webpack-plugin 使用 ejs loader as a fallback. If you don't need any loader for .html files, you could remove the rule entirely and it would work just fine. That is rather unlikely, otherwise you wouldn't have a .html rule in the first place, but this also means you can use the .ejs extension to not apply the .html rule, as all HTML is valid EJS。您可以将 index.html 重命名为 index.ejs 并相应地更改您的插件配置：

new HtmlWebpackPlugin({
    template: 'index.ejs',
    minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
    },
    chunksSortMode: 'dependency'
})

Answer 2

这可能不是一般情况，但对我来说，问题是由路径中的符号 "!" 引起的。在我将所有内容移动到没有 "!" 的文件夹后，错误消失了。

Answer 3

就我而言，我的模板文件名拼错了。

Answer 4

我不得不升级我的节点版本。那么问题就解决了。

升级到最新节点版本(ubuntu)

sudo npm cache clean -f
sudo npm install -g n
sudo n stable
sudo n latest

检查版本

node -v

您可能需要重新启动终端才能看到最新版本。

Answer 5

我的问题的解决方案是更新节点版本。

Answer 6

delete node modules package then 运行 npm install all package install 然后 npm start 面临同样的问题但是这个过程运行解决了问题所以这个解决方案很有用

Answer 7

几分钟前我遇到了同样的问题，我切换到稳定版本的节点来解决它。成功了

sudo npm cache clean -f

sudo npm install -g n

sudo n stable

Webpack, html-webpack-plugin, Error: Child compilation failed

Webpack, html-webpack-plugin, Error: Child compilation failed

javascript

webpack

html-webpack-plugin