源映射无法与 Webpack 一起使用

Question

我对 webpack 还很陌生，在配置它来生成必要的源映射时遇到了一些麻烦。在开发工具中它说

检测到源地图

但它显示的是捆绑包而不是原始代码：

这是我的 webpack.config.js：

module.exports = {
  entry: [
    'webpack-dev-server/client?http://localhost:8080/',
    'webpack/hot/dev-server',
    "./src/index.js"
  ],
  output: {
    filename: 'bundle.js',
    path: '/',
  },
  debug: true,
  devtool: 'source-map',
  resolve: {
    extensions: ['', '.jsx', '.scss', '.js', '.json']
  },
  module: {
    loaders: [
      {
        test: /(\.js|\.jsx)$/,
        exclude: /node_modules/,
        loaders: ['react-hot','babel']
      },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        loaders: ["style", "css?sourceMap", "sass?sourceMap"]
      }
    ]
  },
  devServer: { hot: true },
  plugins: [ new webpack.HotModuleReplacementPlugin() ],
  inline: true,
  progress: true,
  colors: true
};

这是我的 package.json：

{
  "name": "react-template",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "dev:test": "./node_modules/.bin/webpack --config webpack.test.config.js",
    "test:bundle": "./node_modules/.bin/tape test/bundle.js",
    "dev:serve": "./node_modules/.bin/webpack-dev-server --config webpack.development.config.js"
  },
  "devDependencies": {
    "babel-loader": "^6.2.1",
    "babel-preset-es2015": "^6.3.13",
    "babel-preset-react": "^6.3.13",
    "babel-preset-stage-0": "^6.3.13",
    "css-loader": "^0.23.1",
    "node-sass": "^3.8.0",
    "on-build-webpack": "^0.1.0",
    "react": "^0.14.6",
    "react-dom": "^0.14.6",
    "react-hot-loader": "^1.3.0",
    "sass-loader": "^3.2.1",
    "style-loader": "^0.13.0",
    "tape": "^4.4.0",
    "webpack": "^1.12.12",
    "webpack-dev-server": "^1.14.1"
  }
}

我尝试了

devtool

选项的多种变体，并阅读了 this、this 和 this，但没有运气。

任何帮助都会很棒！

Answer 1

在

bundle.js

中，您将看到原始的转译 webpack 包 - 这是正常行为。

打开

webpack://

，您将看到您的项目文件。

Answer 2

在 webpack.config.js 文件中添加以下内容：

devtool: "inline-source-map",

你可以从webpack网站找到清晰的信息：

SourceMap 作为 DataUrl 添加到捆绑包中。

Answer 3

确保您的

--mode development

构建脚本中有

npm

，

{
 "name": "test",
 "version": "1.0.1",
 "description": "",
 "scripts": {
 "build": "webpack",
  "start": "webpack-dev-server --mode development --open"
   "test": "echo \"Error: no test specified\" && exit 1",
 },
  "author": "",
  "license": "",
  "devDependencies": {
  "babel-core": "^6.26.3",
  "babel-loader": "^7.1.5",
  "babel-preset-env": "^1.7.0",
  "webpack": "^4.19.1",
  "webpack-cli": "^3.1.0",
  "webpack-dev-server": "^3.1.8"
  },
  "dependencies": {}
 }

webpack.config.js

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

module.exports = {
    entry: './src/web.js',
    devtool: 'inline-source-map',
    output: {
        filename: 'main.js',
        path: path.resolve(__dirname, 'dist')
    },
    mode: 'development',
    module: {
        rules: [{
            test: /\.js$/,
            exclude: /(node_modules)/,
            use: {
                loader: "babel-loader",
                options: {
                    presets: ["babel-preset-env"]
                }
            }
        }]
    },
    devServer: {
        inline: true,
        contentBase: path.join(__dirname, 'dist'),
        compress: true,
        port: 9000,
        watchOptions: {
            index: 'index.html',
            open: true,
            poll: true,
            watchContentBase: true
        }
    },
    watch: true,
    watchOptions: {
        aggregateTimeout: 500,
        ignored: /node_modules/,
        poll: 3000
    }
}

Answer 4

我面临的问题是我的

nginx

配置。我的 nginx 配置对源映射文件抛出 404 错误，因为它无法识别要查找的

.map

文件。所以除了

.map

之外还添加了

.js|.css

并且它被修复了。

location ~* \.(?:css|js|map)$ {
  expires 1y;
  access_log off;
  add_header Cache-Control "public";
}

Answer 5

对我来说，问题是我的 html 中有一个特殊字符“ß”：

<textarea
   id="start_location"
   defaultValue="Gerwigstraße 22, 76131 Karlsruhe"
/>

将默认值更改为

"Gerwigstraße 22, 76131 Karlsruhe"

，源地图再次工作。

Answer 6

如果您的“source-map”不起作用，您可以尝试“inline-source-map”：

devtool: 'inline-source-map',

或者如果您仍然想使用“source-map”，您可以尝试在插件中添加这一行：

  plugins: [
...
new webpack.SourceMapDevToolPlugin({
  test: new RegExp('\.[js|css|mjs].*')
})

],