带有 webpack css-loader 的 Sourcemaps

Question

我正在努力让 sourcemaps 与 css-loader 一起工作。

控制台输出：

css-loader 的文档说了什么：

SourceMaps

To include SourceMaps set the sourceMap query param.

require("css-loader?sourceMap!./file.css")

我的webpack.config

var webpack = require('webpack')

module.exports = {
  entry: './src/client/js/App.js',

  output: {
    path: './public',
    filename: 'bundle.js',
    publicPath: '/'
  },

  plugins: process.env.NODE_ENV === 'production' ? [
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin()
  ] : [],

  module: {
    loaders: [
      { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader?presets[]=es2015&presets[]=react' },
      { test: /\.scss$/, loaders: ['style', 'css', 'sass']},
      { test: /\.css$/, loader: "style-loader!css-loader?sourceMap!./file.css" },
      { test: /\.png$/, loader: "url-loader?limit=100000" },
      { test: /\.jpg$/, loader: "file-loader" }
    ]
  }
}

我如何包含 sass

import React from 'react'
import { render } from 'react-dom'
import { Router, browserHistory } from 'react-router'
import routes from './routes'
import '../scss/main.scss'

render(
  <Router routes={routes} history={browserHistory}/>,
  document.getElementById('app')
)

Answer 1

通过 webpack
启用 source-maps
```
...
devtool: 'source-map'
...
```

您可能还想为 Sass-文件启用源映射

module: {
  loaders: [
    ...
    {
      test: /\.scss$/,
      loaders: [
        'style-loader',
        'css-loader?sourceMap',
        'sass-loader?sourceMap'
      ]
    }, {
      test: /\.css$/,
      loaders: [
        "style-loader",
        "css-loader?sourceMap"
      ]
    },
    ...
  ]
}

使用 extract text plugin 将您的 css 提取到文件中。

...
plugins: [
  ...
  new ExtractTextPlugin('file.css')
]
...

Answer 2

您需要在 webpack 配置中设置一些属性。

{
   output: {
      ...
   },

   debug: true, // switches loaders into debug mode
   devtool: 'eval-cheap-module-source-map', // or one of the other flavors, not entirely sure if this is required for css source maps
   ...
}

webpack 开发服务器默认没有调试。除了在您的配置中设置它，您还可以通过 CLI 将 -d 或 --debug 标志传递给 webpack-dev-server。

带有 webpack css-loader 的 Sourcemaps

Sourcemaps with webpack css-loader

css

sass

node.js

webpack

css-loader