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webpack css-loader背景圖像錯誤加載

[英]webpack css-loader background-image error loading

我正在研究一個Angular2 + ES2015 + Babel + Webpack項目,當我在CSS文件中包含圖像並使用css-loader時,我遇到了這個問題,它已經花了幾個小時來解決問題,但到目前為止沒有運氣:

ERROR in ./src/app/home/home.component.css
Module build failed: SyntaxError: /path/to/project/src/app/home/images/penguin.png: Unexpected character '�' (1:0)
> 1 | �PNG
    | ^
  2 | 
  3 | 
  4 | IHDR��>a�gAMA��7��!�IDATx��]xTEמ�B�"�)"��� ��T?@?�iRiD�tPA��)"���$��K���K���wτ���f��M6a���OHؽ3s�3gΜ93#���>���x��}����>���x�Ƅ&���f&�o>
                                                ��ɉI�O����#S�a-a
                                                                  �9�8!�W1<�)O�G�j��B�
    at Parser.pp.raise (/path/to/project/node_modules/babylon/lib/parser/location.js:22:13)
    at Parser.getTokenFromCode (/path/to/project/node_modules/babylon/lib/tokenizer/index.js:561:12)
    at Parser.readToken (/path/to/project/node_modules/babylon/lib/tokenizer/index.js:180:21)
    at Parser.readToken (/path/to/project/node_modules/babylon/lib/plugins/flow.js:164:22)
    at Parser.nextToken (/path/to/project/node_modules/babylon/lib/tokenizer/index.js:169:21)
    at Parser.parse (/path/to/project/node_modules/babylon/lib/parser/index.js:128:12)
    at parse (/path/to/project/node_modules/babylon/lib/index.js:47:47)
    at File.parse (/path/to/project/node_modules/babel-core/lib/transformation/file/index.js:517:34)
    at File.parseCode (/path/to/project/node_modules/babel-core/lib/transformation/file/index.js:603:20)
    at /path/to/project/node_modules/babel-core/lib/transformation/pipeline.js:49:12
    at File.wrap (/path/to/project/node_modules/babel-core/lib/transformation/file/index.js:563:16)
    at Pipeline.transform (/path/to/project/node_modules/babel-core/lib/transformation/pipeline.js:47:17)
    at Object.transformFileSync (/path/to/project/node_modules/babel-core/lib/api/node.js:144:10)
    at compile (/path/to/project/node_modules/babel-register/lib/node.js:129:20)
    at loader (/path/to/project/node_modules/babel-register/lib/node.js:158:14)
    at Object.require.extensions.(anonymous function) [as .js] (/path/to/project/node_modules/babel-register/lib/node.js:168:7)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/path/to/project/src/app/home/home.component.css:6:2430)
    at Module._compile (module.js:409:26)
    at Object.loaderContext.exec (/path/to/project/node_modules/webpack-core/lib/NormalModuleMixin.js:88:7)
    at Object.module.exports (/path/to/project/node_modules/to-string-loader/src/to-string.js:6:54)

如果你有一個搜索錯誤,你會發現github問題和stackoverflow上的類似情況,但不完全相同。 在所有這些中都指出了缺少圖像加載器(png文件在這里),但在我的情況下,我有一個完美的工作。 如果直接在JS文件上require('../image/penguin.png') ,它就會被加載並導出到輸出路徑!

我的進程和Webpack配置非常復雜,大而且分成不同的文件,但這是有趣的部分

import config from './config';

{
  [...]
  module: {
    preLoaders: [
      {
        test: /\.js$/,
        exclude: [/node_modules/],
        loader: 'eslint'
      },
      {
        test: /\.css$/,
        exclude: [/node_modules/],
        loader: 'postcss?pack=lint'
      }
    ],
    loaders: [
      {
        test: /\.js$/,
        exclude: [/node_modules/, /\.(spec|e2e)\.js$/],
        loaders: [
          'babel',
          'angular2-template'
        ]
      },
      {
        test: /\.css$/,
        exclude: [/node_modules/],
        loaders: [
          'to-string',
          'css?-import',
          'postcss?pack=process'
        ]
      },
      {
        test: /\.(png|jpe?g|gif)$/,
        loaders: [
          'url?limit=10000&name=assets/images/[name].[ext]?[hash:20]',
          'image-webpack?bypassOnDebug&optimizationLevel=6'
        ]
      },
      [...]
    ]
  },
  output: {
    path: resolve(config.paths.dist),
    publicPath: `http://${config.dev.host}:${config.dev.port}/`,
    filename: '[name].js',
    sourceMapFilename: '[name].map',
    chunkFilename: '[id].chunk.js'
  },
  [...]
}

這里是引發錯誤的css

[...]
.post-image {
  height: 150px;
  background-image: url(./images/penguin.png);
  background-position: center center;
  background-repeat: no-repeat;
}

如果對css使用to-string-loader看起來很奇怪,那是因為angular2-template-loader允許將CSS直接內聯到Angular2 Componet的stylesUrl

由於錯誤堆棧,似乎一旦css-loader完成了這項工作,png文件沒有加載定義的加載器(url!image-webpack),但它加載了babel-register? 所以我從css-loader中console.log結果,並且有預期的圖像require

[...]
exports.push([module.id, ".post-image{height:150px;background-image:url(" + require("./images/penguin.png") + ");background-position:50%;background-repeat:no-repeat}", ""]);

所以我讓babel忽略了png文件

{
  "presets": [
    "es2015",
    "angular2",
    "stage-3"
  ],
  "ignore": ["*.png"]
}

這引發了一個略有不同的錯誤,因為babel忽略了圖像,但最終似乎是相同的:

ERROR in ./src/app/home/home.component.css
Module build failed: SyntaxError: Unexpected token ILLEGAL
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:373:25)
    at loader (/path/to/project/node_modules/babel-register/lib/node.js:158:5)
    at Object.require.extensions.(anonymous function) [as .js] (/path/to/project/node_modules/babel-register/lib/node.js:168:7)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/path/to/project/src/app/home/home.component.css:6:2430)
    at Module._compile (module.js:409:26)
    at Object.loaderContext.exec (/path/to/project/node_modules/webpack-core/lib/NormalModuleMixin.js:88:7)
    at Object.module.exports (/path/to/project/node_modules/to-string-loader/src/to-string.js:6:54)

我沒有任何線索,我要去WTF只是在CSS文件上設置圖像背景應該很容易就像餡餅一樣

有什么想法嗎??

終於做到了。

問題的根源在鏈的末尾: to-string-loader

加載器使用Loader.exec來處理來自css-loader的響應,但是這段代碼有一個已知的問題

除了停止使用加載器之外,還可以在該問題中找到一些解決方案。 但到目前為止,最好的是創建一個由Mathias Raacke(@ooc) 在另一個問題上提出的特殊加載器。

我希望這可以幫助別人不浪費這么多時間!

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