我正在处理一个Angular2+ES2015+Babel+Webpack项目，当在CSS文件中包含图像并使用css-loader时，遇到了问题，已经花费数小时来解决这个问题，但目前还没有成功:
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)
如果您搜索错误，您会在github问题和stackoverflow上找到类似的情况，但并非完全相同。所有这些情况都指出了缺少图像加载器（此处为png文件），但在我的情况下，我有一个完美地工作的加载器。如果在JS文件中直接要求
require('../image/penguin.png')，它将被加载并导出到输出路径！我的流程和Webpack配置非常复杂，大规模且分裂成不同的文件，但这里是有趣的部分。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'
},
[...]
}
以下是触发错误的CSS代码：
[...]
.post-image {
height: 150px;
background-image: url(./images/penguin.png);
background-position: center center;
background-repeat: no-repeat;
}
如果使用
to-string-loader来处理CSS看起来很奇怪，那是因为angular2-template-loader允许直接将CSS内联到Angular2组件的stylesUrl中。由于错误堆栈，似乎在css-loader完成工作后，png文件没有使用定义的loader（url！image-webpack）加载，而是使用babel-register加载？所以我
console.log了css-loader的结果，发现了预期的图片require。[...]
exports.push([module.id, ".post-image{height:150px;background-image:url(" + require("./images/penguin.png") + ");background-position:50%;background-repeat:no-repeat}", ""]);
所以我让Babel忽略PNG文件。
{
"presets": [
"es2015",
"angular2",
"stage-3"
],
"ignore": ["*.png"]
}
由于Babel忽略了图片，因此这会导致稍微不同的错误，但最终结果似乎是相同的：
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)
我卡住了，一点头绪都没有。看起来只是在CSS文件上设置一个图像背景应该非常容易。
有什么想法吗？