{
test: /.(png|jpg|gif)$/,
loader: 'file-loader?name=img/img-[hash:6].[ext]',
},
我将此配置添加到webpack.config.js
中file-loader
,以便通过将上述规则添加到
module: {
rules: [
部分,但即使我将图像文件放入src/images/
,也没有图像文件移动到dist/
文件夹中。我错过了需要添加到 webpack 配置中的东西吗?
我正在遵循 https://julienrenaux.fr/2015/03/30/introduction-to-webpack-with-practical-examples/的例子
顺便说一下,我正在使用 webpack 2... 现在有没有不同的方法来配置文件加载器?
这是整个 webpack 配置文件
const { resolve } = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const OpenBrowserPlugin = require('open-browser-webpack-plugin');
const config = {
devtool: 'cheap-module-eval-source-map',
entry: [
'react-hot-loader/patch',
'webpack-dev-server/client?http://localhost:8080',
'webpack/hot/only-dev-server',
'./main.js',
'./assets/scss/main.scss',
],
output: {
filename: 'bundle.js',
path: resolve(__dirname, 'dist'),
publicPath: '/',
},
context: resolve(__dirname, 'app'),
devServer: {
hot: true,
contentBase: resolve(__dirname, 'dist'),
publicPath: '/',
},
module: {
rules: [
{
test: /.js$/,
loaders: [
'babel-loader',
],
exclude: /node_modules/,
},
{
test: /.scss$/,
exclude: /node_modules/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: [
'css-loader',
{
loader: 'sass-loader',
query: {
sourceMap: false,
},
},
],
}),
},
{ test: /.(png|jpg)$/, use: 'url-loader?limit=15000' },
{ test: /.eot(?v=d+.d+.d+)?$/, use: 'file-loader' },
{ test: /.woff(2)?(?v=[0-9].[0-9].[0-9])?$/, use: 'url-loader?limit=10000&mimetype=application/font-woff' },
{ test: /.[ot]tf(?v=d+.d+.d+)?$/, use: 'url-loader?limit=10000&mimetype=application/octet-stream' },
{ test: /.svg(?v=d+.d+.d+)?$/, use: 'url-loader?limit=10000&mimetype=image/svg+xml' },
{
test: /.(png|jpg|gif)$/,
loader: 'file-loader?name=img/img-[hash:6].[ext]',
},
],
},
plugins: [
new ExtractTextPlugin({ filename: 'style.css', disable: false, allChunks: true }),
new CopyWebpackPlugin([{ from: 'vendors', to: 'vendors' }]),
new OpenBrowserPlugin({ url: 'http://localhost:8080' }),
new webpack.HotModuleReplacementPlugin(),
],
};
module.exports = config;
使用以下代码片段要求main.js
内的所有文件src/images/
(或图像所在的任何位置):
// load assets
function requireAll(r) { r.keys().forEach(r); }
requireAll(require.context('src/images/', true));
这将使 Webpack 处理位于此文件夹中的所有文件。
它在你遵循的示例中说:
您现在可以使用
require('./src/image_big.jpg')
要求任何图像文件;
如果您不将图像导入到某处,webpack 将不会复制它们,因为它仅将file-loader
应用于它看到的导入并匹配您的规则。您也可以使用url
在 Sass 中导入它们,例如:
background-image: url('./src/image.jpg');
您还有两条.png
和.jpg
规则:
{ test: /.(png|jpg)$/, use: 'url-loader?limit=15000' },
{
test: /.(png|jpg|gif)$/,
loader: 'file-loader?name=img/img-[hash:6].[ext]',
},
选择其中之一。因为现在它将同时应用两者,但实际上只使用了其中一个,因此当图像大于 15kb 时,您最终会得到两个图像,因为当文件大于配置的限制时url-loader
将回退到file-loader
。
参考:https://angular.io/docs/ts/latest/guide/webpack.html
我建议尝试上面引用的指南。 请注意,您需要运行以下命令才能使其全部正常工作:
npm install --save-dev karma-jasmine-html-reporter
关于您的问题,上述示例指南中的图像通过 html 文件的<img>
标签引用。 这个<img>
引用由 webpack 拾取,图像文件被放置在输出 "dist/" 文件夹中创建的 assets 目录中:
"app.component.html":
<main>
<h1>Hello from Angular App with Webpack</h1>
<img src="../assets/images/angular.png">
</main>
这是他们的 webpack 配置文件和他们的加载器:
"webpack.conf.js":
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var helpers = require('./helpers');
module.exports = {
entry: {
'polyfills': './src/polyfills.ts',
'vendor': './src/vendor.ts',
'app': './src/main.ts'
},
resolve: {
extensions: ['.ts', '.js']
},
module: {
rules: [
{
test: /.ts$/,
loaders: [
{
loader: 'awesome-typescript-loader',
options: { configFileName: helpers.root('src', 'tsconfig.json') }
} , 'angular2-template-loader'
]
},
{
test: /.html$/,
loader: 'html-loader'
},
{
test: /.(png|jpe?g|gif|svg|woff|woff2|ttf|eot|ico)$/,
loader: 'file-loader?name=assets/[name].[hash].[ext]'
},
{
test: /.css$/,
exclude: helpers.root('src', 'app'),
loader: ExtractTextPlugin.extract({ fallbackLoader: 'style-loader', loader: 'css-loader?sourceMap' })
},
{
test: /.css$/,
include: helpers.root('src', 'app'),
loader: 'raw-loader'
}
]
},
plugins: [
// Workaround for angular/angular#11580
new webpack.ContextReplacementPlugin(
// The (\|/) piece accounts for path separators in *nix and Windows
/angular(\|/)core(\|/)(esm(\|/)src|src)(\|/)linker/,
helpers.root('./src'), // location of your src
{} // a map of your routes
),
new webpack.optimize.CommonsChunkPlugin({
name: ['app', 'vendor', 'polyfills']
}),
new HtmlWebpackPlugin({
template: 'src/index.html'
})
]
};