【发布时间】：2019-03-20 18:48:55
【问题描述】：
我正在尝试优化我的项目的构建和捆绑大小。但是，每当我运行npm run build 时，它都不会在我的/dist 文件夹下创建任何捆绑块文件。但是npm run dev 在我的/dist 文件夹下创建一个捆绑块就好了。两个 npm 脚本之间的唯一区别是 build 使用我的 webpack.prod 配置，dev 使用我的 webpack.dev 配置。
npm run build 在我的终端中的输出似乎表明它正在创建我指定的所有块（我为主包创建一个块，为每个节点模块创建一个块，以最小化用户需要下载的包我们更新我们的项目）。
我不确定 Webpack 的生产模式中是否有一些默认行为导致了这种情况。
npm run build 输出：
这是我的两个 Webpack 配置文件：
Webpack.prod：
module.exports = env => {
// Get the root path (assuming your webpack config is in the root of your project!)
const currentPath = path.join(__dirname);
// Create the fallback path (the production .env)
const basePath = currentPath + '/.env';
// We're concatenating the environment name to our filename to specify the correct env file!
const envPath = basePath + '.' + env.ENVIRONMENT;
// Check if the file exists, otherwise fall back to the production .env
const finalPath = fs.existsSync(envPath) ? envPath : basePath;
return {
mode: 'production',
entry: ['babel-polyfill', 'react', 'react-dom', './src/Index.tsx'],
output: {
filename: '[name].bundle.js',
path: path.resolve(__dirname, 'dist/')
},
resolve: {
extensions: [".ts", ".tsx", ".js", ".json"]
},
watch: false,
devServer: {
contentBase: 'dist',
port: 3000,
historyApiFallback: true,
inline: true,
https: true
},
optimization: {
splitChunks: {
chunks: 'all',
maxInitialRequests: Infinity,
minSize: 0,
cacheGroups: {
vendor: {
test: /[\\/]node_modules[\\/]/,
name(module) {
// get the name. E.g. node_modules/packageName/not/this/part.js
// or node_modules/packageName
const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1];
// npm package names are URL-safe, but some servers don't like @ symbols
return `npm.${packageName.replace('@', '')}`;
},
},
},
}
},
module: {
rules: [
{
test: /\.tsx?$/,
loader: "ts-loader",
exclude: [
/node_modules/,
],
},
{
test: /\.js$/,
loader: 'babel-loader',
exclude: [
/node_modules/,
],
},
{
test: /\.(png|gif|jpg|woff|eot|ttf|svg|woff2|ico)$/i,
use: "file-loader?name=images/[name].[ext]",
},
{
test: /\.scss$/,
use: ['style-loader', 'css-loader', 'sass-loader']
},
{
test: /\.css$/,
use: ['style-loader', 'css-loader']
},
{
test: /\.(config)$/,
use: "file-loader?name=[name].[ext]"
},
]
},
plugins: [
new HtmlWebpackPlugin({
template: "index.html",
filename: "index.html",
}),
new TSLintPlugin({
files: ['./src/**/*.ts']
}),
new CopyWebpackPlugin([
{ from: './src/favicon.ico' },
{ from: './data/*.json', to: path.resolve(__dirname, 'dist/'), force: true },
], {}),
new Dotenv({
path: finalPath
})
]
}
};
Webpack.dev：
module.exports = env => {
// Get the root path (assuming your webpack config is in the root of your project!)
const currentPath = path.join(__dirname);
// Create the fallback path (the production .env)
const basePath = currentPath + '/.env';
// We're concatenating the environment name to our filename to specify the correct env file!
const envPath = basePath + '.' + env.ENVIRONMENT;
// Check if the file exists, otherwise fall back to the production .env
const finalPath = fs.existsSync(envPath) ? envPath : basePath;
return {
mode: 'development',
devtool: "inline-source-map",
entry: ['babel-polyfill', 'react', 'react-dom', './src/Index.tsx'],
output: {
filename: 'bundle.js',
path: path.resolve(__dirname, 'dist/')
},
resolve: {
// Add '.ts' and '.tsx' as resolvable extensions.
extensions: [".ts", ".tsx", ".js", ".json"]
},
watch: false,
// Enable sourcemaps for debugging webpack's output.
devServer: {
contentBase: 'dist',
historyApiFallback: true,
inline: true,
port: 3000,
https: true
},
optimization: {
splitChunks: {
chunks: 'all',
maxInitialRequests: Infinity,
minSize: 0,
cacheGroups: {
vendor: {
test: /[\\/]node_modules[\\/]/,
name(module) {
// get the name. E.g. node_modules/packageName/not/this/part.js
// or node_modules/packageName
const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1];
// npm package names are URL-safe, but some servers don't like @ symbols
return `npm.${packageName.replace('@', '')}`;
},
},
},
}
},
module: {
rules: [
// All files with a '.ts' or '.tsx' extension will be handled by 'awesome-typescript-loader'.
{
test: /\.tsx?$/,
loader: "ts-loader"
},
{
test: /\.(png|gif|jpg|woff|eot|ttf|svg|woff2|ico)$/i,
use: "file-loader?name=images/[name].[ext]",
},
{
test: /\.scss$/,
use: ['style-loader', 'css-loader', 'sass-loader']
},
{
test: /\.css$/,
use: ['style-loader', 'css-loader']
},
// All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
{
enforce: "pre",
test: /\.js$/,
loader: "source-map-loader",
exclude: [/node_modules/, /build/, /__test__/],
},
{
test: /\.(config)$/,
use: "file-loader?name=[name].[ext]"
},
{
test: /\.js$/,
loader: 'babel-loader'
}
]
},
// When importing a module whose path matches one of the following, just
// assume a corresponding global variable exists and use that instead.
// This is important because it allows us to avoid bundling all of our
// dependencies, which allows browsers to cache those libraries between builds.
externals: {
// "react": "React",
// "react-dom": "ReactDOM"
},
performance: { hints: false },
plugins: [
new HtmlWebpackPlugin({
template: "index.html",
filename: "index.html",
}),
new TSLintPlugin({
files: ['./src/**/*.ts']
}),
new CopyWebpackPlugin([
{ from: './src/favicon.ico' },
{ from: './data/*.json', to: path.resolve(__dirname, 'dist/'), force: true } ,
], {}),
new Dotenv({
path: finalPath
})
]
}
};
【问题讨论】：
标签： webpack build bundle webpack-4