我很久以来一直在尝试解决这个烦人但肯定很简单的问题。我正在尝试将我的bundle.js分割成块，以优化网站加载时间。
这是我的webpack.config文件:
module.exports = {
devServer: {
historyApiFallback: true
},
entry: {
index: ["./src/index.js"],
vendor: [
"react",
"react-dom",
"react-redux",
"react-router",
"react-router-dom",
"redux"
]
},
output: {
path: __dirname + '/public/views',
filename: "[name].js",
publicPath: "/views/"
},
module: {
loaders: [
{
test: /\.js$/,
loader: "babel-loader",
exclude: [/node_modules/, /pdfmake.js$/]
},
{
test: /\.json$/,
loader: "json-loader"
}
]
},
plugins: [
new webpack.optimize.CommonsChunkPlugin({
name: "vendor",
filename: "vendor.js",
minChunks: Infinity
}),
new webpack.optimize.CommonsChunkPlugin({
name: "meta",
chunks: ["vendor"],
filename: "meta.js"
}),
new webpack.NamedModulesPlugin(),
new HtmlWebpackPlugin({
title: "Deals",
filename: __dirname + "/views/index.ejs",
template: __dirname + "/views/template.ejs",
inject: false
}),
new PreloadWebpackPlugin({
rel: "preload",
as: "script",
include: "all"
}),
new webpack.optimize.OccurrenceOrderPlugin(),
]
};
这是我的简化版index.ejs文件，通过运行webpack代码生成，在template.ejs中得到的结果：
<!DOCTYPE html>
<html lang="en">
<head>
<link href="/pace.css" rel="stylesheet" />
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=yes">
<meta charset="utf-8">
<link rel="stylesheet" href="/style.css">
<link rel="canonical" href="http://verygoodprof.fr/" />
<link rel="preload" as="script" href="/views/index.js">
<link rel="preload" as="script" href="/views/vendor.js">
<link rel="preload" as="script" href="/views/meta.js">
</head>
<body>
<noscript>
<a href="http://enable-javascript.com/">Javascript must me enabled to use this site.</a>
</noscript>
<div class="text-center root" id="root">
</div>
</body>
</html>
在这里，我看到我已经有了我所需的预加载代码块，并且这些代码块是按照要求动态编写的，并且这些代码块位于正确的文件夹中，这些文件夹是在运行webpack代码后创建的。
这是我的index.js文件（React），在webpack.config文件中被指定为索引入口。
ReactDOM.render(
<Provider store={createStoreWithMiddleware(reducers)}>
<AppInit>
<BrowserRouter>
<div style={{ height: "100%" }}>
<ProfRegisteringModal />
<Switch>
{/* <Route path="/inscription/:user" component={Registering} />
<Route path="/inscription" component={Registering} />
<Route path="/connexion" component={SigningIn} />
<Route path="/equipe" component={TeamPres} />
<Route path="/" component={AppContainer} /> */}
<Route
path="/inscription/:user"
getComponent={(location, callback) => {
require.ensure(
[],
function(require) {
callback(
null,
require("./components/registering/registering_landing_page.js")
);
},
"registerChunk"
);
}}
/>
<Route
path="/inscription"
getComponent={(location, callback) => {
require.ensure(
[],
function(require) {
callback(
null,
require("./components/registering/registering_landing_page.js")
);
},
"registerChunk"
);
}}
/>
<Route
path="/connexion"
getComponent={(location, callback) => {
require.ensure(
[],
function(require) {
callback(
null,
require("./containers/registering/signing_in.js")
);
},
"signinChunk"
);
}}
/>
<Route
path="/equipe"
getComponent={(location, callback) => {
require.ensure(
[],
function(require) {
callback(null, require("./components/team_pres.js"));
},
"teampresChunk"
);
}}
/>
<Route
path="/"
getComponent={(location, callback) => {
require.ensure(
[],
function(require) {
callback(null, require("./containers/app_container.js"));
},
"appContainerChunk"
);
}}
/>
</Switch>
</div>
</BrowserRouter>
</AppInit>
</Provider>,
document.querySelector(".root")
);
我注意到的第一件事是，应该构建的“vendor”和“meta”块已经正确构建，但我的内部React组件没有。但这不是主要问题，实际上，当本地运行服务器时，“我看不到我的React应用程序”。然而在控制台中检查后发现index.ejs文件已正确加载。
“当使用一个包含所有内容的简单bundle.js文件（没有块）时，一切都工作得很好”。它指向了index.ejs。
<script src="/views/bundle.js"></script>
非常感谢您的帮助！
编辑
这个 webpack.config 文件让它工作了（感谢 @margaretkru）：
module.exports = {
devServer: {
historyApiFallback: true
},
entry: {
app:"./src/index.js",
vendor: [
"axios",
"jquery",
"react",
"react-dom",
"react-redux",
"react-router",
"react-router-dom",
"redux"
]
},
output: {
path: __dirname + '/public/views',
filename: "[name].js",
publicPath: "/views/"
},
module: {
loaders: [
{
test: /\.js$/,
loader: "babel-loader",
exclude: [/node_modules/, /pdfmake.js$/]
},
{
test: /\.json$/,
loader: "json-loader"
}
]
},
plugins: [
new webpack.NamedModulesPlugin(),
new HtmlWebpackPlugin({
filename: __dirname + "/views/index.ejs",
template: __dirname + "/views/template.ejs",
inject: 'body',
chunks: ['vendor', 'app'],
chunksSortMode: 'manual'
}),
new PreloadWebpackPlugin({
rel: "preload",
include: ["vendor", "app"]
}),
new webpack.optimize.OccurrenceOrderPlugin(),
]
};new webpack.optimize.CommonsChunkPlugin({
name: "vendor",
minChunks: Infinity
}),
new webpack.NamedModulesPlugin(),
new HtmlWebpackPlugin({
filename: __dirname + "/views/index.ejs",
template: __dirname + "/views/template.ejs",
inject: 'body',
chunks: ['vendor', 'app'],
chunksSortMode: 'manual'
}),
new PreloadWebpackPlugin({
rel: "preload",
include: ["vendor", "app"]
}),
new webpack.optimize.OccurrenceOrderPlugin(),
]
};
实际问题并不是加载脚本的顺序，而是我没有在“预加载”之后实际加载脚本：HTMLWebpackPlugin的“inject”行有所帮助，因为它注入了这两行代码：
<script src="/views/vendor.js"/>
<script src="/views/app.js"/>
在我的index.ejs页面中
index.ejs中加载的脚本顺序不正确，应该先加载vendor.js和meta.js，然后才是index.js。但我不明白为什么顺序是错的。 - margaretkru