Hem*_*ari 7 reactjs babeljs webpack-dev-server babel-loader webpack-4
我最近升级到 webpack 4。页面已成功加载，每当发生更改时，它都会使用 webpack-dev-server 自动刷新页面。它做得很好，但在控制台中显示以下错误
获取http://localhost:8090/build/bundle.js 404（未找到）
有时，当 URL 中有 id 时，它会将 id 附加到捆绑 js url，如下所示
我使用 Stack Overflow 答案和 GitHub 解决方案尝试了很多方法，但没有一个对我有用。以下是模块详细信息
“webpack”：“^4.15.0”，“webpack-cli”：“^3.0.8”，“webpack-dev-server”：“^3.1.4”，“babel-core”：“^6.26.3 ”、“babel-loader”：“^7.1.5”、“babel-plugin-transform-class-properties”：“^6.24.1”、“babel-plugin-transform-object-rest-spread”：“^ 6.26.0", "babel-polyfill": "^6.26.0", "babel-preset-env": "^1.7.0", "babel-preset-react": "^6.24.1"
webpack.config.js：
const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const CompressionPlugin = require("compression-webpack-plugin");
const webpack = require('webpack');
module.exports = {
target: "web",
entry: [
"whatwg-fetch",
'webpack-dev-server/client?http://localhost:8090',
'webpack/hot/only-dev-server',
'babel-polyfill',
"./src/index.js"
],
output: {
path: path.resolve(__dirname, "build"),
filename: "bundle.js",
publicPath: "/"
//make sure port 8090 is used when launching webpack-dev-server
},
plugins: [new HtmlWebpackPlugin({
template: "index.html"
}),
new CompressionPlugin({
asset: "[path].gz[query]",
algorithm: "gzip",
test: /\.js$|\.jsx$|\.css$|\.html$/,
threshold: 10240,
minRatio: 0.8
}),
new webpack.HotModuleReplacementPlugin(),
// enable HMR globally
new webpack.NoEmitOnErrorsPlugin(),
new webpack.ProvidePlugin({
jQuery: 'jquery',
$: 'jquery',
jquery: 'jquery'
})
],
module: {
rules: [
{
//tell webpack to use jsx-loader for all *.jsx files
test: /\.(js|jsx)$/,
exclude: /node_modules/,
loader: "babel-loader"
},
{
test: /\.css$/,
loader: "style-loader!css-loader"
},
{
test: /\.(png|jpg|jpeg|gif|woff|woff2|svg)$/,
loader: 'url-loader?limit=100000'
},
{
test: /\.(eot|ttf)$/,
loader: "file-loader"
},
{
test: /\.html$/,
exclude: /node_modules/,
loader: 'html-loader'
},
{
test: /\.scss$/,
loaders: ["style-loader", "css-loader", "sass-loader"]
}
]
},
resolve: {
modules: [
path.resolve("./src"),
path.resolve("./node_modules")
],
extensions: [".js", ".jsx"]
},
devServer: {
watchOptions: {
// Needed for Windows Subsystem for Linux dev environment:
poll: true
},
contentBase: "/build"
},
devtool: "cheap-module-eval-source-map",
node: {
child_process : "empty",
fs: "empty"
}
};
我的index.html放在根目录下
索引.html
<html>
<head>
<link href="https://fonts.googleapis.com/css?family=Cabin+Sketch" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<div id="App">
<!-- this is where the root react component will get rendered -->
</div>
<script type="text/javascript" src="./build/bundle.js"></script></body>
</html>
在浏览了与此问题相关的所有 github 答案后，我找到了答案。我最终在我的 index.html 中解决了这个问题
问题主要在于在index.html 中指向bundle js。找不到 webpack bundle.js 的原因是我在 index.html 中指定了错误的路径。
下面的解决了我的问题。
<script src="/bundle.js"></script>
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