npm install htmlinsertcdnplugin
const HtmlWebpackInsertsPlugin = require('htmlinsertcdnplugin')
/*webpack.config*/
//cdn file list
let cdnJs=[
{ inject :'head', type:'js', src: '//static.cdn.com/js/html2canvas.min.js' },
{ inject :'head', type:'js', src: '//static.cdn.com/js/react-router-dom.min.js' },
{ inject :'head', type:'js', src: '//static.cdn.com/js/react-dom.production.min.js' },
{ inject :'head', type:'js', src: '//static.cdn.com/js/react.production.min.js' }
]
externals: isEnvProduction?{
"react": "React",
"react-dom": "ReactDOM",
"react-router-dom": "ReactRouterDOM"
}:{}
plugins: [
// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin(),
new HtmlWebpackInsertsPlugin(cdnJs)
] <!doctype html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>demo</title>
<script src=//static.cdn.com/js/react.production.min.js></script>
<script src=//static.cdn.com/js/react-dom.production.min.js></script>
<script src=//static.cdn.com/js/react-router-dom.min.js></script>
<script src=//static.cdn.com/js/html2canvas.min.js></script>
</head>