1. cdn hijacking occasionally; sometimes request with random params (like "react.js?v=12345) is usefull;
2. the plugin is in case of webpack4 and is work only with chunked script

1. report error
2. use SRI

npm i import-retry-plugin --save

webpack.config.js

const ImportRetryPlugin =require("import-retry-plugin");
module.exports = {
  plugins:[new ImportRetryPlugin()]
}

js runtime

// the script must excute before import the chunk file
// src:the script's src
// time:1 (first error)
// time:2 (request src with random params and error again)
window.onChunkError=function(src,time){

}