@babel/polyfill が非推奨なので core-js に移行しようとしたが WSH 環境でうまく動かない Windows JavaScript = JScript (Windows Scripting Host = WSH) < WSH Parts.js master ver 4.6.0 @babel/polyfill npm start OK Windows WSH IE11 develop ver 5.0.0 beta @babel/polyfill core-js regenerator-runtime IE11WSH core-js ShiftJIS UTF8 JScript Webpack webpack.config babel.config WSH core-js WSHJScript @babel/polyfill core-js @babel/polyfill babel @babel/polyfill

core-js

* * *

JScriptUTF-16LEUTF-8, UTF-8 BOM(chcp)

WSHcore-js

1. core-js
2. UTF-16LE
3.

var set = new Set(["A", "B", "C", "A", "B"])
set.forEach(function(e) {
WScript.Echo(e)
})


4. cscript.exe Edge
`cscript //E:{1b7cd997-e5ff-4932-a7a6-2a9e636da385} minified.js`