repl for JScript (windows10 only)

repl.example.txt

C:\Users\user\Desktop>cscript //E:{1b7cd997-e5ff-4932-a7a6-2a9e636da385} repl.js
Microsoft (R) Windows Script Host Version 5.812
Copyright (C) Microsoft Corporation. All rights reserved.

> if(true){\
> 1\
> }
1
> var a = 10
undefined
> a
10
> exit

repl.js

let acc = ""
while(true){
	WScript.StdOut.Write("> ")
	const input = WScript.StdIn.ReadLine()
	if(input === "exit"){
		break
	}
	if(input.endsWith("\\")){
		acc += input.slice(0, -1) + "\n"
		continue
	}
	const source = acc + input
	acc = ""
	try{
		const [result = "undefined" ] = [eval(source)]
		WScript.Echo(result)
	}catch(err){
		WScript.Echo(err.message)
		WScript.Echo(err.stack)
	}
}