Code-for-JavaScript/demo.html at master · fltenwall/Code-for-JavaScript

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<!DOCTYPE html>
	<title></title>
<script type="text/javascript">
class ProxySandbox{
	constructor(){
		const rawWindow = window;
		const fakeWindow = {};
		const proxy = new Proxy(fakeWindow,{
			set(target,p,value){
				target[p] = value;
				return true
			get(target,p){
				return target[p] || rawWindow[p];
		this.proxy = proxy;
const sandbox1 = new ProxySandbox();
const sandbox2 = new ProxySandbox();
window.a = 1;
((window) => {
	window.a = 'hello';
	console.log(window.a)
 })(sandbox1.proxy);
((window) => {
	window.a = 'world';
	console.log(window.a)
 })(sandbox2.proxy)

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