使ES6兼容IE

<script type="text/babel">
	const arr1=[1,2,3]
	const arr2=[...arr1]
	console.log(arr2);
	let arr3=arr2.map((x)=>x*2)
	console.log(arr3);
	const [x,y,z]=[[...arr3]]
	console.log(x);

	class Point {
		constructor(x, y) {
			this.x = x;
			this.y = y;
		}

		toString() {
			return '(' + this.x + ', ' + this.y + ')';
		}
	}
	console.log(new Point(1, 2).toString());
</script>
<script src="browser.min.js"></script>

    即在<script>标签后导入browser.min.js(browser.min.js)就行了。结果为： 

index.js:4 [1, 2, 3]
index.js:5 [2, 4, 6]
index.js:7 [2, 4, 6]
index.js:20 (1, 2)