經常用的ES6語法

// 經常用的ES6語法
	function sum(...m){
		let to = 0;
		for(var i of m){
			to+=i;
		}
		console.log(`to:${to}`)//to:21
	}

	sum(1,2,3,4,5,6);
	//箭頭函數
	let sum1=(...m)=>{
		let to = 0;
		for(var i of m){
			to+=i;
		}
		console.log(`to:${to}`)//to:24
	
	}
	sum1(7,8,9);
	//數組、函數擴展、解構
	var [a,b] = [4,7];
	let arr1 = [1,2],arr2 = [5,6];
	console.log(...[4,7]);//4 7
	console.log(...arr1,...arr2);//1 2 5 6
	let [c,d,e]= "es6"
	console.log(c,d,e);//e s 6
	let xy= [..."ES6"]
	console.log(xy);//["E", "S", "6"]