Spread运算符将允许您将数组拆分为单个参数。这些参数是那些，它们是单独参数的功能。
function myfunction(...iterableObj);
<html>
<body>
<script>
var a, b, c, d, e, f, g;
a = [10,20];
b = "rank";
c = [30, "points"];
d = "run"
//concat方法。
e = a.concat(b, c, d);
//点差运算符
f = [...a, b, ...c, d];
document.write(e);
document.write("<br>"+f);
</script>
</body>
</html>