... 象一块魔法磁铁, 吸引着剩余所有的元素。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
const input={x:1,y:2,a:3,b:4};
const {x,y,...z}=input;
console.log(x);
console.log(y);
console.log(z);
</script>
</body>
</html>