js 双向绑定数据

let aaa = [];
let bbb = [1,2,3];
let ccc = [0,9,8];

aaa = bbb; //此时aaa与bbb被绑定(aaa指向bbb的指向) ,若使用push则不会绑定

aaa.push(...ccc);

console.log(aaa); //[1, 2, 3, 0, 9, 8]

console.log(bbb); //[1, 2, 3, 0, 9, 8]