...扩展运算符

<script>
    var geyao = {
      name: "geyao",
      age: "18"
    }
    var geyaoTest = {
      ...geyao,
      sex: "男"
    }
    console.log(geyaoTest, "geyaoTest")
    var fangfang = ["fangfang", "花花"]
    var fangfangTest = [...fangfang, "康康"]
    console.log(fangfangTest, "fangfangTest")
    //Object { name: "geyao", age: "18", sex: "男" }
    //Array(3) [ "fangfang", "花花", "康康" ]
    fangfangTest

//Object { name: "geyao", age: "18", sex: "男" }
   //Array(3) [ "fangfang", "花花", "康康" ]