Javascript中的解构赋值

1.变量值进行交换

        let a=10,b=20;
        console.log(a,b);
        [a,b]=[b,a];
        console.log(a,b);

2.数组解构

 // 等号左边是右边的模板,必须一样
        let [a,b,c] =[1,2,3];
        console.log(a,b,c);

可预设默认值

        [a,b,c='JS'] =[1,2];
        console.log(a,b,c);

可使用归并参数

        [a,b,...c] =[1,2,3,5,6,66];
        console.log(a,b,...c);

可省略部分参数

        [,,c] =[1,2,3,5,6,66];
        console.log(c);

3.对象解构

          ({id,name}={id:10,name:"手机"});
           console.log(id,name);