1、使用解构获取json数据
let jsonData = {
id: 1,
status: "OK",
data: [a, b]
};
let { id, status, data: number } = jsonData;
console.log(id, status, number ); // 1,“OK”,[a, b]
2、使用扩展字符串合并数组
let a1 = [1,2];
let a2 = [3,4];
console.log([...a1,...a2]) // [1,2,3,4]
3、使用Set实现数组去重
let arr = [1,2,2,3];
console.log([... new Set(arr)]) // [1,2,3]
4、使用apply改变this指向
let name = "maomin";
let obj = {
name:'xqm',
say:function(year,place){
console.log(this.name+' is '+year+' born from '+place);
}
};
let say = obj.say;
setTimeout(function(){
say.apply(obj,['1996','China']);
},0)
5、使用解构快速交换变量值
let a = 10;
let b = 20;
[a,b] = [b,a];
6、使用解构实现多变量赋值
let [a,b,c]=[1,2,3];