js遍历对象的方法

let obj = {

         name: 'lulu',

         id: 1,

         age: 18

}

for (let key in obj) {

    console.log( key + ':' + obj[key] )

}

// 输出结果

//  name:lulu

//  id:1

//  age:18

var obj={todos1:'吃饭',todos2:'睡觉',todos3:'晒太阳'};

console.log(Object.keys(obj));   // ["todos1", "todos2", "todos3"]

console.log(Object.values(obj)); // ["吃饭", "睡觉", "晒太阳"]

console.log(Object.getOwnPropertyNames(obj));

//打印结果

//["name", "age", "say"]