JS如何添加自定义对象的key

let obj = {} //定义一个空对象

let key= "title" //key的名称

obj[key] = "0"

console.log(obj)

===> ↓↓↓↓↓↓↓↓

obj = {

title : "0"

}

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js为一个对象Object添加一个新的属性和值

1,

var obj = {}; //或者 var obj=new Object();
var key = "name";
var value = "张san"
obj[key] = value;

2,

var obj = {};
var key = "name";
var value = "张三"
eval("obj.p" + key + "='" + value + "'");

var obj = {}; //或者 var obj=new Object();
var key = "name";
var value = "child"
obj[key] = '效力';
obj[value] = '哈哈'
console.log(obj)
VM486:6 {name: "效力", child: "哈哈"}