js 给对象动态添加属性

1. . []

let obj = {}
obj.name = '张三'
let key = 'age'
let value = 28
obj[key] = value 
console.log(obj) // {name: '张三', age: 28}

2. Object.assign()

let obj = {name: "LISI"}
Object.assign(obj, {tol: 181111111})
console.log(obj) // {name: 'LISI', tol: 181111111}

3. eval

let obj = {name: "LISI"}
let key = 'age'
let value = 28
eval('obj.' + key + '=' + "'" + value+  "'")
console.log(obj) // {name: 'LISI', age: 28}