递推深拷贝

1)常用的的递归深拷贝

function deepClone(origin, target) {
    let tar = target || {},
        toStr = Object.prototype.toString,
        arrType = '[object Array]';
    for (let k in origin) {
        if (origin.hasOwnProperty(k)) { //非原型上的属性
            if (typeof origin[k] === 'object' && origin[k] !== null) { //null 也是对象
                tar[k] = toStr.call(origin[k]) === arrType ? [] : {}
                deepClone(origin[k], tar[k]) //递归
            } else {
                tar[k] = origin[k]
            }
        }
    }
    return tar
}

let obj = {
    id: 1,
    name: 'liSi',
    msg: {
        age: 18
    },
    color: ['pick', 'red']
}



const newObj = deepClone(obj, {})

newObj.msg.age = 20
console.log(obj)
console.log(newObj)

image.png