javascript JS中如何实现深复制？

Posted 2021-05-03

function getCopyOfObj(obj){
    let newObj = {}
    for(key in obj){
        if(typeof(obj[key]) != "object"){   //如果是值类型，直接赋值
            newObj[key] = obj[key]
        }else if(obj[key] instanceof Array){  //数组类型
            newObj[key] = []
            obj[key].forEach(ele => {
                newObj[key].push(ele)
            })
        }else {
            newObj[key] = getCopyOfObj(obj[key])  //其他对象类型
        }
    }
    return newObj
}

let obj = {
    tag:"ul",
    attrs:{
        key:"111",
        "class":"ulclass"
    },
    innerText:"innerText",
    children:[
        {
            tag:"li",
            attrs:{
                id:"aaa"
            },
            innerText:"1111"
        },{
            tag:"li",
            attrs:{
                id:"bbb"
            },
            innerText:"222"
        }
    ]
}
let newObj = getCopyOfObj(obj)
console.log(obj,newObj)