JS deep copy - Notes

Recursive implementation

Applicable to any data type

// Achieve deep cloning 
let ooo={name:'name',age:'age',sex:[['sex']],ok:()=>console.log(1)}

const deepClone=(obj)=>{
     // Judge whether it is Object,Array The type of 
    if(obj&&typeof obj==='object'){
        // Reference type 
        // Judgment is [] still {}
        let temp=Array.isArray(obj)?[]:{}
        // Cyclic operation , recursive 
        for(let i in obj){
            temp[i]=deepClone(obj[i])
        }
        // return temp
        return temp
    }else{
        // except Object,Array Types other than return directly obj
        return obj
    }
}
let obj=deepClone(ooo)
obj.gender='man'
console.log(obj,ooo)

JSON

Data loss （ Such as function ）

let obj={name:' Little bastard ',msg:{age:18,gender:'man'}}
let newObj=JSON.parse(JSON.stringify(obj))
newObj.msg.gender=' male '
console.log(obj)