Javascript deep copy vs. shallow copy

www.w3cschool.cn/article/8b3…

• Shallow copy
• There will still be references to objects

function copy(obj){
    var objCopy = {};
    for(var key in obj){
        objCopy[key] = obj[key];
    }
    return objCopy;
}


var person = {name: "Jason".age: 18.car: {brand: "Ferrari".type: "430"}};
var personCopy = copy(person);
Copy the code

• Deep copy
• There are only Number, String, Boolean, Array types
• If you need other types, you can do the conversion yourself

function jsonClone(obj) {
    return JSON.parse(JSON.stringify(obj));
}
var clone = jsonClone({ a:1 });
Copy the code