在 javascript ES6 中向 Object 类添加一个方法

Question

I have an Object which I am getting from API response. Now I want to perform some operation on that object and I want to do it in prototype way.

let's say I am getting following object

const user = {
 name: "Carlos",
 gender: "male"
}

Now I want to create a prototype function which can run directly on object like. user.isMale()

how can I achieve the same in ES6

Answer 1

I would recommend to use es6 classes

class User{
    constructor(user = {}){
        this.name = user.name;
        this.gender = user.gender;
    }

    isMale(){
        return this.gender === 'male';
    }
}

let carlos = new User({'carlos', 'male'})

carlos.isMale() // true

and if you retrieve an array of those users you could then map them in this way.

usersArray = usersArray.map(user => new User(user));

Answer 2

 function User(name, gender) { this.name = name; this.gender = gender; } User.prototype.isMale = function() { return this.gender === 'male'; } const user = new User('john', 'male'); alert(user.isMale());