Javascript equivalent to PHP __construct?

Question

I can't find a set of google search terms that answer this question. Is there a javascript equivalent to PHP's __construct function, i.e. a function that runs automatically whenever the object is instantiated?

var pizza = {
    var crust,
    ** instantiate? **: function(){
        this.crust = true;
    },
    topping: function(myTopping){
        this.crust += myTopping;
    },
    bake: function(){
        alert('done!');
    }
}

var mypizza = new pizza(); // << crust is added right away, internally
mypizza.topping('pepperoni');
mypizza.topping('green pepper');
mypizza.topping('onion');
mypizza.bake();

Have you tried to run your code? You can't call an object like that, or declare variables inside an object literal. — Teemu
– Teemu, Commented Apr 14, 2020 at 17:04

Santhosh J · Accepted Answer · 2020-04-14 17:03:10Z

1

You can use constructor() inside javascript classes for the same use.

Sample:

class Car {
  constructor(brand) {  // Constructor
    this.carname = brand;
  }
}
mycar = new Car("Ford");

answered Apr 14, 2020 at 17:03

Santhosh J

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Mukund Goel · Accepted Answer · 2020-04-14 17:08:50Z

1

You can do something like this -

class Pizza {
  constructor() {
    this.crust = true;
  }
}

const pizza = new Pizza();

More information on constructor is available here for your reading

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/constructor

edited Apr 14, 2020 at 17:08

answered Apr 14, 2020 at 17:03

Mukund Goel

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