Javascript create object in function style

Question

#1 (object) 
function Person(f){
      this.firstname = f;

      alert(this.firstname);
    }
    var me = new Person('benny');


#2 (function) 
    function Person(f){
       alert(f);
    }
    Person('benny');

Im new in js oop, I have knowledge of oop in PHP

My question is what's different between 1st one and 2nd one?

in php, if I create an obj, i will start with class{}

in JS, it seems like you can also create an obj var obj = {} OR like create it like a function?

can someone enplane how it works?

check out this developer.mozilla.org/de/docs/Web/JavaScript/Reference/… — winner_joiner
– winner_joiner, Commented Sep 9, 2016 at 15:07
First: In js you are always in an object context. Short Answer to: #1 vs #2 you can do alert(me.firstname); that is not possible on the #2. But some should drop you an good link to an page, where this all is explaint in detail, i watched yesterday a vid that was about 2 hours only about that topic OOP in javascript — JustOnUnderMillions
– JustOnUnderMillions, Commented Sep 9, 2016 at 15:09

Stoycho Trenchev · Accepted Answer · 2016-09-09 16:46:53Z

1

The first is a constructor function and the second is just a plain function with a capital letter.

The constructor function is a way of creating data types. JavaScript offers prototypal inheritance.

Person.prototype.newmethod = function(){...};

There is a class keyword in the new JavaScript version. You could use also TypeScript. It may make more sense to you.

answered Sep 9, 2016 at 16:46

Stoycho Trenchev

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