Javascript access public methods from inside other public methods (same Object)

Question

I have the following JS-Object:

var obj = function(){
   this.var1 = "var1";

   this.getvar1 = function(){
       return this.var1;
   }
   this.call1 = function(){
       this.getvar1();
   }
}

all methods have to be public
all properties have to be public as well

Problem:

If i try to call a public method of the obj-Object from inside another public method of the obj-Object, the "this" keyword refers to the public method itself instead of the Object.

Is there a way to get around this?

It's not an object, it's a function. – Michał Perłakowski Aug 20 '16 at 10:37 — Michał Perłakowski, Aug 20 '16 at 10:37
functions are Objects in Javascript... – simplywing Aug 20 '16 at 12:12 — simplywing, Aug 20 '16 at 12:12
Yes, but I meant that it's not a plain object. – Michał Perłakowski Aug 20 '16 at 12:13 — Michał Perłakowski, Aug 20 '16 at 12:13

dfsq · Answer 1 · 2016-08-20T10:39:29.943

0

You just forgot to return from call1. Add return and it will work as expected:

var obj = function() {
   this.var1 = "var1";

   this.getvar1 = function() {
       return this.var1;
   }
   
   this.call1 = function() {
       return this.getvar1();
   }
}

var a = new obj()
console.log( a.call1() )

edited Aug 20 '16 at 10:39

answered Aug 20 '16 at 10:37

dfsq

191,768
25
236
258

and what if i have to call multiple functions? – simplywing Aug 20 '16 at 10:39
Can you give an example of "call multiple functions"? – dfsq Aug 20 '16 at 10:39
this.call1 = function(){this.function1(); this.function2();} – simplywing Aug 20 '16 at 10:46
So what's the problem? You can call this.function1() from inside of call1. `this` will be what you expect. – dfsq Aug 20 '16 at 10:51

score 0 · Accepted Answer · answered Aug 20 '16 at 10:39

0

You can assign this to a variable(self) and use that:

var obj = function(){
   var self = this;
   self.var1 = "var1";

   self.getvar1 = function(){
       return self.var1;
   }
   self.call1 = function(){
       self.getvar1();
   }
}

answered Aug 20 '16 at 10:39

Arun Ghosh

7,634
1
26
38

score 0 · Answer 3 · answered Aug 20 '16 at 10:40

0

Maybe you meant this:

const obj = {
  var1: 'var1'
 ,getvar1() {
    return this.var1
  }
 ,call1() {
    return this.getvar1()
  }
}

console.log(obj.call1())

answered Aug 20 '16 at 10:40

Michał Perłakowski

88,409
26
156
177

Javascript access public methods from inside other public methods (same Object)

3 Answers3