console.log not rendering inside variable

Question

I have created var template but when I console.log in chrome console nothing shows up. I am a little confused because if I remove the console.log('template created'); and move it above the var template = function() it renders in the console

    var Template = function(){
      // -------------------------------------------------------------------------
      this.__construct  = function(){    
          console.log('template created');
      };
      // -------------------------------------------------------------------------
      //works in console


      console.log('template created');

      var Template = function(){

      // -------------------------------------------------------------------------
      this.__construct  = function(){

      };
      //-------------------------------------------------------------------------
   };

Are you using a JavaScript library? __construct has no special meaning in JavaScript. Therefore, you have to execute the function for it work. — chRyNaN
– chRyNaN, Commented May 21, 2015 at 16:17
this is what i have here but its from a 2013 tutorial so i dont know if its changed but i cant see it being changed var Template = function(){ // ------------------------------------------------------------------------- this.__construct = function(){ console.log('template created'); }; // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- }; — chris keenan
– chris keenan, Commented May 21, 2015 at 16:18
If you do Template.__construct() it should log to the console. I think you are expecting it to automatically work when you construct the Template object, which is not the case. JavaScript has no notion of __construct as I've stated that's a PHP thing I believe. Also, the // characters indicate a comment so they are not necessary. Can you place the link to the tutorial? — chRyNaN
– chRyNaN, Commented May 21, 2015 at 16:21
jream.com/dashboard/course/view/2/74 its a payed tutorial so i dont think you will get access but it was on youtube until the guy put copyright claim in youtube ... — chris keenan
– chris keenan, Commented May 21, 2015 at 20:06

devkaoru · Accepted Answer · 2015-05-21 16:29:29Z

4

Are you expecting the console.log in __construct to fire? Cause it won't. What you're doing with

  this.__construct  = function(){    
      console.log('template created');
  };

is creating a function on a new object ( if you're using Template as a function constructor, i.e. new Template() ). What you end up with is a new object with the function __construct. I.e.

var Template = function(){
  console.log('fires when initialized');

  this.__construct = function () {
    console.log('inside construct');
  };
};

var template = new Template(); // 'fires when initialized'
template.__construct(); // 'inside construct'

It's not recommended to create functions on objects in this fashion. You'd typically want to place these functions on the prototype. I recommend reading up on function constructors for a deeper understanding. http://tobyho.com/2010/11/22/javascript-constructors-and/ seems like a good place to start.

answered May 21, 2015 at 16:29

devkaoru

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1 Comment

chris keenan Over a year ago

you see that works fine your code Template = new template() is what i want to achieve the tutorial i am following is videos from 2013 i think there code works in video with var Template = function() { this.__construct = function() { console.log('Template created'); }; }; thanks i will work along with what you provided

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