CODEWITHSUNDEEP
javascript
ton
ton

Reputation: 4607

js how to print the objectName to console

When using the webdev tools console, if type a browser object, it returns console

> console
Console {  }
> console+""
"[object Console]"
> console.log(console)
undefined
> Console {  }

Works in this way for all browser objects; But if I do it with my own object, the output don't have my objectName(MyObj), only "Object" like this:

> var MyObj=function(){}
undefined
> var instance = new MyObj();
undefined
> instance
Object {  }
> instance+""
"[object Object]"
> console.log(instance);
undefined
Object {  }

Is there a way to make my objects output behavior be the same of browser objects ? And, can anyone anyone explain me why ?

Upvotes: 0

Views: 2784

Answers (1)

Zeta
Zeta

Reputation: 105955

You can override the toString() method in MyObj.prototype: 

MyObj.prototype.toString = function(){ return "[object MyObj]";}

Example

var MyObj = function(){};    
MyObj.prototype.toString = function(){ return "[object MyObj]"; };

var instance = new MyObj();

console.log(instance + "");
// "[object MyObj]"

Upvotes: 4

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