How to convert an object to a custom string in javascript?

Question

I want to overload the conversion of an object to a string, so in the following example, the string "TEST" will be displayed instead of "[object Object]". How to do it?

function TestObj() { this.sValue = "TEST"; } function Test() { var x = new TestObj(); document.write(x); } 

Answer 1

You must overload the toString method ...

 TestObj.prototype.toString = function(){return this.sValue;} 

Example http://jsfiddle.net/Ktp9E/

Answer 2

You need to override the toString () function that all objects have. Try

 TestObj.prototype.toString = function() {return this.sValue };