node.js - Why overriden toString() is not called in javascript -

i tried override tostring() found that, overridden function in not getting called @ all.

i have gone through this , this, not able track mistake.

my attempt:

direction = {     none : 0,     diagonal: 1,     up: 2,     left: 3 };  var node  = function () {     this.direction =  direction.none;     this.weight = 0; }; node.prototype.tostring = function nodetosting(){     console.log('is called');     var ret = "this.weight";     return ret; };  (function driver(){     var node1 = new node();     console.log(node1);     //findlcs("abcbdab", "bdcaba"); })(); 

output:

{ direction: 0, weight: 0 } 

console.log outputs literal value console - not coerce object string , therefore won't execute tostring implementation.

you can force output string this:

console.log(""+node1); 

example:

direction = {      none : 0,      diagonal: 1,      up: 2,      left: 3  };    var node  = function () {      this.direction =  direction.none;      this.weight = 0;  };  node.prototype.tostring = function nodetosting(){      console.log('is called');      var ret = "this.weight";      return ret;  };    (function driver(){      var node1 = new node();      alert(""+node1);      //findlcs("abcbdab", "bdcaba");  })();