Question

i written a simple javascript inheritance prototype, but i am getting issue.. any one guide me the correct declaration?

code:

var Man = function(params){
  this.name = params.name,
  this.age = params.age,
  this.job = params.job;
}

Man.prototype.work = function(){
  return this.name +' is working as a ' + this.job;
}

var Women = function(params){
  this.name = params.name,
  this.age = params.age,
  this.job = params.job;
}

Women.prototype = new Man(); //assigning the prototype

var man1 = new Man({name:'man1',age:'age1',job:'job1'});
console.log(man1.work()); //it works

var woman1 = new Women({name:'woman1',age:'age2',job:'job2'});
console.log(woman1.work()); // it is not.. why?

the error i am getting :

TypeError: params is undefined
[Break On This Error]   

this.name = params.name,

Answer 1

You’re not passing your parameters from the woman to the man, try this:

Women.prototype = new Man({name:this.name,age:this.age,job:this.job});

Actually, this would work also:

Women.prototype = new Man(this);

The advantage is that it’s just 4 letters of extra code, and this should work on all browsers that support JS.