Why my person doesn't say "Hello" when calling one self method ? How to fix this?
var Person = (function () {
function Person() {
this.prototype.say();
}
Person.prototype.say = function() {
alert("hello");
}
return Person;
})();
var person = new Person();
To call function on the current object you shouldn't use prototype, just call it(this.say()).
var Person = (function() {
function Person() {
this.say();
}
Person.prototype.say = function() {
alert("hello");
}
return Person;
})();
var person = new Person();
To learn more about OOP in javascript you can read docs on MDN
Nice doc and examples on MDN for inheritance and prototype chain
Good notice from @FelixKling
The object
thisrefers to doesn't have aprototypeproperty. Only functions have a prototype property.
this refers to doesn't have a prototype property. Only functions have a prototype property. The value of that property becomes the prototype of the value of this. If you want to learn how prototypes work, I recommend reading github.com/getify/You-Dont-Know-JS/blob/master/… .isvforall's solution is fine.
The key point is that the 'prototype' defines the functions available on the object you are 'constructing' in the Person() constructor - referred to as 'this.'
The prototype is the shared base definitions for all of the objects constructed with Person(). Inside the Person() constructor and the other prototype methods, the instance itself is referenced with 'this'.
See documents such as https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain for Reference.
Personvariables.Person's prototype you're assigning to. You want to assign to the outerPerson.prototype, but instead you're assigning to the inner one.return Person;They're the same thing. It's assigned to the prototype of the "inner"Personwhich is then returned and assigned to the "outer"Person. They're using an IIFE.