Extend class - Node.js Object

Node.js examples for Object:Inheritance

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Description

Extend class

Demo Code


'use strict';//from  ww  w  . ja v  a  2  s  .  co  m

function extend(Child, Parent) {
    var F = function () {};
    F.prototype = Parent.prototype;
    Child.prototype = new F();
    Child.prototype.constructor = Child;
}

function Student(props) {
    this.name = props.name || 'Unnamed';
}

Student.prototype.hello = function () {
    alert('Hello, ' + this.name + '!');
};

function PrimaryStudent(props) {
    Student.call(this, props);
    this.grade = props.grade || 1;
}


extend(PrimaryStudent, Student);


PrimaryStudent.prototype.getGrade = function () {
    return this.grade;
};
var pop = new PrimaryStudent();
console.log(pop.name());

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