Nov 1, 2018
Inheritance is the process of inheriting properties of objects of one constructor by objects of another constructor.When a constructor is derived from a cons...
Multilevel Inheritance in javascript
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Inheritance is the process of inheriting properties of objects of one constructor by objects of another constructor.When a constructor is derived from a cons...
Multilevel Inheritance in javascript
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OOP in JavaScript
Here is the quick example of inheritance in JavaScript. This example was taken from https://developer.mozilla.org/en/Introduction_to_Object-Oriented_JavaScript
// define the Person Class function Person() {} Person.prototype.walk = function(){}; Person.prototype.sayHello = function(){ alert ('hello'); }; // define the Student class function Student() { // Call the parent constructor Person.call(this); } // inherit Person Student.prototype = new Person(); // correct the constructor pointer because it points to Person Student.prototype.constructor = Student; // replace the sayHello method Student.prototype.sayHello = function(){ alert('hi, I am a student'); } // add sayGoodBye method Student.prototype.sayGoodBye = function(){ alert('goodBye'); } var student1 = new Student(); student1.sayHello(); student1.sayGoodBye(); // check inheritance alert(student1 instanceof Person); // true alert(student1 instanceof Student); // true