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Prototypal Inheritance in JavaScript
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| <!DOCTYPE HTML> | |
| <html lang="en-US"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title></title> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| if (typeof Object.create === 'undefined') { | |
| Object.create = function (o) { | |
| function F() {}; | |
| F.prototype = o; | |
| return new F(); | |
| }; | |
| } | |
| (function(){ | |
| var NameSpace = {}; | |
| // Person constructor function | |
| function Person(firstName, lastName) { | |
| this.firstName = firstName; | |
| this.lastName = lastName; | |
| } | |
| // Person prototype | |
| Person.prototype = { | |
| getFullName : function() { | |
| return this.firstName + " " + this.lastName; | |
| } | |
| }; | |
| NameSpace.Person = Person; | |
| // Employee inherits from Person | |
| function Employee(firstName, lastName, position) { | |
| // Call parent constructor | |
| Person.call(this, firstName, lastName); | |
| this.position = position; | |
| } | |
| // Employee prototype extend parents prototype | |
| Employee.prototype = Object.create(Person.prototype); | |
| Employee.prototype.getId = function() { | |
| return this.getFullName() + ", " + this.position; | |
| }; | |
| NameSpace.Employee = Employee; | |
| window.NameSpace = NameSpace; | |
| })(); | |
| var john = new NameSpace.Person("John", "Doe"); | |
| console.log(john.getFullName()); | |
| var jack = new NameSpace.Employee("Jack", "Doe", "Manager"); | |
| console.log(jack.getFullName()); | |
| console.log(jack.getId()); | |
| </script> | |
| </body> | |
| </html> |
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