jpp.js

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What's jpp.js

Jpp.js is a library to extend some useful functions such as create a powerful class (with private & protected & public & static properties and methods) for JavaScript. The meaning of jpp is JavaScript plus plus.

How to use jpp.js

First, you need to get jpp.js.

With Git:

$ git clone git@github.com:yuehaowang/jpp.js.git

Without Git:

The url to download the library is: https://github.com/.../master.zip

Second, copy jpp-a.b.c.js to your project directory and import the js file, then you can use jpp. It's so easy, isn't it?

A live example

The example below is to show how to create a powerful class which is enabled to define private, protected and public properties and methods:

var People = jpp.class({
	extends : null,
	private : {
		id : null,
		hobby : null
	},
	protected : {
		money : null,
		phoneNumber : null
	},
	public : {
		firstName : null,
		lastName : null,
		age : null,
		birthday : null,
		occupation : null,
		
		constructor : function (name, id) {
			if (name) {
				var nameArray = name.split(" ");

				this.firstName = nameArray[0];
				this.lastName = nameArray[1];
			}

			if (id) {
				this.id = id;
			}
		},

		setBirthday : function (date) {
			if (date) {
				this.birthday = date;
			}
		},

		getBirthday : function () {
			return this.birthday;
		},

		askForId : function () {
			return this.id;
		},

		findHobby : function () {
			return this.hobby;
		}
	},
	static : {
		OCCUPATION_PROGRAMMER : "programmer",
		OCCUPATION_ARTIST : "artist",
		OCCUPATION_MUSICIAN : "musician",
		OCCUPATION_STUDENT : "student"
	}
});

var peter = new People("Peter Wong", 543232123565);
peter.occupation = People.OCCUPATION_PROGRAMMER;

peter.setBirthday("19980727");

// result: Peter
alert(peter.firstName);
// result: 19990727
alert(peter.getBirthday());
// result: 51092028
alert(peter.askForId());
// result: null
alert(peter.findHobby());
// result: programmer
alert(peter.occupation);
// error
alert(peter.id);

Browser compatibility

As Object.defineProperty is used in jpp.js, so there are some problems about compatibility. Here is the table to tell you the compatibility situation:

Desktop

Firefox	Google Chrome	Internet Explorer	Opera	Safari
4.0	5	9	11.6	5.1

Mobile

Firefox Mobile	Android	IE Mobile	Opera Mobile	Safari Mobile
4.0	Yes	9	11.5	Yes

From: https://developer.mozilla.org/.../defineProperty#Browser_compatibility

Documentation

The documentation will be released when the formal version is released. Stay tuned!~

Support

If you find the library has some bugs or you have any questions or advice, please let me know:

My email: wangyuehao1999@gmail.com

My twitter: twitter.com/yuehaowang

Changelog

version 0.3.1

1. Bugfix: private & protected properties and methods cannot be used in inner methods of the class.
2. Bugfix: when a overloaded function A is called, if A accepts less arguments than a former overloaded function B whose first few arguments' type are similar to A's , the former function B will be called instead of A.

version 0.3.0

1. Bugfix: private & protected are invalid because of the wrong condition in if () {...}.
2. Added: jpp.overload function to create a function which is enabled to execute different codes in a function because of different arguments.

version 0.2.0

1. Added jpp.Detector function to determine if a object is available or if a object is a instance of the class or a object's type is one of basic type (string, object, function, number, boolean, etc).
2. Added super method for classes which are created by jpp.class. Using this method will call base class' constructor.
3. Improvement: extends property is used to be a Object containing baseClass property and arguments property but now this property is given the base class.

version 0.1.1

1. Added static property for jpp.class to add static properties or methods to classes.
2. Improvement: throw RangeError when you get/set private or protected properties and methods out of the class instead of no-type error.

version 0.1.0

1. Added jpp.class function to create powerful classes with private & protected properties and methods. And you can use extends property for inheritance.