In Object-Oriented programming languages, an interface defines a set of methods which a Class must include in order to implement the interface (otherwise, if the Class is missing the required methods, the code will fail and the interface will throw an error).

Interfaces are useful for making sure developers use the correct implementation of an API.

In JavaScript there are no true "classic" Object-Oriented features, but through clever usage of the language you can emulate an Interface for use with a JavaScript API. In this free HTML JavaScript tutorial, Mark McDonnell guides you how to implement Interfaces in the JavaScript programming language.

Yes, this free HTML JavaScript tutorial is another round-up of very great and helpful JavaScript/jQuery techniques, tools and resources. In this selection we present JavaScript/jQuery date calendars, jQuery calendar datepickers, forms, buttons, JavaScript navigation, navigation menu jQuery, debugging, optimization and compatibility tables as well as handy JavaScript/jQuery resources and tools. We also cover various jQuery add-ons and plug-ins that will help you extend the functionality of your website and improve user experience with ready components or coding solutions.

For improving more your skills and user experience, check out more JavaScript/jQuery, web development, web programming/coding resources below:

- More 100 Super Helpful Cheatsheets for Web Designers Web Developers
- Great Powered Resources for 7 Helpful jQuery Plug-ins
- 35 Cool, Awesome Tools and Resources for Faster JavaScript Application Development
- Super Cool and Great Button Resources and Tutorials with CSS3
- 45 Great CSS and JavaScript solutions

This JavaScript article tutorial is going to show you a list of many useful JavaScript tools, web tools, blogging tools and JavaScript libraries to help us in developing web-based JavaScript applications. These web tools in this JavaScript article tutorial include sour code compression tools, JavaScript editors and IDEs, source code debugging tools and other useful tools, helpful JavaScript libraries, utilities and applications.

You can view full detailed list of these tools at main section, or you can try other helpful web tools in the below list:
- Ultimate List of Web Development Resources with JavaScript, HTML, CSS and Books
- 20+ Helpful Web Tools for Better Code Development
- Ultimate of Awesome JavaScript Libraries for Web-based Applications

The Internet is getting more and more important, we can use it for working, learning, for entertaining ... Only in the aspect of entertainment, we use the Internet to play the online games, to search, listen & download the favorite songs, videos, movies, ...

The Internet also is the very good environment for studying, it helps us in looking for the materials, solving our problems, getting the supports from the other persons, ... Especially in the field of computers in general, the web programming in particular; many people think the programming languages are only for working, there's no joy in it.

In this JavaScript article, Alex Sexton show to you more about JavaScript inheritance with some tiny JavaScript example codes, easy to understand and master your JavaScript inheritance skills.

More JavaScript inheritance tutorials to master:
- JavaScript Classical Inheritance
- Simple Concepts of JavaScript Prototypal Inheritance
- 5 Chief JavaScript Inheritance Concepts

You are being fed up with the JavaScript games and trying to find out how to build Web-based JavaScript games? This JavaScript article tutorial may be a valuable reference source for you in this case.

This JavaScript game making tutorial guides us use a JavaScript game framework - Crafty - to create a simple JavaScript RPG game. This JavaScript RPG game is quite simple but it's so awesome with beautiful graphics, and its gameplay is not too easy to make us feel boredom. Basically, we need to do some necessary tasks such as define the characters, build JavaScript game scenes, create gameplay, making game's animations and combine them into a unified result.

The inner post page will show you all detailed instructions and comments, as well as demo to play with full JavaScript source code for downloading.

This JavaScript article gives you a list of 16 picture slideshow gallery scripts. All these gallery JavaScript codes are free to use, and very easy to setup, edit. From these awesome picture slideshow gallery JavaScript codes, I hope you'll create more beautiful, interactive galleries to your great visitors.

Today in this post, jsB@nk would like to provide you a list of 70+ AJAX utilities, AJAX tools and AJAX applications to enhance your JavaScript applications, based-JavaScript web applications.

In this list, there were many AJAX utilities already presented on jsB@nk:
- AJAX Page Content Loader
- GreyBox: Cool HTML/JavaScript/AJAX/Flash Window Popup
- Interstitial Content Box

But there are still many JavaScript tools need you to reveal. Let's go to the inner page for detailed list.

In the previous HTML JavaScript tutorial, you recently read Mega Collection of Cheat Sheets with HTML, CSS, PHP, Javascript; now in this free HTML JavaScript tutorial, Hilde Torbjornsen shows you another mega collection of 100+ super helpful cheatsheets for web designers, web programmers/coders, web developers, application developers. This list contains more than cheat sheets and reference cards for the following topics: CSS3/2/1 Cheat Sheet, CSS Property Index, BluePrint CSS, HTML 5 Cheat Sheet, HTML5 Canvas Cheat Sheet, HTML5 Glossary, JavaScript Cheat Sheet, jQuery Cheat Sheet, ...

If two these mega collection do not still satisfy your longingness, then check more cheatsheets below:

- The Ultimate JavaScript Tutorial in Web Design
- 10 JavaScript Resources for your Beautiful Web HTML Form Skins
- 10 huge lists of resources for web development

With the stronger support of the JavaScript frameworks such as jQuery, Scriptallicious ... nowadays, web designers and developers can easily create eye-catching effects like Flash. This article introduces you to 30 websites using these JavaScript framework libraries to create scrolling and sliding effects that they are very unique and creative.