ExtJS Plugin Development

ExtJS is the latest advancement in our JavaScript framework. Featuring expanded functionality, plugin-free charting, and a new MVC architecture it's the best Ext JS yet. Ext JS has all the rich UI functionality that most applications require coupled with a vibrant community creating impressive extensions. However, sometimes, you will want to add extra capabilities to a component for which an extension is not available. Ext's elegant design allows us to explore our creativity by adding new features to existing widgets.

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An Ext Plugin is a class (It could also be a singleton object) which is configured into a Component in the plugins config option. All plugins must implement a method named init which is called by the Component, passing itself as the sole parameter at initialization time right at the beginning of the Component's lifecycle, before it has been rendered.

Ext JS offers an extraordinary range of user interface widgets - High performance scalable grids, trees, menus, and more. If you need it, we've probably already built it. And even if it's not in the core library, you're almost certain to find it in the thousands of user extensions.

When an application developer needs to enhance, or change the functioning of an existing Ext Component there are several options open each of which has advantages and disadvantages.

At Silicon Info, before we dive into an implementation, let's examine how a plugin can entwine its required functionality around the existing functionality in an Ext Component without using events. We have huge expertise in ExtJS plugin development.

Ext JS supports all major web browsers including:
  • Internet Explorer 6+
  • Firefox 3.6+ (PC, Mac)
  • Safari 4+
  • Chrome 10+
  • Opera 11+ (PC, Mac)

We explored different ways to implement custom functionality and specifically how to create reusable plugins without creating a fragile class hierarchy. Using plugins to augment Ext's baseline functionality is one of the best approaches when you want to be able to mix and match functionality. The most important concept to grasp is that we can provide additional functionality by augmenting existing methods within a component that are guaranteed to be executed during a components lifecycle.

Ext JS 4 lets developers deliver on an incredible variety of browsers and on more operating systems using the same code — over ten years of browsers in one release. On modern browsers, Ext JS 4 utilizes HTML5 features and falls back to alternatives on older browsers. Whether you’re using Ext JS’ built-in UI components, using the new Charting package, or theming your application, Ext JS 4 makes it easy to build an app that gives you the power of the web regardless of what browser your customer uses.

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