By Shea Frederick
The booklet presents lots of enjoyable instance code and screenshots to steer you thru the production of examples to help with studying. via taking a chapter-by-chapter examine each one significant element of the Ext JS framework, the booklet permits you to digest the to be had good points in small, simply comprehensible, chunks, permitting you to begin utilizing the library in your improvement wishes instantly. This e-book is written for internet software builders who're acquainted with HTML yet can have little to no event with JavaScript program improvement. while you are commencing to construct a brand new internet program, or are re-vamping an latest internet software, then this booklet is for you.
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Typically, we would use Ext in a web site that requires a high level of user interaction—something more complex than your typical web site. A web site that requires processes and a work flow would be a perfect example, or Ext could just be used to make your boss gasp with excitement. Ext makes web application development simple by: • Providing easy-to-use cross-browser compatible widgets such as windows, grids, and forms. The widgets are already fine-tuned to handle the intricacies of each web browser on the market, without us needing to change a thing.
So now we've seen how to get our Ext JS party started and ask the user a question. Now let's see what we can do with their answers. Let's add to our dialog's function so that we can decide what to do in response to each of the button-clicks. ','File Copy'); break; } } Remember those built in dialog types I mentioned earlier? Well we just used some of them. They let us accomplish some common tasks without spending time writing the config needed for each standard scenario. [ 30 ] Chapter 2 Click OK and you get a prompt.
So if our user was to click the Yes button, the btn variable would contain a value of yes. Using the example code, we are taking the name of the button clicked, and passing it to alert, as the message. The built-in functionality takes care of making sure the Cancel button, the close icon in the upper right corner, and the Esc key are all tied together to perform the cancel action. This is one of the many ways in which Ext makes the coding of web applications easier for us. [ 27 ] The Staples of Ext Meet JSON and the config object In our example, we are utilizing what's called a config object, which is the primary way to get Ext to do what you want.