Ajax For Dummies® by Steve Holzner

By Steve Holzner

Ajax is brief for “Asynchronous JavaScript+CSS+DOM+XMLHttpRequest.”

Even if you happen to weren’t intimidated sooner than, that tidbit is maybe sufficient to make you achieve for the Excedrin. simply succeed in for Ajax For Dummies as a substitute. With reveal photographs, real code and motives, and reside sites the place you will see Ajax purposes doing their factor, it is going to have you ever utilizing Ajax to create internet functions that glance an act like machine functions very quickly. With Ajax, you could accelerate and freshen up your internet functions. consumers at your on-line shop can fill their carts with no looking ahead to a number of web page refreshes. Searchers in your websites can get rapid effects at the comparable page.

This consultant takes you on a travel of the way Ajax is used at the present time, entire with examples of Ajax functions in motion, equivalent to an Ajax-enabled Yahoo! seek or an Ajax-based chat software. Then it delivers fundamentals on utilizing JavaScript. After that you just dive in and get information on:

  • Writing a few Ajax, interactive mouseovers utilizing Ajax, passing info to the server with GET or publish, and more
  • Connecting to Google for a dwell search
  • Using loose Ajax frameworks so that you don’t need to commence from scratch, together with Ajax Gold (written particularly for this book), AJAXLib, and grabbing XML with libXmlRequest
  • All sorts of Ajax innovations, akin to utilizing Ajax for drag-and-drop operations, pop-up menus, downloading photographs backstage, and more
  • Using SACK (simple AJAX code kit), interpreting XML with Sarissa, and developing visible results with Rico
  • Handling XML int Ajax Applications
  • Working with cascading type sheets (CCS) in Ajax, together with establishing the types, exhibiting a menu, styling textual content, dealing with shades and backgrounds, and more
  • Working with Ajax and PHP

Complete with a better half website, unfastened Ajax frameworks, and pattern code you should use, Ajax for Dummies is your pleasant consultant to making actually uncomplicated internet sites!

Note: CD-ROM/DVD and different supplementary fabrics should not incorporated as a part of book file.

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Sample text

Notice that there’s a healthy amount of JavaScript here. As you find out in Chapter 3, you have a number of different ways of making JavaScript do what it has to do. So the code I show in Listing 2-1 is just one way to write it. txt, and here’s all the text it contains: This text was fetched using Ajax. That’s the code for your first Ajax example. ), you have to have a firm grasp on the JavaScript. Many Web developers coming to Ajax for the first time don’t know as much JavaScript as they’re going to need, so the rest of this chapter is dedicated to helping you get that essential JavaScript foundation.

As you enter a word, this example looks up words that might match in a dictionary on the server and displays them, as you see in Figure 1-3. If you see the right one, just click it to enter it in the text field, saving you some typing. 13 14 Part I: Getting Started Figure 1-3: An autocomplet e example. Chatting with friends Because Ajax excels at updating Web pages without refreshing the displayed page, it’s a great choice for Web-based chat programs, where many users can chat together at the same time.

Html from the ch02 folder on the companion Web site. Open the file in your browser. As shown in Figure 2-3, this page uses JavaScript to write a message to the Web page when that page loads. html is a complete success, and everything’s off to a good start. Figure 2-3: A first script. 27 28 Part I: Getting Started Oh, those semicolons Technically speaking, each line of JavaScript should end with a semicolon (;) just like in Java if you’re at all familiar with that language. write(“You’re using JavaScript”);

A First Script

Including the semicolon is the correct way of doing things in JavaScript, and that’s the way I do it in this book.

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