Bulletproof Ajax by Jeremy Keith

By Jeremy Keith

Step-by-step consultant unearths most sensible practices for boosting websites with Ajax

  • A step by step consultant to improving websites with Ajax.
  • Uses revolutionary enhancement ideas to make sure sleek degradation (which makes websites usable in all browsers).
  • Shows readers how one can write their very own Ajax scripts rather than hoping on third-party libraries.

Web website designers love the assumption of Ajax--of developing websites within which details will be up-to-date with no clean the total web page. yet when you aren't hard-core programmers, bettering pages utilizing Ajax could be a problem. much more of a problem is ensuring these pages paintings for all clients. In Bulletproof Ajax, writer Jeremy Keith demonstrates how builders happy with CSS and (X)HTML can construct Ajax performance with no frameworks, utilizing the guidelines of sleek degradation and innovative enhancement to make sure that the pages paintings for all clients. all through this step by step advisor, his emphasis is on most sensible practices with an method of development Ajax pages referred to as Hijax, which improves flexibility and avoids worst-case scenarios.

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If the server takes a long time to respond, the browser will effectively stop. One of the great advantages of Ajax is its ability to process requests in the background while the user carries on interacting with the browser. To make use of this, always pass a value of true as the third argument in the open method. ext", true); User name and password There are two other optional arguments that you can include in the open method. You can specify a user name and a password to be sent to the server.

Classes are created just like functions. var Car = function() { }; Using the this keyword, you can create properties and methods for this class. "); }; }; The variable wheels is a property. The start function is a method. start(); The first statement creates a new instance of the Car class called mercedes. The second statement executes the start method of the object. wheels ); Don’t worry if all this object stuff isn’t clear to you. Object-oriented programming can be a tricky subject to understand.

The loop executes three times: the length of the fruit array. 28 Chapter 2 FUNCTIONS A function is a self-contained block of statements. Functions are very good at holding reusable code. You can declare a function by using the function keyword followed by the name of the function you want to create: function myFunction() { // do something } Later on, you can execute the function like this: myFunction(); The parentheses are there to take arguments. Arguments are values that you can pass to a function.

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