By Kris Hadlock
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Extra resources for Ajax for Web Application Developers
This is due to the fact that we are not currently updating any Ajax requests because this property will be used to decipher if a request is in progress at any point in our application. 5. initialize(); After we construct the object, we immediately initialize its properties for use by the rest of the methods in the object. Updating the Request Object In an Ajax application, the most widely used method will most likely be the one that handles XHRs. This is the method that will handle all these requests and interact directly with the Ajax object.
Let's take a look at how these objects are instantiated and how they can be so powerful. Instances In order to create instances of a prototype-based object, we must first create a constructor function. The constructor function is the access point to all objects and therefore is the first item that is created in the object. A constructor function can receive unlimited parameters to specify certain attribute or property values. These values are what set one object apart from the next, and is another reason why objects are such a powerful force in programming.
We will start by covering how to create a method to handle making our XHR requests. Making Requests One of the most important functionalities of our Ajax object is making XHRs. In order to make this process more streamlined and easier to manage, we will be creating a method named makeRequest. This method will take three parameters: The first is a method in which to make the request, which will consist of either a POST or a GET method. The second parameter is the URL in which to make the request; this URL also will include our query string for passing data to the server when we make a request.