![]() Instead the div I used for the window could have 2 inner divs, one that you use to load the actual content, one with the loading gif, and you just switch which of those two is visible based on your state (waiting for content or done waiting).īesides that, this can be optimized quite a bit by storing references to the DOM elements involved (like such: var myWindow = $('div#myWindow'). I recommend fixing this code such that ideally, you can re-use the same window (unless you want to have multiple ones open at the same time), and that you don't destroy and recreate the loading gif content every time. But the basic gist is, that you start showing the window with the loading image (and/or text) in it, and in your ajax success callback you remove the loading image and replace it with your content. Prerequisites: GetMinutes (), GetSeconds. The setTimeout () method calls a function or evaluates an expression after a specified number of milliseconds. JavaScript code that set the timer to 2 minutes and when the time is up the Page alert times up. This is a very crude example and you should definetly change some stuff around, also based on your situation that I know little about. Return Value: It returns a number representing the ID value of the timer that is set. start your asynchronous ajax call and supply a success callback that receives the content that should be shown in the windowĪs you can see, the success callback overwrites the inner HTML of your Kendo Window so the loading gif is gone, and the page is showing. Var kendoWindow = $('div#kendoWindowHere').data('kendoWindow') ģ. Open the window with the loading gif showing: $('div#kendoWindowHere').kendoWindow() Ģ. Setup the Kendo UI window, hide by default: Setup some HTML for your re-usable window:Ģ. Request.I can't find a way to do it with the built-in parameters, functions and events, but it's fairly simple to produce loading behavior yourself:ġ. ![]() Defining event listener for readystatechange event Request.open("GET", "greet.php?fname=John&lname=Clark") The following example will show you how to make an Ajax GET request in JavaScript. The GET request is typically used to get or retrieve some kind of information from the server that doesn't require any manipulation or change in database, for example, fetching search results based on a term, fetching user details based on their id or name, and so on. In the following section we'll take a closer look at how Ajax requests actually works. POST for a detailed comparison of these two methods. Data sent through POST method will not visible in the URL. Update the three files with the following content. Example-2: Create a 10 second timer with a progress bar. Let's introduce a progress bar to mimic a typical file download environment. Mission accomplished But, can we make the project better Yes, we can. But, in POST method, the data is sent to the server as a part of the HTTP request body. The timer starts at 10 and keeps dropping every second until the reading is zero and stops. In GET method, the data is sent as URL parameters. Whereas, the POST method is used to send large amount of data, such as form data. The GET method is generally used to send small amount of data to the server. This is primarily used for HTTP POST requests, since the HTTP GET request doesn't have a request body, just request headers. Note: The send() method accepts an optional body parameter which allow us to specify the request's body. In the following section we'll discuss each step involved in this process one by one: Sending Request and Retrieving the Responseīefore you perform Ajax communication between client and server, the first thing you must do is to instantiate an XMLHttpRequest object, as shown below: the browser will not halt the script execution until the server response comes back. ![]() Since Ajax requests are usually asynchronous, execution of the script continues as soon as the Ajax request is sent, i.e. The following illustrations demonstrate how Ajax communication works: 10 seconds <-append load-post.php echo value here.![]() To perform Ajax communication JavaScript uses a special object built into the browser-an XMLHttpRequest (XHR) object-to make HTTP requests to the server and receive data in response.Īll modern browsers (Chrome, Firefox, IE7+, Safari, Opera) support the XMLHttpRequest object. Ajax to mimic this functionality, its really simple and easy to use. Other data exchange format such as JSON, HTML, or plain text can be used instead of XML. Tip: Don't get confused by the term X (i.e.
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