Telerik blogs

Tag: JavaScript

  • Web

    JavaScript Timing Events

    This article is taken from W3Schools.   With JavaScript, it is possible to execute some code NOT immediately after a function is called, but after a specified time interval. This is called timing events. It's very easy to time events in JavaScript. The two key methods that are used are: setTimeout() - executes a code some time in the future clearTimeout() - cancels the setTimeout() setTimeout() Syntax var t=setTimeout("javascript statement",milliseconds);  The setTimeout() method returns a value - In the statement above, the value is stored in a variable called t. If you want to cancel this setTimeout(), you can refer to it using the variable name. The first parameter of setTimeout() is a...
    by Iana Tsolova
    May 27, 2021 2 min read
  • Web

    How do I pause execution in JavaScript?

    The current article is taken from javascript.faqts Contributors: ha mo, Daniel LaLiberte, Brent Boyer, Martin Honnen, mercury rising,   There is no true wait, sleep, or similar function in either the core JavaScript language or in client side JavaScript. Client side JavaScript however provides     setTimeout('js code here', delayInMilliseconds) which allows you to schedule execution of piece of script and setInterval('js code here', intervalInMilliseconds) which allows you to periodically execute a piece of script. So if you wanted (pseudo code) statement1;  wait (someDelay);  statement2;  you would stuff the code into functions: function statement1 () {      // your code here  }  function statement2 () {      // your code here  }    and call statement1();  setTimeout('statement2()', someDelay);      If you wanted (pseudo...
    by Iana Tsolova
    May 27, 2021 3 min read
  • Release

    A new series of blog posts coming up

    Hi all,   Telerik’s support is always focused at satisfying customer needs – if you have used our controls for some time now, I guess you have already found that out. If you have just started getting familiar with our products – give us a try ;)   Our support services however, being targeted on our products only, cannot provide you with custom solutions, although we try to help as much as possible. That is why we decided to start a new series of blog posts aimed at different aspects of ASP.NET development. The content is gathered from various newsgroups, blog posts, tutorials in...
    by Georgi Tunev
    May 27, 2021 2 min read
  • Web ASP.NET AJAX

    Don't Use BODY ONLOAD in ASP.NET AJAX Websites

    In the past developers used <body onload="..."> to execute some script as soon as the page is loaded. Nowadays this is rather old-fashioned, no matter how you look at it. What's more, it doesn't work as expected in ASP.NET AJAX websites. Consider the following example:   <body onload="MyFunction()">    <script type="text/javascript">       function MyFunction()     {        var myAjaxControl = $find("myAjaxControlClientID");        myAjaxControl.doSomething();     }    </script>    </body>    The client-side page load event is fired by the browser as soon as all HTML and scripts have been loaded. However, this happens before the controls' client-side instances have been created. As a result, myAjaxControl will be null and the doSomething() method will trigger a Javascript error. So, a lot better approach...
    by Iana Tsolova
    May 27, 2021 1 min read
  • Web

    Internet Explorer JavaScript Performance Tip - use the &quot;children&quot; property

    Today I was profiling the initialization time of RadTreeView for ASP.NET Ajax and found out that the biggest bottleneck was traversing the DOM tree. The code looks something like this: //get_childListElement() returns an HTML element  var childNodes = parent.get_childListElement().childNodes;  for (var i = 0, length = childNodes.length; i < length; i++)  {       var childNode = childNodes[i];         //Perform additional initialization  }  I tested with 10000 elements and in IE7 I got about 25000ms whilst in FireFox the total time was around 33ms (Core 2 Duo @ 2.33GHz). Quite a difference if you ask me. I thought that there may be some IE specific method/property which could perform better and I dug into MSDN. And a few minutes later I found the children property!!! Apparently the children collection contains only HTML elements (whilst childNodes is full of...
    by Iana Tsolova
    May 27, 2021 2 min read
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