JQuery :: Delay Code Execution Until Image Preloader Is Complete?
Sep 4, 2011
I'm trying to build an image gallery and I want to shrink all the images a bit to allow for enlarging them on mouseover. I have it working fine locally, but when deployed to my server it doesn't work because the image files are still loading as the javascript executes. What I wind up with is the js using the image's alt tag's text size as the image size, which then gets resized to create a squashed image. What I want to do is preload all the thumbnail images before the the function to resize them gets called so the resize function has the proper dimensions of the images to do the transformation on. I'm using the jQuery.Preload plugin for my preloading functionality.
$(document).ready(function(){
[Code]...
My expectation of this code is that the enable_anim_resize() function will not be called until all the images are loaded, but I don't see any difference in this execution than if I just sequentially put in my resize code after the preload line and didn't use the onFinished callback for the preload method (example below:) $(document).ready(function(){ From my understanding of the documentation and examples of the preload plugin, the enable_anim_resize() function shouldn't be called until all images on the page are loaded, at which point the proper dimensions of these images should be available for correct resizing. Can anyone clue me in on what I'm missing here?
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Sep 3, 2009
have a select element that has a function attached via onchange. The function does some AJAX using the HTML_AJAX library.
When I use Firefox, if I select an item in the list, then the code executes in a timely manner, which means that I see lines 1 and 2 of my debugging output (displayed at the end of this posting). The code then displays a wait window. A second or so later, I see the third and final line of debugging output when the AJAX call has completed. The wait window then disappears. Yaay!
However (and you knew that this was coming even without the "IE" tag in the subject header, didn't you?), with Internet Explorer, I see no debug output nor wait window until AFTER the AJAX call has completed one second or so later. Suddenly, every line of debug output is displayed and the code is executed. Boo!
"Hold on! Are you saying that your Javascript code isn't being executed until after the AJAX call?"
This is what I am seeing with Internet Explorer! Even if I insert an alert() message in the code, I do not see it until AFTER the AJAX call has completed, even though it appears in the code before the AJAX call. Then, I see my alert() message. I do not see the wait window because it is displayed and immediately closed during the rush of code that executes after the AJAX call has completed. The whole idea of the wait window is to display while the AJAX call is working.
Here is the code for the select element:
HTML Code:
<select id="txtfieldNbNights" tabindex="4"
onblur="return ValidNbNights(this, 4, true);"
onchange="return OnNbNightsChanged(this);">
[Code]....
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Dec 28, 2010
In the inputbox on my local site i want a preloader for the autosuggest-function.
I have a script, that activate the class 'load', when i type one or more characters.
When i add/delete a character the preloader shows continues.
But how can i remove this class after 2 seconds? and when i add/remove a character how can i activate the class also for 2 seconds?[code]...
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Jun 24, 2009
is there any specific function in Javascript / jquery which delay the functionality
I use SLEEP() funciton in php to add delays .
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Dec 28, 2010
function test()
{
first();
second();
[code]....
i have this type ofsituationin my code, now many time function three is called before first and second complete execution.i want third to wait until first and second finish execution, dont want to use delay
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Nov 17, 2011
i have the following two pieces of code:
function slideOut() {
var $slidy = $('#slideout');
$slidy.animate({
right: parseInt($slidy.css('right'),10) == 0 ?
-$slidy.outerWidth() :
[Code]...
As long as i return false and the link is an anchor, i can see the menu slide out. Which is quite clear to me why. When i use a link with a href on another page though, the "jump" is executed before the animation ends most of the time even before it starts.
I would like the click to be delayed weather a certain condition kicks in, or some time passed to end the slide and then jump to the new page. I have been looking throughout the web and found no hint helping me to tackle this. delay() and setTimeout() dont seem to work the way i used them.
I am sure there is a way, its just the blind man's stick in my eye that keeps me from it. I hope someone can help me with this.
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May 20, 2010
I need my code to execute something AFTER all images are loaded, but I don't know how?
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Jun 9, 2009
I'm developing with jQuery quite long right now, but recently I spotted one big problem with execution of jQuery code in Safari and Chrome. So everything is working fine in these browsers until jQuery code is placed in one page. But when using for example tabs plug-in loaded with ajax and on this loaded page exists some extra jQuery code it isn't executed.Co page is loaded but nothing is happening with code which was included. This problem doesn't exists in IE, FF or Opera. It appears only in Safari and Chrome. The same problem is when I'm loading page with $.get, $.post or $.ajax query. So it doesn't affect tabs plug-in but
overall functionality. I was checking that with latest versions of jQuery and UI today.
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Jan 5, 2009
So I wanted to make an image preloader, I found a tutorial and followed as best I could (in all fairness it wasn't the best tutorial), but have got a little stuck.
I think all I need to do is enter the src of the images but I can't see where to put them and if I make an array or make a series of entries.
If anyone could give me a hand I'd really appreciate it as I'm a bit of a noob when it comes to javascript.
This is what I have so far.
Code JavaScript:
function ImagePreloader(images, call-back)
{
// store the call-back
[Code].....
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Jan 26, 2007
I want to build a loop, which cycles through a set of images and displays each image for a few seconds. In Firefox everything works fine, IE6 also executes the code but gives an script error in the status bar ("not implemented"). The relevant line of code is in red in the code below.
What could cause this ugly error in IE?
Code:
var imgpath = "imgtest/";
var errpic = 1;
var maxpic = 5;
function imgloop(actno) {
if(actno==maxpic) {
actno=1;
} else {
++actno;
}
preload(actno);
}
function imgshow(actno) {
document.mainpic.src = imgpath + actno + ".jpg";
imgloop(actno);
}
function delay(actno) {
setTimeout("imgshow(" + actno + ")", 5000);
}
function preload(actno) {
img = new Image();
img.onload = delay(actno);
img.src = imgpath + actno + ".jpg";
}
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Apr 30, 2007
Does anyone know why my image preloader isn't working?
<SCRIPT LANGUAGE="JavaScript">
var imagesArray = new Array();
imagesArray[0] = "url/image_1.jpg";
imagesArray[1] = "url/image_2.jpg";
imagesArray[2] = "url/image_1.jpg";
function preloader(){
var preload = new Image();
for (i=0; i < imagesArray.length; i++) {
preload.src = imagesArray[i];
}
}
function swapImage(imgIndex) {
document['imgBig'].src = imagesArray[imgIndex];
}
</script>
on bodyload I call preloader()
a link swaps the image swapImage(0) for example, but the images don't preload, they still end up loading when you click the swap link.
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Dec 5, 2011
Until now I have used the javascript function eval(), wrapped it in a try / catch block and showen him the error message if the javascript code was flawed.But this comes with the problem that if there is no error the script will be executed.So what I´d like to is use the jquery function globalEval(), wrap it in a try / catch block and display the error message if the script does not run sucessfully as I have done before,BUT:if the script would execute without an error I´d like to use some kind of preventDefault so that the script would not be executed at all and instead I could show the user a message that the script passed validation.I know that the way I propose is not possible as the script has to be executed somehow so that possible errors are generated...does anyone have an idea how to do what i propose ?
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Sep 1, 2009
I use this javascript in my site's header.php to preload five menu a:hover images:
<script type="text/javascript">
function preloader()
{
counter
[Code]...
in the body tag. I loads fine in IE7 and IE8, but Firefox seems to ignore it and not preload the images properly. What am I missing here? Did I make a mistake or does Firefox 3.5 just work differently with the loading of these five small images?[URL]...
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Feb 20, 2011
I have a rather large background image as part of the website layout. It's basically the header. It takes a while to load. I wonder if there is an AJAX or javascript loader that can show a loading gif before the image is loaded and then be removed so it doesn't show when you change pages next time.The CSS for the header is below.what code to use for a preloader? Would be grateful for info about this
CSS
#header{
height: 567px;
width:1000px; [code]....
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Jul 23, 2005
I need to use self.scrollTo(x,y) as the last action in a js function called
by a onClick event. It seems that the scrolling actually takes place, but
the document is then scrolling back to top when js code execution has ended.
In the following example I get this effect in IE6 with the third and fourth
calls, while the first two work fine. Code:
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Oct 19, 2009
I have discovered a XSS vuln in a website and I'd like to use this as a cookie grabber. If you can help, <removed>.
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Sep 22, 2006
Subject line would seem to say it all:
How does one trigger the execution of a method within an object or any
other code/function with the setting of an object property?
More elaboration for those who want it:
Suppose we have anObjectType, with a property .description, whose value
can be a string, and the value of .description actually describes the
structure of anObjectType as a string. (The details are not important
about how the structure is described, but if you want something concrete,
think of 'anObjectType' as a DOM Node of type NODE_ELEMENT, and
..description as the property .innerHTML.)
When an instance of anObjectType is created, the value of description is
created with the instance. Indeed, the value of description may not be
set with the construction of anObjectType, but it might be added to the
prototype of anObjectType.
But the property .description is not merely read-only. Fetching the value
of .description returns the string which describes the structure of the
object in a meaningful way.
When .description is set with a value of type string, the string is
checked to see if it properly describes a legally formed structured for
anObjectType, and the instance (and only that instance) of anObjectType is
completely re-built: it might possibly be destructed and then re-
constructed, or all properties (but not methods) which involve descendant
objects are changed to conform to the described structure.
The question is, the setting of a string value of the property
..description of object anObjectType does not automatically trigger a
method/methods (or an exception??) for doing something (such as
restructing the object) as a result of the setting of an object property.
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Mar 16, 2011
Don't really think this is related to jQuery but I thought I would post it here in case someone else was having a problem. I have a plug-in I made that uses an image preloader involving the jquery .load() function. Once all images are preloaded, a function is fired to initiate the plugin.bIf the image is already loaded in the cache, the script checks the .complete property of the image to see if it is true, then manually fires the callback function for the load script. Here is the code:
[Code]...
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Jun 11, 2010
I am showing an image possibly 957x30 pixels size on a page. Whenever there is a mouseover or hover on this image, it is swapped with another image (say 957x130 pixels) by expanding its division in slidedown fashion and stays visible for few seconds before swapping back with first image.
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Dec 23, 2009
Im currently creating a textbox with an AJAX auto-complete feature but have reached a wall. I can create a div below it with a list of results but now need to allow the user to select. I can setup it up with an onClick, easy. But I need help with the arrow buttons as that is how I would like it to function. The script only allows 5 results at a time with each having an id of 0 to 4. Each result is a div, below is this code (created by PHP):
PHP Code:
echo "<div id='".$i."' class='userSelect'>".$i.$row["friendName"]."<div>";
There is a JS file attached to the page this is echoed onto, so what would the code need to be on both the div (mouseup, mousedown...) and then the function that calls.
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Sep 29, 2009
I need to fadeout an image after a delay when a page is loaded, then redirect it to another page.
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Aug 5, 2010
I'm attempting to make a little slide show navigation box..thing, along the lines of what a lot of sports sites and, say, Gamespot use (digression: do these boxes have a technical name?).
My setup is pretty simple - I have a small PHP script that iterates over an image folder and pulls both the file name and last modified info from each image and stores them in an associative array. The array is json_encode()-ed. My jQuery $.get()'s the json, parses it, and then creates image elements based on the info. Cycle then does its thing and creates the slide show.
It all works, with one problem - the images don't appear upon a first visit to the site. They only appear on subsequent visits. This happens in the big three browsers (IE, FF, Chrome) without fail. A refresh is always necessary.
I'm not sure if it's a runtime issue, a cache issue, or if somehow Cycle isn't 'seeing' the images the first time. Please help. My code is below:
[Code]...
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Aug 1, 2011
Is there another JS function that I can use to force a time delay without having the code continue to run? I'm using the setTimeout() function but the call to this function doesn't stop the code flow. I need to stop the code flow while waiting. I guess I need a Sleep() type of JS function.What I'm trying to do is display some blank text on the screen using a for loop (I'm using <BR> to give the appearance of "opening up" a vertical window section in the browser) and I need this 'text' to complete before allowing the following code in the function to execute. The following code will display a Table with rows of data. I'm trying to use a timing function to give a visual impression of a window opening up just before the data displays.
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Feb 12, 2010
i'm trying to get to grips with Javascript for a Uni project, on this one i'm trying to show an image then replace that image with a .gif animation. Once the .gif has finished its animation once i want to replace it with a different image to the first.
the code I've come up with is running on a simple timer and loops endlessly, if anyone has any pointers that could help me or just tell me how to get my desired effect in a way i can understand then hopefully i can base my learning Javascript around that.
here is my code so far!
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script language="Javascript">
[Code].....
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Apr 2, 2007
I've been playing around with some means of testing image loading, and noticing that the "complete" property seems to default to true. Trying the following in the squarefree javascript shell:
I = new Image();
I.complete
yields "true".
Seems a bit odd -- obviously there's no src given yet, so is it really complete? Is this behavior defined that way on purpose? If so, what's the justification?
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Apr 27, 2010
I want to make a gallery with image loader. When image placed in JavaScript Image object finishes loading, the script includes it into HTML code and performs jQuery fadeIn effect on it.
The '.complete' property of the Java Script 'Image' object is perfect for this purpose(recognizing when image has finished loading) but the only problem is that Mozilla Firefox doesn't recognize this property and in this browser it's always true(always loaded) even if it's not. The script works perfectly in other browsers.
Does someone of you know what is the other way of recognizing whether the image finished loading or not?
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