JAVASCRIPT - How do i abort an Image?

**quantass** · 02-13-2005 06:54 PM

I would like to abort a loading <IMG>. I've tried fireEvent to throw an "onabort", which does occur however the <IMG> clearly completes loading totally disregarding the onabort event. How do i "abort" a loading in image in Javascript?

I've also tried setting .src="" though this creates a onerror message which Im trying to avoid.

**CompGeek01** · 02-14-2005 11:28 AM

I tried the following, which I found through Google. However, it didn't work. Honestly I've never even heard of this and I don't know why you'd really need to use it. I'm sure it must have some application. It sounds as if you don't want to notify the user that they've canceled the image..more that you want to just cancel the image altogether, which is it?

Code:

<HTML>
<HEAD> 
<TITLE>The onAbort Event Handler of the Image Object</TITLE> 
<SCRIPT LANGUAGE = "JavaScript"> 
function ImageAborted() { 
     if (window.confirm("The image is not loaded completely. Continue loading?")) 
     {
          document.images[0].src = "Dvc.jpg"
     }
} 
</SCRIPT> 
</HEAD> 
<BODY>
<CENTER><H1>A Demonstration of onAbort with a Huge Image</H1></CENTER> 
<CENTER>
<IMG SRC="Dvc.jpg" onAbort="ImageAborted()">
</CENTER><P>
</BODY>
</HTML>

**ScaryBinary** · 02-19-2005 08:30 PM

How do you know when an image should be aborted? If you know you're going to abort it ahead of time, then why load it? I'm guessing here that the image starts preloading, but you want to cancel it under some certain condition, or maybe some user input or something?

DevGuru says this regarding images and aborting them:

The onAbort event handler is used to execute certain JavaScript code whenever an abort event occurs, such as when the user stops the loading of an image by clicking a link or a Stop button.

Just curious.

I dug into the deep, dark world of javascript events, and couldn't find anything that would actually cause an image to stop loading (other than the user clicking the "Stop" button on his browser or following a link, but those would stop all images {i think} from loading, not just a particular one) ... only various ways to invoke the onAbort handler, which won't necessarily abort the image.

Sorry.

**ScaryBinary** · 02-19-2005 08:45 PM

Just thought of this, might be worth a shot (success not guaranteed!

).

If you are creating the images in javascript, like

Code:

myImage = new Image();
myImage.src = "myimage.gif";

then you might try just deleting it when you need to like

Code:

delete myImage;

Not sure what will happen if the image happens to be loading at the time - if you'll get an error or what - but the "delete" keyword is indeed used for deleting javascript objects...

See DevGuru (Scroll down a bit for the delete operator).

**quantass** · 02-24-2005 05:46 AM

Thanks for the info. Yes indeed I am trying to abort a downloading unseen image. I'm trying to make my own quick and dirty remote assistance app via javascript and IMG objects and if the user attempts to refresh the screen i want to abort all current dloading images.

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