Use Custom Missing Image Graphics Using Dojo

By  on  

A few months back I posted an article about how you can use your own "missing image" graphics when an image fails to load using MooTools and jQuery. Here's how to do the same using Dojo.

The HTML

<p><img src="http://cnn.com/image-that-doesnt-exist.jpg" alt="Missing 1" class="missing1" /></p>
<p><img src="http://cnn.com/demo/image-that-doesnt-exist-2.jpg" alt="Missing 2" class="missing2" /></p>

We'll delegate the image to display by class -- be sure to give the appropriate class to each image. We'll be using two images for the sake of this demo.

The Dojo JavaScript

dojo.addOnLoad(function() {
	/* version 1 */
	dojo.query('img.missing1').connect('onerror',function() {
		dojo.attr(this,{
			src: 'https://davidwalsh.name/demo/missing-image.jpg',
			alt: 'Sorry!  This image is not available!',
			style:'border: 1px solid #f00;width:110px;height:40px;'
		});
	});
	/* version 2 */
	dojo.query('img.missing2').connect('onerror',function() {
		dojo.attr(this,{
			src: 'https://davidwalsh.name/demo/missing-image-2.jpg',
			alt: 'Sorry!  This image is not available!',
			style:'border: 1px solid #f00;width:30px;height:28px;'
		});
	});
});

We query the DOM for both classes and replace any broken images (we can tell there ways a problem because the onError event fires) with the two designated images. Simple!

Of course you should always do what you can on the server side to prevent broken images -- the small javascript snippet above should be used as a safeguard.

Recent Features

Incredible Demos

  • By
    MooTools TwitterGitter Plugin

    Everyone loves Twitter. Everyone loves MooTools. That's why everyone should love TwitterGitter, a MooTools plugin that retrieves a user's recent tweets and allows the user to format them however the user would like. TwitterGitter allows the user to choose the number of...

  • By
    Animated Progress Bars Using MooTools: dwProgressBar

    I love progress bars. It's important that I know roughly what percentage of a task is complete. I've created a highly customizable MooTools progress bar class that animates to the desired percentage. The Moo-Generated XHTML This DIV structure is extremely simple and can be controlled...

Discussion

    Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!