Anyone who knows anything about web accessibility knows that images need alternative, or ALT, text assigned to them. This is because screen readers can’t understand images, but rather read aloud the alternative text assigned to them. In Internet Explorer we can see this ALT text, simply by mousing over the image and looking at the yellow tooltip that appears. Other browsers (correctly) don’t do this. The HTML for inserting ALT text is:
But surely there can’t be a skill to writing ALT text for images? You just pop a description in there and you’re good to go, right? Well, kind of. Sure, it’s not rocket science, but there are a few guidelines you need to follow…
Spacer images and missing ALT text
Spacer images should always be assigned null ALT text, or alt=”” . This way most screen readers will completely ignore the image and won’t even announce its presence. Spacer images are invisible images that pretty most websites use. The purpose of them is, as the name suggests, to create space on the page. Sometimes it’s not possible to create the visual display you need, so you can stick an image in...
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