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iframes and alt attribute

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From: Dona Patrick
Date: Mar 16, 2016 12:35PM

Good afternoon,

We are having a discussion at work about using alt attributes in iframes
(embedded videos) (in HTML5 pages).

Some folks are insisting that the alt attribute is included with every
iframe. I've only ever heard that the title attribute is required.

The reason this is an issue is because the CMS makes it difficult to add
the alt attribute, whereas the title attribute is automatically added.

So the question is this: is the alt attribute required for iframes?

Apologies if this has already been discussed. I did not search the archives.

Thanks,

Dona