Frames must have non-empty title attribute
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<iframe> elements in the document must have a title that is not empty to describe their contents to screen reader users.
The Algorithm, in Simple Terms
Ensure that all iframe and frame elements contain a unique and non-empty title attribute.
Why this is Important
Screen reader users rely on a frame title to describe the contents of the
frame. Navigating through frames and iframes can quickly become difficult and confusing for users of this technology if the frames are not marked with a
How to Fix the Problem
<iframe> elements have titles and that no titles are repeated.
- HTML 4