Why Is There No Alt Attribute Associated With The Poster ... - GitHub

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This repository was archived by the owner on Jul 30, 2019. It is now read-only. Why is there no alt attribute associated with the poster attribute on a video element (or, what's the accessible name calculation on a video element)? #1431Copy linkCopy linkClosedClosedWhy is there no alt attribute associated with the poster attribute on a video element (or, what's the accessible name calculation on a video element)?#1431Copy linkAssignees LabelsFeature requestNeeds incubationa11yMilestoneWhen it's ready

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OwenEdwardsopened on May 11, 2018Issue body actions

The <video> element provides support for a poster image which acts as a visual placeholder for the video when it is not playing. The image conveys information about what video will play for a sighted user, but unlike other images (e.g. <img>, <svg>) there is no explicit mechanism to provide a textual alternative for non-sighted users. This is separate from the accessibility/alternative for the video file/stream while being played - the poster image provides additional information which is conveyed statically and may include text or other information which ought to be made available to a non-sighted user (indeed, the poster image could include information which is not present anywhere in the video).

Currently, the only mechanism to provide this kind of labeling is using aria-label or aria-labelledby; does HTML have no plan to make this native feature accessible with a native attribute?

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