New block: core/transcript

[joedolson]

What problem does this address?

A text transcript is an important type of alternative content for timed media, like audio and video. WordPress offers standard blocks for displaying audio and video, but does not provide a standardized way to display transcripts.

What is your proposed solution?

A transcript block could ensure a stable and standardized way to add alternative content for timed media.

For the disclosure model, the transcript block could consist of a details and summary interaction, where the summary element has a contained heading. The heading should be configurable by the user, but by default should either be h2 or h3.

The details/summary pattern isn't fully mature, but does have broad support. I would still suggest using it rather than rolling a custom disclosure widget, thinking long term. See: https://www.scottohara.me//blog/2022/09/12/details-summary.html

E.g.

<details>
    <summary><h2>Transcript</h2></summary>
    <div>
       <p>Text content.</p>
     </div>
</details>

[carolinan]

I could see more use cases for a details summary block, perhaps Transcript could be an alias name for such a block.

This block was suggested in the past but the issue was closed because of limited support in IE 11. I don't believe that is valid anymore.

What inner blocks should be allowed?