CUNY Academic Commons

There are a few existing tools for requiring alt tags, but IMO none are great.

I wrote an implementation that integrates tightly with the Media Library tools for a different project. It's currently somewhat tightly coupled to that project, but it may be possible to pull it out for use in the Commons (maybe even as an interim step for a more general-purpose tool) https://github.com/livinglab/webwork-for-wordpress/blob/master/src/containers/UploaderContainer.js#L55