After testing 4 options, I settled on footable, because of the simplicity of deployment. Collapse this browser and you might see the collapse.
Tablepress also works well, and is probably better for some complex jobs. In fact, I used both on one particular job, footbale for a schedule, and tablepress for a complex set of presenter lists, sorted many ways on different pages.
I used this fake table for testing – it may not now collapse as I had it once, because of other changes. This is, after all, a test to destruction, and look for odd interactions website.