How do I handle a long gap on my résumé? - first time posting

My résumé shows a gap from a layoff and some health issues. I worked as a web developer before this. I am not sure how much to explain. Did anyone get past it?

Keep everything in writing and save the confirmation numbers. It saved me later.

I was hired after a 11-month gap. The manager said the skills test mattered more than the dates.