What's the likelihood that he's supporting engines going back a decade? Modern rendering engines and CSS handle that pretty well. IE 8 is 8 years old. Bootstrap

What's the likelihood that he's supporting engines going back a decade? Modern rendering engines and CSS handle that pretty well. IE 8 is 8 years old. Bootstrap 3 supports IE 8 and has modals. Point being, you can either write up a simple modal if you are targeting semi-modern browsers and don't need much, or you can use one of a dozen libraries that do this, but 27 files sounds pathological.