I just wanted to offer this for perusal, since it was harder than I expected to find certain answers to doing this without jQuery on Codepen.
There are one or two workarounds I used (crossorigin.me and a cache randomizer). I also used my own custom twitter link, because my understanding was it would improve load times quite a bit in a real world application.
Any feedback you guys have would be great. There’s obviously not much stylizing going on, I’ll be doing that later.