TL;DR: It's like clsx, but for `style` props.
TL;DR: An idea for a small library that makes it easier to abort Promise chains.
TL;DR: Use template (not div) and textContent (not innerText).
TL;DR: If you need a double rAF() for a transition to work, getComputedStyle().opacity may be a cheap, synchronous alternative.
TL;DR: Returning a promise in `new Promise()` never resolves, but returning a promise in `.then()` does.