Unbreakable Long URLs(reflow-long-urls)
Long URLs should wrap and not cause horizontal scrolling when the viewport is reduced.
Unwrapped long URL overflow
The long URL below is inside a narrow container. Without wrapping CSS, it causes overflow at 320px width:
https://this.is.a.really.long.url/with/no/breaks/that/can/cause/horizontal/scrolling/on/small/screens/or/zoom