While true / loop until break about infra

[zcorpan]

http://w3c.github.io/webvtt/#collect-a-webvtt-block

Loop: Run these substeps in a loop:

... break out of loop

[zcorpan]

"While true:" SGTM. Infra uses "While <condition>:" in its algorithms, and it seems straightforward to say true for the condition.

Labels for loops, and being able to break out of a specific one with nested loops, is also necessary...

[foolip]

With "While true:", how would one break the loop? Just "break"?

[zcorpan]

Yeah.

[zcorpan]

Related: #56 #22

[foolip]

https://fullscreen.spec.whatwg.org/#collect-documents-to-unfullscreen now uses this.