The generated StackBlitz project and ZIP archives are no longer used
(and they are broken anyway), so removing them altogether to avoid
confusion.
Note: Still keeping the example project, because that is referenced in
the `setup` guide.
PR Close#31937
"app" is the default prefix for CLI projects when generating components.
This updates our examples to conform that that default
Closes#19778
PR Close#30789
This guide is not being shown publicly, and its test is currently being ignored.
Instead of deleting this test and guide, it may be repurposed in the future for a local development guide.
PR Close#28592
Also, remove `plnkr.json` for `service-worker-getting-started` guide,
since it is not used and ServiceWorker cannot work correctly in
plnkr/stackblitz anyway (e.g. no build step to re-compute hashes).
A zipper might be useful and can be added in a subsequent PR, but it is
currently broken (e.g. no dependency on `@angular/service-worker`).
PR Close#20165
`innerText` is not supported in Firefox prior to v45. In most cases (at least
the ones we are interested in), `innerText` and `textContent` work equally well,
but `textContent` is more performant (as it doesn't require a reflow).
From [MDN][1] on the differences of `innerText` vs `textContent`:
> - [...]
> - `innerText` is aware of style and will not return the text of hidden
> elements, whereas `textContent` will.
> - As `innerText` is aware of CSS styling, it will trigger a reflow, whereas
> `textContent` will not.
> - [...]
[1]: https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent#Differences_from_innerTextFixes#17585
