Even in the overloads, state that it can accept `null` and
`undefined`, in order to ensure easy composition with `async`.
Additionally, change the implementation to return `null` on an
`undefined` input, for consistency with other pipes.
BREAKING CHANGE:
The `slice` pipe now returns `null` for the `undefined` input value,
which is consistent with the behavior of most pipes. If you rely on
`undefined` being the result in that case, you now need to check for it
explicitly.
PR Close#37447
Adds overloads to the `transform` methods of `SlicePipe`,
to have better types than `any` for `value` and `any` as a return.
With this commit, using `slice` in an `ngFor` still allow to type-check the content of the `ngFor`
with `fullTemplateTypeCheck` enabled in Ivy:
<div *ngFor="let user of users | slice:0:2">{{ user.typo }}</div>
|
`typo` does not exist on type `UserModel`
whereas it is currently not catched (as the return of `slice` is `any`) neither in VE nor in Ivy.
BREAKING CHANGE
`SlicePipe` now only accepts an array of values, a string, null or undefined.
This was already the case in practice, and it still throws at runtime if another type is given.
But it is now a compilation error to try to call it with an unsupported type.
PR Close#30156
Andrea Canciani
JiaLiPassion
Joey Perrott
cexbrayat
Misko Hevery
Jason Aden