BREAKING CHANGE:
Switching default of `emitDistinctChangesOnlyDefaultValue`
which changes the default behavior and may cause some applications which
rely on the incorrect behavior to fail.
`emitDistinctChangesOnly` flag has also been deprecated and will be
removed in a future major release.
The previous implementation would fire changes `QueryList.changes.subscribe`
whenever the `QueryList` was recomputed. This resulted in an artificially
high number of change notifications, as it is possible that recomputing
`QueryList` results in the same list. When the `QueryList` gets recomputed
is an implementation detail, and it should not be the thing that determines
how often change event should fire.
Unfortunately, fixing the behavior outright caused too many existing
applications to fail. For this reason, Angular considers this fix a
breaking fix and has introduced a flag in `@ContentChildren` and
`@ViewChildren`, that controls the behavior.
```
export class QueryCompWithStrictChangeEmitParent {
@ContentChildren('foo', {
// This option is the new default with this change.
emitDistinctChangesOnly: true,
})
foos!: QueryList<any>;
}
```
For backward compatibility before v12
`emitDistinctChangesOnlyDefaultValue` was set to `false. This change
changes the default to `true`.
PR Close#41121
Previously, the indentation of code snippets in the "Cheat sheet" guide
was done using `<br>` elements (for line breaks) and ` ` HTML
entities (for space). This was laborious and put the onus on the author
to remember to use these symbols (instead of regular whitespace
characters).
(Discussed in
https://github.com/angular/angular/pull/41051#discussion_r585651621.)
This commit changes the way `<code>` elements are styles inside the
"Cheat sheet" guide to allow using regular whitespace characters in code
snippets. It also changes all `<br>`/` ` occurrences to `\n`/` `
respectively to make code snippets more readable in the source code.
PR Close#41051
This commit removes an unnecessary wrapper `<div>` from the
"Cheat sheet" guide. The CSS styles that referenced the element's ID
(`#cheatsheet`) have been updated to use `.page-guide-cheatsheet`
instead.
PR Close#41051
This change fixes an incompatibility between the old `@angular/http` package
and its successor (`@angular/common/http`) by re-introducing the types that were supported before.
It now allows to use number and boolean directly as HTTP params, instead of having to convert it to string first.
Before:
this.http.get('/api/config', { params: { page: `${page}` } });
After:
this.http.get('/api/config', { params: { page }});
`HttpParams` has also been updated to have most of its methods accept number or boolean values.
Fixes#23856
BREAKING CHANGE:
The methods of the `HttpParams` class now accept `string | number | boolean`
instead of `string` for the value of a parameter.
If you extended this class in your application,
you'll have to update the signatures of your methods to reflect these changes.
PR Close#40663
Update the HTTP guide and associated example to demonstrate
how an interceptor can be used to provide a custom JSON parser.
Resolves#21079
PR Close#40645
Initially raised due to #39509, this change updates our
"Support policy and schedule" with the same disclaimer
from the "Release frequency" section above.
PR Close#40770
Observables are not the only async mechanism that Angular employs.
This change respects that application developers are not required to
use Observables in their own application architecture.
Closes#39155
PR Close#39237
This commit updates the documentation style guide
so that it is in line with current standards, those
of Google as well as those within the Angular docs.
PR Close#36281
This commit includes some general improvements to heading styles
(font-weight, margin/padding). It also adds a horizontal separator above
`<h2>` headings to segment important sections more easily.
(As a consequence, we can remove several `<hr />` elements right before
`<h2>` headings.)
Co-authored-by: Stefanie Fluin <sjtrimble@gmail.com>
PR Close#40427
David Shevitz
Alan Agius
Misko Hevery
pniedermeyer
George Kalpakas
LordMsz
Chris
Daniel
Aristeidis Bampakos
Kapunahele Wong
Pete Bacon Darwin
Theoklitos Bampouris
cexbrayat
George Kapris
Amadou Sall
DerekRTP
Dmitrij Kuba
Alexey Elin
Brandon Winchester
Dan Levy
mgechev
Jeremy Elbourn
Nicholas Papadopoulos
Mickael Istria
Kanstantsin Kamkou
Viktor Uhryn
Teri Glover
