The `AsyncPipe.transform<T>(emitter)` method must infer the `T`
type from the `emitter` parameter. Since we changed the `AsyncPipe`
to expect a `Subscribable<T>` rather than `Observable<T>` the
`EventEmitter.subscribe()` method needs to have a tighter signature.
Otherwise TypeScript struggles to infer the type and ends up making
it `unknown`.
Fixes#40637
PR Close#40644
fix https://github.com/angular/components/issues/21674
When setting `ngZoneRunCoalescing` to true, `onStable` is not emitted correctly.
The reason is before this commit, the code looks like this
```
// Application code call `ngZone.run()`
ngZone.run(() => {}); // step 1
// Inside NgZone, in the OnInvoke hook, NgZone try to delay the checkStable()
function delayChangeDetectionForEvents(zone: NgZonePrivate) {
if (zone.lastRequestAnimationFrameId !== -1) { // step 9
return;
}
zone.lastRequestAnimationFrameId = zone.nativeRequestAnimationFrame.call(global, () => { // step 2
if (!zone.fakeTopEventTask) {
zone.fakeTopEventTask = Zone.root.scheduleEventTask('fakeTopEventTask', () => {
zone.lastRequestAnimationFrameId = -1; // step 3
updateMicroTaskStatus(zone); // step 4
checkStable(zone); // step 6
}, undefined, () => {}, () => {});
}
zone.fakeTopEventTask.invoke();
});
updateMicroTaskStatus(zone);
}
function updateMicroTaskStatus(zone: NgZonePrivate, ignoreCheckRAFId = false) {
if (zone._hasPendingMicrotasks ||
((zone.shouldCoalesceEventChangeDetection || zone.shouldCoalesceRunChangeDetection) &&
zone.lastRequestAnimationFrameId !== -1)) { // step 5
zone.hasPendingMicrotasks = true;
} else {
zone.hasPendingMicrotasks = false;
}
}
function checkStable(zone: NgZonePrivate) {
if (zone._nesting == 0 && !zone.hasPendingMicrotasks && !zone.isStable) { // step 7
try {
zone._nesting++;
zone.onMicrotaskEmpty.emit(null);
...
}
// application ref subscribe onMicroTaskEmpty
ngZone.onMicroTaskEmpty.subscribe(() => {
ngZone.run(() => { // step 8
tick();
});
});
```
And the process is:
1. step 1: application call ngZone.run()
2. step 2: NgZone delay the checkStable() call in a requestAnimationFrame, and also set
zone.lastRequestAnimationFrameId
3. step 3: Inside the requestAnimationFrame callback, reset zone.lastRequestAnimationFrameId first
4. step 4: update microTask status
5, step 5: if zone.lastRequestAnimationFrameId is -1, that means no microTask pending.
6. step 6: checkStable and trigger onMicrotaskEmpty emitter.
7. step 7: ApplicationRef subscribed onMicrotaskEmpty, so it will call another `ngZone.run()` to process
tick()
8. step 8: And this new `ngZone.run()` will try to check `zone.lastRequestAnimationFrameId` in `step 9`
when trying to delay the checkStable(), and since the zone.lastRequestAnimationFrameId is already reset
to -1 in step 3, so this ngZone.run() will run into step 2 again.
9. And become a infinite loop..., so onStable is never emit
In this commit, the `zone.lastRequestAnimationFrameId` reset is moved after `checkStable()` call.
PR Close#40540
The codebase currently contains several `EMPTY_ARRAY` constants,
and they can end up in the bundle of an application.
A recent commit 6fbe219 tipped us off
as it introduced several `noop` occurrences in the golden symbol files.
After investigating with @petebacondarwin,
we decided to remove the duplicated symbols.
This probably shaves only a few bytes,
but this commit removes the duplicated functions,
by always using the one in `core/src/utils/empty`.
PR Close#40587
Previously, in `_mismatch()`, the `DefaultIterableDiffer` first checks
`_linkedRecords` for `itemTrackBy`, then checks `_unlinkedRecords`.
This cause the `DefaultIterableDiffer` to move "later" items that match the
`itemTrackBy` from the old collection, rather than using the "earlier" one.
Now we check `_unlinkedRecords` first, so that the `DefaultIterableDiffer`
can give a more stable and reasonable result after diffing. For example,
rather than (`a1` and `a2` have same trackById)
```
a1 b c a2 => b a2 c a1
```
we get
```
a1 b c a2 => b a1 c a2
```
where a1 and a2 retain their original order despite both
having the same track by value.
Fixes#23815
PR Close#23941
The injector system uses a bloom filter to determine if a token is
possibly defined in the node injector tree, which is stored across
multiple bloom buckets that each represent 32 bits of the full 256-bit
wide bloom hash. This means that a computation is required to determine
the exact bloom bucket which is responsible for storing any given 32-bit
interval, which was previously computed using three bitmask operations
and three branches to derive the bloom bucket offset.
This commit exploits the observation that all bits beyond the low 5 bits
of the bloom hash are an accurate representation for the bucket offset,
if shifted right such that those bits become the least significant bits.
This reduces the three bitmask operations and three branches with a
single shift operation, while additionally offering a code size
improvement.
PR Close#40489
Because the query now has `flags` which specify the mode, the static query
instruction can now be remove. It is simply normal query with `static` flag.
PR Close#40091
Previous implementation would fire changes `QueryList.changes.subscribe`
whenever the `QueryList` was recomputed. This resulted in 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 which determines
how often change event should fire.
This change introduces a new `emitDistinctChangesOnly` option for
`ContentChildren` and `ViewChildren`.
```
export class QueryCompWithStrictChangeEmitParent {
@ContentChildren('foo', {
// This option will become the default in the future
emitDistinctChangesOnly: true,
})
foos!: QueryList<any>;
}
```
PR Close#40091
This commit updates the logic that calculates `useFactory` function arguments to avoid relying on `instanceof`
checks (thus always retaining symbols) and relies on flags that DI decorators contain (as a monkey-patched property).
Another perf benefit is having less megamorphic reads while calculating args for the `useFactory` call: we used to
check whether a token has `ngMetadataName` property 4 times (in worst case), now we have just 1 megamorphic read in
all cases.
Closes#40143.
PR Close#40145
The `template` and `isInline` fields were previously stored in a nested
object, which was initially done to accommodate for additional template
information to support accurate source maps for external templates. In
the meantime the source mapping has been accomplished in a different
way, and I feel this flattened structure is simpler and smaller so is
preferable over the nested object. This change also makes the `isInline`
property optional with a default value of `false`.
PR Close#40383
When we attach a `ViewRef` to a `ViewContainerRef`, we save a reference to the container
onto the `ViewRef` so that we can remove it when the ref is destroyed. The problem is
that if the container's `hostView` is destroyed first, the `ViewRef` has no way of knowing
that it should stop referencing the container.
These changes remove the leak by not saving a reference at all. Instead, when a `ViewRef`
is destroyed, we clean it up through the `LContainer` directly. We don't need to worry
about the case where the container is destroyed before the view, because containers
automatically clean up all of their views upon destruction.
Fixes#38648.
PR Close#40219
In some browsers, notably a mobile version of webkit on iPad, the
result of calling `DOMParser.parseFromString()` returns a document
whose `body` property is null until the next tick of the browser.
Since this is of no use to us for sanitization, we now fall back to the
"inert document" strategy for this case.
Fixes#39834
PR Close#40107
The `ɵɵngDeclareComponent` calls are designed to be translated to fully
AOT compiled code during a build transform, but in cases this is not
done it is still possible to compile the declaration object in the
browser using the JIT compiler. This commit adds a runtime
implementation of `ɵɵngDeclareComponent` which invokes the JIT compiler
using the declaration object, such that a compiled component definition
is made available to the Ivy runtime.
PR Close#40127
The trustConstantHtml and trustConstantResourceUrl functions are only
meant to be passed constant strings extracted from Angular application
templates, as passing other strings or variables could introduce XSS
vulnerabilities.
To better protect these APIs, turn them into template tags. This makes
it possible to assert that the associated template literals do not
contain any interpolation, and thus must be constant.
Also add tests for the change to prevent regression.
PR Close#40082
DI providers can be defined via `useFactory` function, which may have arguments configured via `deps` array.
The `deps` array may contain DI flags represented by DI decorators (such as `@Self`, `@SkipSelf`, etc). Prior to this
commit, having the `@Host` decorator in `deps` array resulted in runtime error in Ivy. The problem was that the `@Host`
decorator was not taken into account while `useFactory` argument list was constructed, the `@Host` decorator was
treated as a token that should be looked up.
This commit updates the logic which prepares `useFactory` arguments to recognize the `@Host` decorator.
PR Close#40122
The `ɵɵngDeclareDirective` calls are designed to be translated to fully
AOT compiled code during a build transform, but in cases this is not
done it is still possible to compile the declaration object in the
browser using the JIT compiler. This commit adds a runtime
implementation of `ɵɵngDeclareDirective` which invokes the JIT compiler
using the declaration object, such that a compiled directive definition
is made available to the Ivy runtime.
PR Close#40101
Internally we store lifecycle hooks in the format `[index, hook, index, hook]` and when
iterating over them, we check one place ahead to figure out whether we've hit found
a hook or an index. The problem is that the loop is set up to iterate up to `hooks.length`
which means that we may go out of bounds on the last iteration, depending on where
we started. This appears to happen under a specific set of circumstances where a
directive calls `detectChanges` from an input setter while it has `ngOnChanges` and
`ngAfterViewInit` hooks.
These changes resolve the issue by only iterating up to `length - 1` which guarantees that
we can always look one place ahead.
This appears to have regressed some time in version 10.
Fixes#38611.
PR Close#40206
The types of directives and pipes that are used in a component's
template may be emitted into the partial declaration wrapped inside a
closure, which is needed when the type is declared later in the module.
This poses a problem for JIT compilation of partial declarations, as
this closure is indistinguishable from a class reference itself. To mark
the forward reference function as such, this commit changes the partial
declaration codegen to emit a `forwardRef` invocation wrapped around
the closure, which ensures that the closure is properly tagged as a
forward reference. This allows the forward reference to be treated as
such during JIT compilation.
PR Close#40117
PR #39876 introduced an error where the `onDestroy` of `ComponentRef`
would only get called if `ngDevMode` was set to true. This was because
in dev mode we would freeze `TCleanup` to verify that no more
static cleanup would get added to `TCleanup` array. This ensured
that `TCleanup` was always present in dev mode. In production the
`TCleanup` would get created only when needed. The resulting cleanup
code was incorrectly indented and would only run if `TCleanup` was
present causing this issue.
Fix#40105
PR Close#40120
Pete Bacon Darwin
Misko Hevery
twerske
JiaLiPassion
cexbrayat
Sirui Chen
Alan Agius
Jessica Janiuk
JoostK
Alexey Elin
Max Schorradt
Andrew Kushnir
Kristiyan Kostadinov
Bjarki
Loic Yondjeu