release: cut the v12.0.0-next.5 release (angular#41249)

Author: jessicajaniuk

CHANGELOG.md

@@ -1,3 +1,61 @@
+# 12.0.0-next.5 (2021-03-17)
+
+
+### Bug Fixes
+
+* **core:** Switch `emitDistinctChangesOnlyDefaultValue` to true ([#41121](https://github.com/angular/angular/issues/41121)) ([7096246](https://github.com/angular/angular/commit/70962465b5795f0a192f745016b1c461e7c8790b))
+
+
+### Features
+
+* **compiler-cli:** introduce HttpContext request context ([#25751](https://github.com/angular/angular/issues/25751)) ([1644d64](https://github.com/angular/angular/commit/1644d64398491d4a324a5eee492d1fd37df52a01))
+* **core:** drop support for TypeScript 4.0 and 4.1 ([#41158](https://github.com/angular/angular/issues/41158)) ([fa04894](https://github.com/angular/angular/commit/fa048948be75c30dafebda69efbeb81776460500))
+* **core:** support TypeScript 4.2 ([#41158](https://github.com/angular/angular/issues/41158)) ([59ef409](https://github.com/angular/angular/commit/59ef40988e94f3173134368bc7d4e2726cdd8455))
+* **ngcc:** support `__read` helper as used by TypeScript 4.2 ([#41201](https://github.com/angular/angular/issues/41201)) ([66e9970](https://github.com/angular/angular/commit/66e997069102a12c607d830c7edf91cb202e5902)), closes [microsoft/TypeScript#41523](https://github.com/microsoft/TypeScript/issues/41523)
+* **ngcc:** support `__spreadArray` helper as used by TypeScript 4.2 ([#41201](https://github.com/angular/angular/issues/41201)) ([7b1214e](https://github.com/angular/angular/commit/7b1214eca2dd2f09e723a46bed857fcb7d40bc0b)), closes [microsoft/TypeScript#41523](https://github.com/microsoft/TypeScript/issues/41523) [#40394](https://github.com/angular/angular/issues/40394)
+
+
+### Performance Improvements
+
+* **common:** remove unused methods from DomAdapter ([#41102](https://github.com/angular/angular/issues/41102)) ([3c66b10](https://github.com/angular/angular/commit/3c66b100dd6f05f53740f596c5eadb999c27c9c4))
+
+
+### BREAKING CHANGES
+
+* **core:** 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`.
+
+
+
 ## 11.2.6 (2021-03-17)
 
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-srcs",
-  "version": "12.0.0-next.4",
+  "version": "12.0.0-next.5",
   "private": true,
   "description": "Angular - a web framework for modern web apps",
   "homepage": "https://github.com/angular/angular",