diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,50 @@
+<a name="12.0.0-next.0"></a>
+# 12.0.0-next.0 (2021-02-10)
+
+
+### Bug Fixes
+
+* **bazel:** update build tooling for latest changes in rules_nodejs ([#40710](https://github.com/angular/angular/issues/40710)) ([696f7bc](https://github.com/angular/angular/commit/696f7bc))
+* **bazel:** update integration test to use rules_nodejs@3.1.0 ([#40710](https://github.com/angular/angular/issues/40710)) ([34de89a](https://github.com/angular/angular/commit/34de89a))
+* **bazel:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([2c90391](https://github.com/angular/angular/commit/2c90391))
+* **benchpress:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([e721a5d](https://github.com/angular/angular/commit/e721a5d))
+* **compiler:** support multiple `:host-context()` selectors ([#40494](https://github.com/angular/angular/issues/40494)) ([07b7af3](https://github.com/angular/angular/commit/07b7af3)), closes [#19199](https://github.com/angular/angular/issues/19199)
+* **compiler:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([f728490](https://github.com/angular/angular/commit/f728490))
+* **compiler-cli:** update ngcc integration tests for latest changes in rules_nodejs ([#40710](https://github.com/angular/angular/issues/40710)) ([d7f5755](https://github.com/angular/angular/commit/d7f5755))
+* **compiler-cli:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([b75d7cb](https://github.com/angular/angular/commit/b75d7cb))
+* **core:** make DefaultIterableDiffer keep the order of duplicates ([#23941](https://github.com/angular/angular/issues/23941)) ([a826926](https://github.com/angular/angular/commit/a826926)), closes [#23815](https://github.com/angular/angular/issues/23815)
+* **core:** NgZone coaleascing options should trigger onStable correctly ([#40540](https://github.com/angular/angular/issues/40540)) ([22f9e45](https://github.com/angular/angular/commit/22f9e45))
+* **elements:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([efd4149](https://github.com/angular/angular/commit/efd4149))
+* **http:** complete the request on timeout ([#39807](https://github.com/angular/angular/issues/39807)) ([61a0b6d](https://github.com/angular/angular/commit/61a0b6d)), closes [#26453](https://github.com/angular/angular/issues/26453)
+* **http:** emit error on XMLHttpRequest abort event ([#40767](https://github.com/angular/angular/issues/40767)) ([3897265](https://github.com/angular/angular/commit/3897265)), closes [#22324](https://github.com/angular/angular/issues/22324)
+* **localize:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([4b469c9](https://github.com/angular/angular/commit/4b469c9))
+* **platform-browser:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([7ecfd2d](https://github.com/angular/angular/commit/7ecfd2d))
+* **router:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([350dada](https://github.com/angular/angular/commit/350dada))
+* **service-worker:** update type castings for JSON.parse usage ([#40710](https://github.com/angular/angular/issues/40710)) ([4f7ff96](https://github.com/angular/angular/commit/4f7ff96))
+
+
+### Features
+
+* **common:** implement `appendAll()` method on `HttpParams` ([#20930](https://github.com/angular/angular/issues/20930)) ([575a2d1](https://github.com/angular/angular/commit/575a2d1)), closes [#20798](https://github.com/angular/angular/issues/20798)
+* **forms:** introduce min and max validators ([#39063](https://github.com/angular/angular/issues/39063)) ([8fb83ea](https://github.com/angular/angular/commit/8fb83ea)), closes [#16352](https://github.com/angular/angular/issues/16352)
+* **http:** expose a list of human-readable http status codes ([#23548](https://github.com/angular/angular/issues/23548)) ([6fe3a1d](https://github.com/angular/angular/commit/6fe3a1d)), closes [#23543](https://github.com/angular/angular/issues/23543)
+* **language-service:** add command for getting components for a template file ([#40655](https://github.com/angular/angular/issues/40655)) ([5cde4ad](https://github.com/angular/angular/commit/5cde4ad))
+* **language-service:** Add diagnostics to suggest turning on strict mode ([#40423](https://github.com/angular/angular/issues/40423)) ([ecae75f](https://github.com/angular/angular/commit/ecae75f))
+* **language-service:** Implement `getRenameInfo` ([#40439](https://github.com/angular/angular/issues/40439)) ([4e8198d](https://github.com/angular/angular/commit/4e8198d))
+* **language-service:** initial implementation for `findRenameLocations` ([#40140](https://github.com/angular/angular/issues/40140)) ([9a5ac47](https://github.com/angular/angular/commit/9a5ac47))
+* **language-service:** view template typecheck block ([#39974](https://github.com/angular/angular/issues/39974)) ([d482f5c](https://github.com/angular/angular/commit/d482f5c))
+
+
+### BREAKING CHANGES
+
+* **forms:** Previously `min` and `max` attributes defined on the `<input type="number">`
+were ignored by Forms module. Now presence of these attributes would
+trigger min/max validation logic (in case `formControl`, `formControlName`
+or `ngModel` directives are also present on a given input) and
+corresponding form control status would reflect that.
+
+
+
 <a name="11.2.0"></a>
 # 11.2.0 (2021-02-10)