docs: list IE 9 and 10 as deprecated (#36887)

Add documentation in the deprecations markdown file about the deprecation of IE 9 and 10.
Additionally, add note in browser support document about deprecation.

PR Close #36887
This commit is contained in:
Andrew Scott 2020-04-30 09:30:12 -07:00 committed by Alex Rickabaugh
parent 70b25a3d4f
commit 63455b839a
2 changed files with 13 additions and 1 deletions

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@ -53,7 +53,8 @@ Angular supports most recent browsers. This includes the following specific vers
IE
</td>
<td>
11, 10, 9 ("compatibility view" mode not supported)
<div> 11, 10*, 9* ("compatibility view" mode not supported) </div>
<div>*deprecated in v10, see the <a href="/guide/deprecations#ie-9-10">deprecations guide</a>.</div>
</td>
</tr>
<tr>

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@ -60,6 +60,7 @@ v9 - v12
| `@angular/core/testing` | [`TestBed.get`](#testing) | <!--v9--> v12 |
| `@angular/router` | [`ActivatedRoute` params and `queryParams` properties](#activatedroute-props) | unspecified |
| template syntax | [`/deep/`, `>>>`, and `::ng-deep`](#deep-component-style-selector) | <!--v7--> unspecified |
| browser support | [`IE 9 and 10`](#ie-9-10) | <!--v10--> v11 |
@ -562,7 +563,17 @@ In practical terms, the `package.json` of all `@angular` packages will change in
For more information about the npm package format, see the [Angular Package Format spec](https://goo.gl/jB3GVv).
{@a ie-9-10}
### IE 9 and 10 support
Support for IE 9 and 10 has been deprecated and will be removed in a future version.
Supporting outdated browsers like these increases bundle size, code complexity, and test load, and also requires time and effort that could be spent on improvements to the framework.
For example, fixing issues can be more difficult, as a straightforward fix for modern browsers could break old ones that have quirks due to not receiving updates from vendors.
The final decision was made on three key points:
* __Vendor support__: Microsoft dropped support of IE 9 and 10 on 1/12/16, meaning they no longer provide security updates or technical support.
* __Usage statistics__: We looked at usage trends for IE 9 and 10 from various sources and all indicated that usage percentages were extremely small (fractions of 1%).
* __Feedback from partners__: We also reached out to some of our Angular customers and none expressed concern about dropping IE 9 and 10 support.
{@a removed}
## Removed APIs