docs(core): showcase host listener support for specific keys in events

[macjohnny]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.io application / infrastructure changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

See this example: https://stackblitz.com/edit/angular-ivy-u23hez?file=src/app/app.component.ts

[macjohnny]

maybe we could add event more information about the keys supported. is there a pointer to the implementation?

[macjohnny]

moreover, some information could be added to https://angular.io/guide/binding-syntax and https://angular.io/guide/event-binding-concepts, since <input (keydown.enter)="someHandler()" /> works as well

[macjohnny]

for keyboard event keys see

angular/packages/platform-browser/src/dom/events/key_events.ts

Line 23 in 894fa75

// cf https://www.w3.org/TR/DOM-Level-3-Events-key/

for global target names see

angular/packages/core/src/render3/interfaces/renderer.ts

Line 31 in a03f80a

export type GlobalTargetName = 'document'|'window'|'body';

[AndrewKushnir]

@macjohnny thanks for improving Angular docs 👍

[jessicajaniuk]

This PR was merged into the repository by commit f0d572e.

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