---
source: https://iinventedlight.com/library/notes/angular-outputs.md
title: "Angular component outputs raise custom events to a parent"
license: CC-BY-4.0
license_url: https://creativecommons.org/licenses/by/4.0/
source_license: "CC BY 4.0 (Angular docs, footer-verified); MIT (angular/angular source); prose restates cited source lines in own words"
license_family: angular-docs-ccby
attribution: "Summary by iinventedlight (AI-assisted). Sources: Angular docs, CC BY 4.0 text (angular/angular adev footer); Angular source, MIT (angular/angular). Notices: Angular documentation (angular/angular adev): Copyright (c) 2010-2026 Google LLC; CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Angular source (angular/angular): Copyright (c) 2010-2026 Google LLC; MIT (https://raw.githubusercontent.com/angular/angular/main/LICENSE)."
author: "iinventedlight (synthesis of cited sources); text drafted with AI assistance"
date: 2026-11-11
status: published
approved_by: "Cole Withington, 2026-11-11 09:59 PT, Librarian chat widget t34s5: \"Yes, publish all 25 Angular and Vite drafts\""
checked_on: 2026-11-11
as_of: 2026-11-11
confidence: medium
untested: "No project was run for this note; only the fetched documentation and source files were read."
category: coding-references
topic_area: "code-web: Angular outputs"
tags: [angular, outputs, events, components]
client: Librarian
sources:
  - id: S1
    title: "Component outputs"
    publisher: Angular docs
    url: https://angular.dev/guide/components/outputs
    accessed: 2026-11-11
    license: "CC BY 4.0"
  - id: S2
    title: "output() function"
    publisher: Angular source
    url: https://github.com/angular/angular/blob/main/packages/core/src/authoring/output/output.ts
    accessed: 2026-11-11
    license: "MIT"
---
# Component outputs raise custom events to a parent

**Answer:** Angular components can define custom events by assigning a property to the `output` function. The function returns an `OutputEmitterRef`. You emit an event by calling `emit` on that ref. Outputs are like native browser events such as `click`, except Angular custom events do not bubble up the DOM.

## Rules

Output names are case-sensitive. When you extend a component class, the child class inherits the outputs. The `output` function has special meaning to the Angular compiler. You can call it only in component and directive property initializers.

You can pass event data to `emit`. In a template listener, that data is available as `$event`. When creating a component dynamically, you can programmatically subscribe to output events. The OutputRef type includes a subscribe method.

## In source

`output` declares Angular outputs in directives and components. Parents can subscribe through a template event binding, such as `(myOutput)="doSomething($event)"`, or through `OutputRef#subscribe`. You emit values with the `emit` method on `OutputEmitterRef`.

## See also

- [angular-inputs](https://iinventedlight.com/library/notes/angular-inputs/)
- [angular-components](https://iinventedlight.com/library/notes/angular-components/)

## Claims

- id: C1
  claim: The output function returns an OutputEmitterRef.
  source: S1
  evidence: "The `output` function returns an `OutputEmitterRef`."

- id: C2
  claim: Angular custom events do not bubble up the DOM.
  source: S1
  evidence: "**Angular custom events do not bubble up the DOM**."

- id: C3
  claim: output declares outputs in directives and components.
  source: S2
  evidence: "The `output` function allows declaration of Angular outputs in"

- id: C4
  claim: Emit values with emit on OutputEmitterRef.
  source: S2
  evidence: "the `emit` method from `OutputEmitterRef`."

## Sources

- [S1] Component outputs. Angular docs. https://angular.dev/guide/components/outputs . License: CC BY 4.0. Accessed 2026-11-11.

- [S2] output() function. Angular source. https://github.com/angular/angular/blob/main/packages/core/src/authoring/output/output.ts . License: MIT. Accessed 2026-11-11.


License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted). Sources and notices: Angular documentation (angular/angular adev): Copyright (c) 2010-2026 Google LLC; CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Angular source (angular/angular): Copyright (c) 2010-2026 Google LLC; MIT (https://raw.githubusercontent.com/angular/angular/main/LICENSE). Text was condensed and changed from the originals.

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