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docs: add error guide for NG05101 #69467

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26 changes: 26 additions & 0 deletions adev/src/content/reference/errors/NG05101.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
# No event manager plugin found for event

This error occurs when Angular tries to set up a listener for an event but none of the registered event manager plugins recognizes the event name.

## Debugging the error

The error message includes the unrecognized event name, which is usually enough to spot the problem. The most common cause is a typo in the event binding:

```html
<!-- 'keyup.ente' is not recognized -->
<input (keyup.ente)="onEnter()" />

<!-- Correct -->
<input (keyup.enter)="onEnter()" />
```

If the event name is intentional and belongs to a third-party plugin (for example, a Hammer.js gesture event), make sure the plugin is provided via the `EVENT_MANAGER_PLUGINS` token:

```typescript
import {ApplicationConfig} from '@angular/core';
import {EVENT_MANAGER_PLUGINS} from '@angular/platform-browser';

export const appConfig: ApplicationConfig = {
providers: [{provide: EVENT_MANAGER_PLUGINS, useClass: MyCustomPlugin, multi: true}],
};
```
2 changes: 1 addition & 1 deletion goldens/public-api/platform-browser/errors.api.md
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Expand Up @@ -13,7 +13,7 @@ export const enum RuntimeErrorCode {
// (undocumented)
HYDRATION_CONFLICTING_FEATURES = 5001,
// (undocumented)
NO_PLUGIN_FOR_EVENT = 5101,
NO_PLUGIN_FOR_EVENT = -5101,
// (undocumented)
ROOT_NODE_NOT_FOUND = -5104,
// (undocumented)
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2 changes: 1 addition & 1 deletion packages/platform-browser/src/errors.ts
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Expand Up @@ -16,7 +16,7 @@ export const enum RuntimeErrorCode {

// misc errors (5100-5200 range)
BROWSER_MODULE_ALREADY_LOADED = 5100,
NO_PLUGIN_FOR_EVENT = 5101,
NO_PLUGIN_FOR_EVENT = -5101,
UNSUPPORTED_EVENT_TARGET = 5102,
TESTABILITY_NOT_FOUND = 5103,
ROOT_NODE_NOT_FOUND = -5104,
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2 changes: 1 addition & 1 deletion packages/platform-browser/test/dom/events/event_manager_spec.ts
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Expand Up @@ -60,7 +60,7 @@ import type {} from 'zone.js';
const plugin = new FakeEventManagerPlugin(doc, ['dblclick']);
const manager = new EventManager([plugin], new FakeNgZone());
expect(() => manager.addEventListener(element, 'click', null!)).toThrowError(
'NG05101: No event manager plugin found for event click',
'NG05101: No event manager plugin found for event click. Find more at https://next.angular.dev/errors/NG05101',
);
});

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