Jon Staab
37 lines
891 B
Markdown
37 lines
891 B
Markdown
# Event Emitter
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The `Emitter` class extends Node.js EventEmitter to automatically emit all events to `'*'` listeners in addition to specific event listeners.
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## API
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```typescript
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// Extended EventEmitter that also emits all events to '*' listeners
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export declare class Emitter extends EventEmitter {
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// Emits an event to listeners and to '*' listeners
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emit(type: string, ...args: any[]): boolean;
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}
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```
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## Example
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```typescript
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import { Emitter } from '@welshman/lib';
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const emitter = new Emitter();
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// Listen for specific events
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emitter.on('message', (data) => {
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console.log('Message:', data);
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});
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// Listen for all events with '*'
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emitter.on('*', (eventType, ...args) => {
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console.log('Event:', eventType, args);
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});
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// Emit an event - triggers both listeners
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emitter.emit('message', 'Hello world');
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// Output:
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// Message: Hello world
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// Event: message ['Hello world']
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``` |