Minimal, type friend event emitter to prevent using events without correct types

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Installation

npm install @pallad/micro-events

Usage

const events = new Events<{
	progress: [number]
}>();

// register listener on event
events.on('progress', (progress) => {
	console.log('progress', progress);
});

events.once('progress', (progress) => {
	console.log('progress once', progress);
});

events.emit('progress', 10);
events.emit('progress', 100);
// progress 10
// progress once 10
// progress 100

Registering listener

events.on('progress', (progress) => {
	console.log('progress', progress);
});

events.on('progress', () => {
	// consuming argument is not needed
});

Emitting event

events.emit('progress', 50); // notifies all registered `progress` listeners

Removing listener

const listener = () => {
	console.log('progress');
}
events.on('progress', listener);
events.off('progress', listener);

events.emit('progress', 100);

// No listeners called