Universal Event Litener with testability built in
npm install event-listener-service





!TypeScript
!Typings
Install with npm:
``bash`
$ npm install event-listener-service

Declare usage without internal event registering implementation
Set internal event registering implementation
Add EventListener
Emit event using built in event emiting
Remove EventListener
`javascript
import EventListenerService from 'event-listener-service';
// Declare usage without internal event registering implementation
EventListenerService.useWithoutImplementation();
function onSomeEvent(event) {
console.log('some-event', event);
}
// Adding EventLisner
EventListenerService.addListener('some-event', onSomeEvent);
// Emiting Events
EventListenerService.emit('some-event', { rand: 9 });
// Removing EventLisnter
EventListenerService.removeListener('some-event', onSomeEvent);
`
`javascript
import EventListenerService from 'event-listener-service';
// Seting internal event registering implementation
EventListenerService.setImplementation({
addListener: window.addEventListener.bind(window),
removeListener: window.removeEventListener.bind(window)
});
function onResize() {
/ ... /
}
// Adding EventLisner
EventListenerService.addListener('resize', onResize, false);
// Removing EventLisnter
EventListenerService.removeListener('resize', onResize, false);
// Optionaly you can manually trigger event listeners in your tests or when you need to fully simulate event
EventListenerService.emit('resize', / [event object] /);
`
`javascript
// Set internal implementation for registering event listeners
EventListenerService.setImplementation({
addListener: / (eventName: string, listener: (event?: any) => void, ...additional: any[]) => void /
removeListener: / (eventName: string, listener: (event?: any) => void, ...additional: any[]) => void /
});
// And than use addListener and removeListner
EventListnerService.addListener(eventName: string, listener: (event?: any) => void, ...additional: any[]);
EventListnerService.removeListener(eventName: string, listener: (event?: any) => void, ...additional: any[]);
`
1. npm install
2. npm test
1. npm install
2. Make changes
3. If necessary add some tests to __tests__
4. npm test`
5. Make a Pull Request