5. [EXTRA] Custom addEventListener - rolling-scopes-school/RS-Short-Track GitHub Wiki

Folder Name	Branch	Coefficient
event-listener	event-listener	0.3

The task is to create a custom analog for addEventListener/removeEventListener

• Support for multiply events
• Support for param 'once'
• Use of native addEventListener/removeEventListener is stricktly forbidden

Examples

addEventListener(eventTarget, eventName, eventHandler, options /* { once: Boolean } */);
removeEventListener(eventTarget, eventName, eventHandler)