add-evt-listener

add-evt-listener

• Install: yarn add add-evt-listener.
• Exported functions:

import {addEvtListener, addEvtListenerOnce, addEvtListenerSelf, addEvtListenerSelfOnce} from 'add-evt-listener'

API

• Parameter: target, name (event name), handler, option.
• Specs: call target.addEventListener(name, handler, option).
• Return: a callback function that takes zero argument, used to remove the event listener via target.removeEventListener.

target.removeEventListener is called at most once regardless of how many times the returned callback is called.

Variant

• Once: remove the event listener after the first call.
• Self: only trigger the event listener when evt.currentTarget === evt.target (evt is the first parameter in handler).