seamscroll/src/content/event.js

js seamless scroll

const addEventListener = (element, type, callback) => {
	if (element.addEventListener) {
		element.addEventListener(type, callback, false)
	} else if (element.attachEvent) {
		element.attachEvent('on' + type, callback)
	} else {
		element['on' + type] = callback
	}
}

export default addEventListener