export function getInternetExplorerVersion () {
	const ua = window.navigator.userAgent

	const msie = ua.indexOf('MSIE ')
	if (msie > 0) {
		// IE 10 or older => return version number
		return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10)
	}

	const trident = ua.indexOf('Trident/')
	if (trident > 0) {
		// IE 11 => return version number
		const rv = ua.indexOf('rv:')
		return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10)
	}

	const edge = ua.indexOf('Edge/')
	if (edge > 0) {
		// Edge (IE 12+) => return version number
		return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10)
	}

	// other browser
	return -1
}
