Detect Browser version (Yandex.Browser support)

detectbrowser.coffee

navigator.checkBrowser = ->
	ua = navigator.userAgent
	M = ua.match(/(opera|yabrowser|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i)
	if /trident/i.test(M[1])
		tem = /\brv[ :]+(\d+)/g.exec(ua) or []
		return name: 'ie', version: (tem[1] or '')
	if M[1] is 'Chrome'
		if (tem = ua.match(/\bOPR\/(\d+)/))?
			return name: 'opera', version: tem[1]
		if (tem = ua.match(/\bYaBrowser\/(\d+)/))?
			return name: 'yabrowser', version: tem[1]
	M = if M[2] then [M[1], M[2]] else [navigator.appName, navigator.appVersion, '-?']
	if (tem = ua.match(/version\/(\d+)/i))?
		M.splice(1, 1, tem[1])

	name: M[0].toLowerCase()
	version: M[1]