export const inBrowser = typeof window !== 'undefined'

export const inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform

export const weexPlatform = inWeex && WXEnvironment.platform.toLowerCase()

export const UA = inBrowser && window.navigator.userAgent.toLowerCase()

export const isIE = UA && /msie|trident/.test(UA)

export const isIE9 = UA && UA.indexOf('msie 9.0') > 0

export const isEdge = UA && UA.indexOf('edge/') > 0

export const isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android')

export const isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios')

export const isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge