function is_mobile(){
let reg = /(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i;
return Boolean(navigator.userAgent.match(reg))
}
原文：https://www.cnblogs.com/usebylgb/p/10893808.html