JS判别设备类型
通过UserAgent匹配关键词识别出移动设备
if (navigator.userAgent.match(/android|iphone|ipad|ipod|blackberry|meego|symbianos|windowsphone|ucbrowser/i)) {
window.location.href = 'https://www.baidu.com'
} else {
window.location.href = 'https://www.google.com'
}