js判断手机跳转代码

function isMobile() {
    var userAgentInfo = navigator.userAgent;
    var mobileAgents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
    var isMobileDevice = false;
    for (var i = 0; i < mobileAgents.length; i++) {
        if (userAgentInfo.indexOf(mobileAgents[i]) > -1) {
            isMobileDevice = true;
            break;
        }
    }
    return isMobileDevice;
}

if (isMobile()) {
    window.location.href = "http://m.example.com"; // 移动端页面地址
} else {
    window.location.href = "http://www.example.com"; // PC端页面地址
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/mobile-detect/1.4.5/mobile-detect.min.js"></script>
<script>
    var md = new MobileDetect(window.navigator.userAgent);
    if (md.mobile()) {
        window.location.href = "http://m.example.com";
    } else {
        window.location.href = "http://www.example.com";
    }
</script>