通过js判断微信、QQ等内置浏览器并在外部浏览器打开(示例代码)

function is_neizhi() {
    var ua = navigator.userAgent.toLowerCase();
    if (ua.match(/MicroMessenger/i) == "micromessenger") {
        return "weixin";
    } else if (ua.match(/QQ/i) == "qq") {
        return "QQ";
    } else if (ua.match(/Alipay/i) == "alipay" && payway == 2) {
        return "alipay";
    }
    return false;
}