H5代码唤起小程序对应页面-JZTXT

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
    <title>判断手机是否安装微信</title>
</head>

<body>

    <!--<a href="javascript:testApp('weixin://dl/business/?t=Q7YHRPNermq')" class="dl-btn" id="download">打开微信</a>-->
    <script>
    window.onload = function () {
        var url = 'weixin://dl/business/?t=Q7YHRPNermq'
        var timeout, t = 1000, hasApp = true;
            setTimeout(function () {
                if (!hasApp) {
                    //没有安装微信
                    var r = confirm("您没有安装微信，请先安装微信!");
                    if (r == true) {
                        location.href = "http://weixin.qq.com/"
                    }
                } else {
                    //安装微信
                }
                document.body.removeChild(ifr);
            }, 2000)

            var t1 = Date.now();
            var ifr = document.createElement("iframe");
            ifr.setAttribute('src', url);
            ifr.setAttribute('style', 'display:none');
            document.body.appendChild(ifr);
            timeout = setTimeout(function () {
                var t2 = Date.now();
                if (!t1 || t2 - t1 < t + 100) {
                    hasApp = false;
                }
            }, t);
        
    };
    </script>
</body>

</html>