h5唤起APP并检查是否成功

// 检查app是否打开
function checkOpen(cb) {
    const clickTime = +(new Date());
    function check(elsTime) {
        if (elsTime > 3000 || document.hidden || document.webkitHidden) {
            cb(true);
        } else {
            cb(false);
        }
    }
    // 启动间隔20ms运行的定时器，并检测累计消耗时间是否超过3000ms，超过则结束
    let count = 0;
    let intHandle = null;
    intHandle = setInterval(() => {
        count++;
        const elsTime = +(new Date()) - clickTime;
        if (count >= 100 || elsTime > 3000) {
            clearInterval(intHandle);
            check(elsTime);
        }
    }, 20);
}
/**
 * 唤起app
 * @param {any} uri  app schema
 * @param {any} fallback  唤起失败回调
 */
function openApp(uri, fallback) {
    const ifr = document.createElement('iframe');
    ifr.src = uri;
    ifr.style.display = 'none';
    if (fallback) {
        checkOpen((opened) => {
            if (!opened) {
                fallback();
            }
        });
    }
    document.body.appendChild(ifr);
    setTimeout(() => {
        document.body.removeChild(ifr);
    }, 2000);
}