mui app 頁面加載提示

MYAPP.showMask = function (text) {
    var info = "請稍候...";
    if ((text != "") && (text != undefined) && (text != null)) {
        info = text;
    }
    var mask = document.querySelector(".popup-mask-class");
    if (mask == null) {
        var div = document.createElement("div");
        div.className = "popup-mask-class";
        //    div.innerHTML = '<div class="popup-box-class"><i class="popup-spinner-ex"></i><p>' + info + '</p></div>';
        div.innerHTML = '<div class="popup-box-class"><div class="popup-spinner-ex"></div><p>' + info + '</p></div>';
        document.body.appendChild(div)
    }
    else {
        var p = mask.querySelector("p");
        p.innerHTML = info;
    }
}

MYAPP.hideMask = function () {
    var mask = document.querySelector(".popup-mask-class");
    if (mask != null) {
        document.body.removeChild(mask);
    }

}