jQuery .on（“点击”）两次射击

Question

我有以下功能，但由于某种原因，它会触发两次。为什么会发生这种情况，如何修复它，因为此函数会增加全局计数器？

感谢您的所有帮助！

$("body").on("click", "#moveOn", function (e) {
    var currentLocation = $(".backgroundImage.currentLocation");
    $(currentLocation).removeClass("currentLocation").addClass("leaveLocation");

    var nextLocationClass = $(this).attr("data-nextLocation");
    var nextLocation = $(".backgroundImage." + nextLocationClass);
    $(nextLocation).removeClass("hidden").addClass("moveToLocation");

    console.log("Clicked arrow " + dataHolder.data.currLocation);
    (dataHolder.data.currLocation)++;

    $(this).addClass("hidden");

    setTimeout(function () {
        $(currentLocation).addClass("hidden").removeClass("leaveLocation");
        $(nextLocation).addClass("currentLocation").removeClass("moveToLocation");
    }, 6000);
    e.stopPropagation();
});