javascript - jQuery mobile - close panel on history back

Question

I have a jQuery mobile panel which slides in from the side, it works great. But lets say you have a login page, that redirects to a main page with a panel. Now if the user opens the panel, and then clicks the back button, he expects the panel to close. But instead the browser navigates back to the login page.

I′ve tried adding something to the url:

window.location.hash = "panelOpen";

But that just messes up the jQuery mobile history state pattern. I′ve also tried to listen to the navigate event, and prevent it if a panel is open:

$(window).on('navigate', function (e, hans) {
     var panels = $('[data-role="panel"].ui-panel-open');
     if (panels&&panels.length>0) {
         e.preventDefault();
         e.stopPropagation();
         $('#' + panels[0].id).panel('close');
           return false;
         }
});

This kind of works, except that the url is changed, and I cannot grab the event that changes the url. Furthermore, it also messes up the jQuery mobile history pattern.

So how does people achieve this expected 'app-like' behaviour with a jQuery mobile panel; open panel > history back > close panel. And thats it.

Thanks alot!

Answer 1

Updated

Instead of retrieving current URL from jQuery Mobile's history, It is safer to retrieve it from hashchange event event.originalEvent.newURL and then pass it to popstate event to be replaceState() with that URL.

---

Instead of listening to navigate, listen to popstate which fires before. The trick here is manipulate both browser's history and jQuery Mobile's history by replaceState() and reload same page without transition.

var newUrl;
$(window).on("hashchange", function (e) {
    /* retrieve URL */
    newUrl = e.originalEvent.newURL;
}).on("popstate", function (e) {
    var direction = e.historyState.direction == "back" ? true : false,
        activePanel = $(".ui-panel-open").length > 0 ? true : false,
        url = newUrl,
        title = document.title;
    if (direction && activePanel) {
        $(".ui-panel-open").panel("close");
        $(".ui-header .ui-btn-active").removeClass("ui-btn-active");
        /* reload same page to maintain jQM's history */
        $.mobile.pageContainer.pagecontainer("change", url, {
            allowSamePageTransition: true
        });
        /* replace state to maintain browsers history */
        window.history.replaceState({}, title, url);
        /* prevent navigating into history */
        return false;
    }
});

This part is meant to maintain same transition used previously as transition is set to none when reloading same page.

$(document).on("pagebeforechange", function (e, data) {
    if (data.options && data.options.allowSamePageTransition) {
        data.options.transition = "none";
    } else {
        data.options.transition = $.mobile.defaultPageTransition;
    }
});

Demo - Code