Looking at other questions here they seem to report setInterval is disabled or slowed down when a tab is hidden. I am seeing a different problem - calls to setInterval appear to "stack" and then all get applied when the tab is shown.
In my case I have a slider which animates an image on the site homepage every few seconds. If I go to another tab for a minute or two then return, the slider goes crazy... all the animations fire one after another until it is caught up.
I tried adding code to stop the animation happening if another is already in progress, but it doesn't work... maybe the timer events get queued in some way that circumvents my test.
setInterval(function(){
if (!rotationQueued) {
rotationQueued = true;
rotate_slide('next');
}
}
So, I want the JS to pause when the tab is hidden - or to act as normal - anything but this!!
You could try something like this:
function runRotate() {
return window.setInterval(function(){
if (!rotationQueued) {
rotationQueued = true;
rotate_slide('next');
}
});
}
var run = runRotate();
window.addEventListener('focus', function() {
run = runRotate();
},false);
window.addEventListener('blur', function() {
window.clearInterval(run);
},false);
You would basically look to see if the browser window is focused or not and then run or disable the setInterval function depending on the event returned.
Related
Have a slider in website header that uses JavaScript and Jquery to change its tabs every 6 seconds or when the user clicks one of its tabs. I use it in my project in Webflow (a page builder) and the problem I face is that whenever slide changes, currently focused form window loses focus.
I'm no programmer even though I'm learning js now, but if after some investigation I think that the .w--current class is used both for slider and form focus in Webflow's master js file.
Here is my live project:
https://bauserwis-com-pl.webflow.io/
I found some solutions that use IntersectionObserver API to tell if the header is in viewport and stop the setInterval timer, but I struggle with integrating it with my code. Or perhaps is there a different solution? I don't mind slides changing in the background, I only want to stop the form from losing focus.
Thanks in advance.
var tabTimeout;
clearTimeout(tabTimeout);
tabLoop();
// Cycle through all tabs.
function tabLoop() {
tabTimeout = setTimeout(function() {
var $next = $('.tabs-menu').children('.w--current:first').next();
if($next.length) {
$next.click(); // user click resets timeout
} else {
$('.standard-tab:first').click();
}
}, 6000); // 6 second tab loop (change this)
}
// Reset loop if a tab is clicked
$('.standard-tab').click(function() {
clearTimeout(tabTimeout);
tabLoop();
});
});
I have a banner like this:
http://jsfiddle.net/ek658cmz/1/
it's using several intervals to make animation (i can't use jQuery or something like that, in this project), and everything is perfect, before i switch tab. If i switch tab and return back after some seconds my animation isn't working properly, it looks like several animations are trying to be ran at the same time. What is interesting, if i switchback instantly to the banner tab, everything is okay, but more time "out" - more glitches i get.
I've tried to clearInterval on window blur
window.addEventListener('blur', function () {
Banner.stopAnimation();
}, false);
like that, also tried to play with animation initiations
window.addEventListener('load', function () {
Banner.init();
}, false);
window.addEventListener('focus', function () {
Banner.init();
}, false);
there was also several atempts to reload page on blur with location.reload(), but no success.
What i noticed, when i blur window by just opening another window somewhere, animation is ended normally, and wont start, but when i switch to another time, my animation is like ticking slowly in background for each second
There is one nuance here also, this banner must be ran in iframe.
I found this article helpful for what I was needing to do, which was have a slideshow of sorts with a tab and tab_container using JavaScript. The code works great:
Automatic tab switch in javascript or jquery
However, what I want it to do is if you let the page run, it keeps rotating between the tabs. But if a tab is manually clicked on (example, they want to read the content on that tab) it stops the auto-rotation of the tabs for the duration of while they are on that webpage. If the page is refreshed, or they go back to the page, it starts the tab rotation again.
I'm not sure the Javascript code that I can add to the above example to make the auto-rotation stop.
Thanks in advance for the help!
You can use clearInterval to stop the setInterval function from running. setInterval returns an ID and you can pass that ID to clearInterval to stop it, e.g.
var intervalID = setInterval(function() {
....
clearInterval(intervalID);
So just make the code
var intervalID = setInterval(function() {
....
tabs.on('click', 'a', function(e) {
clearInterval(intervalID);
$(this).trigger('slides.swap');
e.preventDefault();
});
I'd also change the setInterval function from triggering a click to just straight-up triggering slides.swap, so that you know the difference between a triggered click and a user's click:
$('a:eq('+idx+')').trigger('slides.swap');
Here's the updated Fiddle from that question.
I have an add-to-bag button used throughout our site and we want a dynamic popup to appear to acknowledge what was just added, and then it goes away. I'm finding that if you click another add button, it has the previous dialog's timeout attached. To fix this so the next dialog has its own 10,000 setTimeout rather than whatever is left over from the last one I have come up with the following code (that doesn't do the trick).
$(document).ready(function ()
{
// Create object for future dialog box - so it's available to the close method
var addToBagDialogVar = $('<div id="addToBagDialogBox"></div>');
var autoCloseTimeout = 10000;
var dialogTimer;
$(".addToBagPU").click(function (e)
{
var result = "";
$.get(this.href, function (data) { SetData(addToBagDialogVar, data); });
return false;
});
// Start listening for the close link click
$(document).on("click", "#bagPUCloseLink", function (event)
{
event.preventDefault();
CloseDialog(addToBagDialogVar);
});
function SetData(addToBagDialogVar, data)
{
result = data;
var regex = data.match("{{(.*)}}");
var bagCount = regex[1];
addToBagDialogVar.html(result).dialog({
open: function ()
{
clearTimeout(dialogTimer);
$(".ui-dialog-titlebar-close").hide();
SetBagCount(bagCount),
dialogTimer = setTimeout(function () { CloseDialog(addToBagDialogVar); }, autoCloseTimeout);
},
show: { effect: "fadeIn", duration: 800 },
close: function () { clearTimeout(dialogTimer); },
width: 320
});
}
function CloseDialog(closeThisDialog)
{
closeThisDialog.dialog("close");
closeThisDialog.dialog("destroy").remove();
}
});
The dialog is loaded with dynamic content from an external .Net page with product data and has a close link inside that page, which is why the dialog is loaded into addToBagDialogVar so it's available to CloseDialog.
All of that works just fine. It's just the reset of the timer that doesn't appear to be happening. If I go down a page of products and add each one to my bag, the 3rd or 4th dialog is only up for a second or so because they have all been using the first dialogs setTimeout.
I've read and read and tried too many different ways to remember and now my brain is mush.
I propose an alternate explanation for the behavior you're observing. When you click the first "add to cart", a timer is started. As you go down the page clicking "add to cart", a new timer is started each time. There's no overlap, just a bunch of separate timers running normally (although incidentally, each new dialog box blows away the timer ID you've previously created; I'll come back to this).
When your first dialog's timer expires, the dialog closes itself via the HTML ID, meaning it closes itself with something like a jquery $('div#addToBagDialogBox').closeOrSomethingLikeThat(), that is, every dialog inside a div with an id of addToBagDialogBox. The first timer expiration is closing all of your dialogs, because they all use that same HTML ID. The other timers are running perfectly, but when they expire there's nothing left for them to do.
You can fix the early-close problem by assigning a unique HTML ID to each dialog you create. And you'll want to manage your timer IDs on a per-dialog basis as well, such that each dialog has its own timer ID.
Edit: Just for nerdy grins, think about the details of the scenario you described. Your first timer is running, counting down normally, and you start four other timers while the first dialog is still there. The ID of the fifth timer is in your variable dialogTimer. So when the first dialog's timer expires, the close processing occurs, and you call clearTimeout with the ID of the fifth dialog's timer. So your first dialog's timer expired, the dialog closed all the other dialogs, and the cleanup cancelled the fifth timer. There are three other timers still running, their IDs lost forever. They finally expire and their shutdown functions run, but they're totally without effect, their companion dialogs long gone. Sorry, bona fide nerd here.
I have written a Userscript for Facebook and it groups similar notifications together. Now, using just a static HTML page with old notifications I had, the script works 100%.
Here's the problem: the DIV that holds notifications by default, has no notifications in it until the user clicks on the Notification button. Facebook has an inline onclick event that displays the DIV (Notifications menu) and uses AJAX to grab the notifications. Since my userscript only runs on startup, it finds nothing there - it has no effect on the page. I tried using a .click() event but right when you click the Notifications button it runs my code. The thing is, Facebook is still running it's AJAX request for the notifications, meaning that there are still no notifications for my script to work with, making it have no effect.
I don't want to use a generic setTimeout because I don't want the user to have to see the notifications before and then suddenly see them after. Is there a way to monitor the DIV so once the notifications are added, it runs? Or that once Facebook finishes it's AJAX request, it will run my code?
You can setInterval() to monitor the div's innerHTML, once populated you can run.
Here's the problem: the DIV that holds notifications by default, has no notifications in it until the user clicks on the Notification button. Facebook has an inline onclick event that displays the DIV (Notifications menu) and uses AJAX to grab the notifications.
...
I don't want to use a generic setTimeout because I don't want the user to have to see the notifications before and then suddenly see them after. Is there a way to monitor the DIV so once the notifications are added, it runs?
Yes there is:
var notificationDiv = document.getElementById(...);
var lastTimeoutID = null;
var main = function(evt){
// evt.target is the inserted element
// if you expect more elements, then do the following:
lastTimeoutID = setTimeout(function(){
lastTimeoutID = null;
// uncomment below block if you only need to do the work once.
/*
notificationDiv.removeEventListener("DOMNodeInserted", main, false);
*/
// do your work here.
}, 500); // waiting 500ms for next element to be added, otherwise doing work.
if (lastTimeoutID) {
clearTimeout(lastTimeoutID);
lastTimeoutID = null;
}
};
notificationDiv.addEventListener("DOMNodeInserted", main, false);
All of the timeout code above might be removable depending on what it is you're userscript is doing.
Maybe you can add a setTimeout loop. Something like
setTimeout(function(){
/* check for divs */
if(/* divs are found */){
//apply code
}
else {
setTimeout(/* loop again */);
}
},1000);