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jquery document scroll not firing

I have a fixed navbar on my site that I'm trying to tie functions to once it reaches a certain point on the page. I've done this successfully three times before on three sites but can't for the life of me get it to work on this one. The function is wrapped in a window ready so I know the page is fully loaded -- completely stumped for two days... Here the code:
jQuery:
function startchange() {
$('#ajax-frame').imagesLoaded().done(function(instance) {
var scroll_start = 0;
var startchange = $('.startchange');
var offset = startchange.offset();
if (startchange.length) {
$(document).on( 'scroll', function() {
scroll_start = $(this).scrollTop();
if (scroll_start > offset.top) {
$('nav').addClass('active');
console.log("startchange working");
} else {
$('nav').removeClass('active');
};
});
}
});
};
CSS:
body,
html {
height: 100% !important;
width: 100%;
margin: 0;
padding: 0;
overflow-x: hidden;
}
Thanks for any insight into this frustrating issue.

One quick approach that will sove the issue is to remove: overflow-x: hidden; from your css. Demo: https://jsfiddle.net/mrlew/ce8me3qk/
But here is what's happening: you're setting body and html to height 100%, and one is overlapping the other (html tag is a block element too). You're setting both to height: 100% and actually what you're scrolling is body, and not window/document.
Proof: look at both scrollbar there when setting overflow to scroll: https://jsfiddle.net/mrlew/ce8me3qk/8/ Note that you're scrolling the inner one. So, if you change $("document").on('scroll', function() { to $("body").on('scroll', function() {, it will work too.
Or, just don't set html height to 100%.

Forcing a layer repaint

I have a kiosk application running on Ubuntu server 14.04.3 and chrome. Currently I have some code which hides the mouse if there was no movement for 2 seconds and once the user attempts to move the mouse again it shows up again. The trick is by using a cursor:none and adding an overlay:
js:
var body = $('body');
function hideMouse() {
body.addClass("hideMouse");
body.on('mousemove', function(){
if(window.hiding) return true;
window.hiding = true;
body.removeClass("hideMouse");
$('div.mouseHider').remove();
clearTimeout(window.hideMouse);
window.hideMouse = setTimeout(function(){
body.addClass("hideMouse");
$('<div class="mouseHider"></div>').css({
position: 'fixed',
top: 0,
left: 0,
height: '100%',
width: '100%',
zIndex: 99999
}).appendTo(body);
redraw(document.body);
setTimeout(function(){
window.hiding = false;
}, 100);
}, 4000);
});
}
function redraw(e) {
e.style.display = 'none';
e.offsetHeight;
e.style.display = 'block';
}
css:
body.hideMouse *, body.hideMouse{
cursor: none;
}
body.hideMouse *{
pointer-events: none !important;
}
This code works perfectly fine but there is only 1 caveat. When the page first loading it attempts to hide the mouse with the same trick but the mouse is still sticking there since it just didn't repainted the layer I guess. If I want it to work, I have to move the mouse a little bit and from then on it will work as expected and hide the mouse. The thing is that the kiosk application is restarting every day which means I boot the X display again and the mouse is being reset to the middle of the screen and it just sticks there until I move it a little bit. I hope you understand what I mean.
Do you guys have any idea how I can fix this?

You don't need all that code to do what you want. You could do:
Create a setTimeout to hide the cursor after 2s as soon as the page is loaded
When someone moves the mouse, you:
2.1. Show the cursor again
2.2. Clear the current setTimeout
2.3. And create the setTimeout to hide the cursor after 2s again.
The code below should work for you:
document.addEventListener('DOMContentLoaded', function() {
var cursorNone = document.getElementById('cursor-none');
var t = setTimeout(hideMouse, 2000);
document.addEventListener('mousemove', function(e) {
showMouse();
clearTimeout(t);
t = setTimeout(hideMouse, 2000);
});
function hideMouse() {
cursorNone.classList.remove('hidden');
}
function showMouse() {
cursorNone.classList.add('hidden');
}
});
#cursor-none {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 9999;
cursor: none;
background-color: transparent;
}
.hidden {
display: none;
}
<body>
<div id="cursor-none" class="hidden"></div>
</body>

Jquery - How to disable the entire page

I have this ajax event
function save_response_with_ajax(t){
var form = $('#edit_'+t);
var div = $('#loading_'+t);
$.ajax({
url: form.attr("action"),
type: "POST",
data: form.serialize(),
cache: false,
beforeSend: function(){
form.hide();
div.show();
},
complete: function(){
div.hide();
form.show();
},
success: function (result) {
}
});
}
And everything works fine, but I want to add (if it's possible) the hability of turning the entire page (the content/body) into gray while before/complete ajax events, like if it were a modal (like this http://jqueryui.com/demos/dialog/#modal but without the dialog)
Is there a way of doing this?
Thanks in advance
Javier Q.

A way of doing this is having an overlay element which fills the entire page. If the overlay element has a semi-transparent background color, it grays out the page completely: http://jsfiddle.net/SQdP8/1/.
Give it a high z-index so that it's on top of all other elements. That way, it renders correctly, and it catches all events (and won't pass them through).
#overlay {
background-color: rgba(0, 0, 0, 0.8);
z-index: 999;
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
display: none;
}​

you can try
$("body").append('<div id="overlay" style="background-color:grey;position:absolute;top:0;left:0;height:100%;width:100%;z-index:999"></div>');
then just use
$("#overlay").remove();
to get rid of it.
quick & dirty.

Try appending an overlay during the "beforeSend" function:
$("body").prepend("<div class=\"overlay\"></div>");
$(".overlay").css({
"position": "absolute",
"width": $(document).width(),
"height": $(document).height(),
"z-index": 99999,
}).fadeTo(0, 0.8);

This is the complete solution which I am using:
Following are the sections:
CSS for overlay. "fixed" is used to cover whole page content, not just screen height and widths. You can use background color or gif
Attaches to "beforeSend" event of jQuery Ajax call. Creates the overlay on demand and shows it.
Upon completion of request, it removes the overlay from DOM
CSS:
.request-overlay {
z-index: 9999;
position: fixed; /*Important to cover the screen in case of scolling content*/
left: 0;
top: 0;
width: 100%;
height: 100%;
display: block;
text-align: center;
background: rgba(200,200,200,0.5) url('../../Images/submit-ajax-loader.gif') no-repeat center; /*.gif file or just div with message etc. however you like*/
}
JavaScript:
$.ajax({
url: '/*your url*/',
beforeSend: function () {
$('body').append('<div id="requestOverlay" class="request-overlay"></div>'); /*Create overlay on demand*/
$("#requestOverlay").show();/*Show overlay*/
},
success: function (data) {
/*actions on success*/
},
error: function (jqXhr, textStatus, errorThrown) {
/*actions on error*/
complete: function () {
$("#requestOverlay").remove();/*Remove overlay*/
}
});

Use jQuery ajaxStart() to append a Div to your document. Set it to the size of your document with some form of semi-transparent document. Then remove it on ajaxStop().

var modal = $('<div>')
.dialog({ modal: true });
modal.dialog('widget').hide();
setTimeout(function() { modal.dialog('close'); }, 2000); // to close it
here is a demo: http://jsbin.com/avoyut/3/edit#javascript,html,live
don't forget to call modal.dialog('close'); to end it all!
this way you get the benefits of the actual dialog modal code, resizing, disabling, etc..
hope this helps -ck

You may want to give the user some indication that something is happening, too, not just a blank/gray screen. I would suggest some sort of loading gif, see this, for example.

Today I was looking for a solution which would work for all browsers of IE. I took the code of #pimvdb and #Ash Clarke along with his comment where he mentioned background-color: black; opacity: 0.8; may also work. For IE it will just be completely black. and came to a solution below:
$("#first-div").prepend("<div class=\"overlay-example\"></div>");
var height1 = $("#first-div").height();
var width1 = $("#first-div").width();
$(".overlay-example").css({
"background-color": "black",
"z-index": "9999999",
"position": "absolute",
"width": width1,
"height": height1,
"display": "none"
}).fadeTo(0, 0.0001);
Tested in IE8, IE9 above. Could not check for IE7. Will be glad to update my soulution in case you find it wrong. (it would help me also to update my solution :))
Thank you #pimvdb and #Ash Clarke
Demo

Detect users position on web page

Let's say I have a single HTML page. 2000 pixels long for example. I want to detect if a visitor reaches a certain point on the page.
The page structure:
0px = begin of the page;
500px = about us page;
1000px = contactpage;
Is there a way with jQuery to detect if a user reaches the points described above?

You probably want jQuery's scroll event-binding function.

Yes, I would create three divs and then have a mouse over event on each. Example:
$("#begin").mouseover(function(){
alert("over begin");
});
$("#about").mouseover(function(){
alert("over about");
});
$("#contact").mouseover(function(){
alert("over contact");
});
You can see a working fiddle here: http://jsfiddle.net/ezj9F/

Try THIS working snippet.
Using this code you don't have to know position of the element you want to check if it is visible.
JQuery
var $window = $(window);
// # of pixels from the top of the document to the top of div.content
var contentTop = $("div.content").offset().top;
// content is visible when it is on the bottom of the window and not at the top
var contentStart = contentTop - $window.height();
// content is still visible if any part of his height is visible
var contentEnd = contentTop + $("div.content").height();
$window.scroll(function() {
var scrollTop = $window.scrollTop();
if(scrollTop > contentStart && scrollTop < contentEnd) {
console.log('You can see "HELLO"!');
} else {
console.log('You cannot see "HELLO"!');
}
});
HTML
<div class="scroll"></div>
<div class="content">HELLO</div>
<div class="scroll"></div>
CSS
div.scroll {
background-color: #eee;
width: 100px;
height: 1000px;
}
div.content {
background-color: #bada55;
width: 100px;
height: 200px;
}
EDIT: Now the algorithm is checking if any part of the div.content is visible (it is considering height of the element). If you are not interested in that change contentEnd to var contentEnd = contentTop.

jQuery Popup Bubble/Tooltip [closed]

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Improve this question
I'm trying to make a "bubble" that can popup when the onmouseover event is fired and will stay open as long as the mouse is over the item that threw the onmouseover event OR if the mouse is moved into the bubble. My bubble will need to have all manners of HTML and styling including hyperlinks, images, etc.
I've basically accomplished this by writing about 200 lines of ugly JavaScript but I would really like to find a jQuery plugin or some other way to clean this up a bit.

Qtip is the best one I've seen. It's MIT licensed, beautiful, has all the configuration you need.
My favorite lightweight option is tipsy. Also MIT licensed. It inspired Bootstrap's tooltip plugin.

This can be done easily with the mouseover event as well. I've done it and it doesn't take 200 lines at all. Start with triggering the event, then use a function that will create the tooltip.
$('span.clickme').mouseover(function(event) {
createTooltip(event);
}).mouseout(function(){
// create a hidefunction on the callback if you want
//hideTooltip();
});
function createTooltip(event){
$('<div class="tooltip">test</div>').appendTo('body');
positionTooltip(event);
};
Then you create a function that position the tooltip with the offset position of the DOM-element that triggered the mouseover event, this is doable with css.
function positionTooltip(event){
var tPosX = event.pageX - 10;
var tPosY = event.pageY - 100;
$('div.tooltip').css({'position': 'absolute', 'top': tPosY, 'left': tPosX});
};

Although qTip (the accepted answer) is good, I started using it, and it lacked some features I needed.
I then stumbled upon PoshyTip - it is very flexible, and really easy to use. (And I could do what I needed)

Ok, after some work I'm able to get a "bubble" to pop up and go away at all the right times. There is a LOT of styling that needs to happen still but this is basically the code i used.
<script type="text/javascript">
//--indicates the mouse is currently over a div
var onDiv = false;
//--indicates the mouse is currently over a link
var onLink = false;
//--indicates that the bubble currently exists
var bubbleExists = false;
//--this is the ID of the timeout that will close the window if the user mouseouts the link
var timeoutID;
function addBubbleMouseovers(mouseoverClass) {
$("."+mouseoverClass).mouseover(function(event) {
if (onDiv || onLink) {
return false;
}
onLink = true;
showBubble.call(this, event);
});
$("." + mouseoverClass).mouseout(function() {
onLink = false;
timeoutID = setTimeout(hideBubble, 150);
});
}
function hideBubble() {
clearTimeout(timeoutID);
//--if the mouse isn't on the div then hide the bubble
if (bubbleExists && !onDiv) {
$("#bubbleID").remove();
bubbleExists = false;
}
}
function showBubble(event) {
if (bubbleExists) {
hideBubble();
}
var tPosX = event.pageX + 15;
var tPosY = event.pageY - 60;
$('<div ID="bubbleID" style="top:' + tPosY + '; left:' + tPosX + '; position: absolute; display: inline; border: 2px; width: 200px; height: 150px; background-color: Red;">TESTING!!!!!!!!!!!!</div>').mouseover(keepBubbleOpen).mouseout(letBubbleClose).appendTo('body');
bubbleExists = true;
}
function keepBubbleOpen() {
onDiv = true;
}
function letBubbleClose() {
onDiv = false;
hideBubble();
}
//--TESTING!!!!!
$("document").ready(function() {
addBubbleMouseovers("temp1");
});
</script>
Here is a snippet of the html that goes with it:
Mouseover this for a terribly ugly red bubble!

I have programmed an useful jQuery Plugin to create easily smart bubble popups with only a line of code in jQuery!
What You can do:
- attach popups to any DOM element!
- mouseover/mouseout events automatically managed!
- set custom popups events!
- create smart shadowed popups! (in IE too!)
- choose popup’s style templates at runtime!
- insert HTML messages inside popups!
- set many options as: distances, velocity, delays, colors…
Popup’s shadows and colorized templates are fully supported by
Internet Explorer 6+, Firefox, Opera 9+, Safari
You can download sources from
http://plugins.jquery.com/project/jqBubblePopup

QTip has bug with jQuery 1.4.2. I had to switch to jQuery Bubble Pop up http://www.vegabit.com/jquery_bubble_popup_v2/#examples and it works great!

Sounds to me you dn't want the mouse over events: you want the jQuery hover() event.
And what you seem to want is a "rich" tooltip, in which case I suggest jQuery tooltip. With the bodyHandler option you can put arbitrary HTML in.

I'm trying to make a "bubble" that can
popup when the onmouseover event is
fired and will stay open as long as
the mouse is over the item that threw
the onmouseover event OR if the mouse
is moved into the bubble. My bubble
will need to have all manners of html
and styling including hyperlinks,
images, etc.
All those events fully managed by this plugin...
http://plugins.jquery.com/project/jqBubblePopup

ColorTip is the most beautiful i've ever seen

The new version 3.0 of the jQuery Bubble Popup plugin supports jQuery v.1.7.2, currently the latest and stable version of the most famous javascript library.
The most interesting feature of the 3.0 version is that You can use together jQuery & Bubble Popup plugin with any other libraries and javascript frameworks like Script.aculo.us, Mootols or Prototype because the plugin is completely encapsulated to prevent incompatibility problems;
jQuery Bubble Popup was tested and supports a lot of known and “unknown” browsers; see the documentation for the complete list.
Like previous versions, jQuery Bubble Popup plugin continues to be released under the MIT license; You are free to use jQuery Bubble Popup in commercial or personal projects as long as the copyright header is left intact.
download the latest version or visit live demos and tutorials at
http://www.maxvergelli.com/jquery-bubble-popup/

Autoresize simple Popup Bubble
index.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link href="bubble.css" type="text/css" rel="stylesheet" />
<script language="javascript" type="text/javascript" src="jquery.js"></script>
<script language="javascript" type="text/javascript" src="bubble.js"></script>
</head>
<body>
<br/><br/>
<div class="bubbleInfo">
<div class="bubble" title="Text 1">Set cursor</div>
</div>
<br/><br/><br/><br/>
<div class="bubbleInfo">
<div class="bubble" title="Text 2">Set cursor</div>
</div>
</body>
</html>
bubble.js
$(function () {
var i = 0;
var z=1;
do{
title = $('.bubble:eq('+i+')').attr('title');
if(!title){
z=0;
} else {
$('.bubble:eq('+i+')').after('<table style="opacity: 0; top: -50px; left: -33px; display: none;" id="dpop" class="popup"><tbody><tr><td id="topleft" class="corner"></td><td class="top"></td><td id="topright" class="corner"></td></tr><tr><td class="left"></td><td>'+title+'</td><td class="right"></td></tr><tr><td class="corner" id="bottomleft"></td><td class="bottom"><img src="bubble/bubble-tail.png" height="25px" width="30px" /></td><td id="bottomright" class="corner"></td></tr></tbody></table>');
$('.bubble:eq('+i+')').removeAttr('title');
}
i++;
}while(z>0)
$('.bubbleInfo').each(function () {
var distance = 10;
var time = 250;
var hideDelay = 500;
var hideDelayTimer = null;
var beingShown = false;
var shown = false;
var trigger = $('.bubble', this);
var info = $('.popup', this).css('opacity', 0);
$([trigger.get(0), info.get(0)]).mouseover(function () {
if (hideDelayTimer) clearTimeout(hideDelayTimer);
if (beingShown || shown) {
// don't trigger the animation again
return;
} else {
// reset position of info box
beingShown = true;
info.css({
top: -40,
left: 10,
display: 'block'
}).animate({
top: '-=' + distance + 'px',
opacity: 1
}, time, 'swing', function() {
beingShown = false;
shown = true;
});
}
return false;
}).mouseout(function () {
if (hideDelayTimer) clearTimeout(hideDelayTimer);
hideDelayTimer = setTimeout(function () {
hideDelayTimer = null;
info.animate({
top: '-=' + distance + 'px',
opacity: 0
}, time, 'swing', function () {
shown = false;
info.css('display', 'none');
});
}, hideDelay);
return false;
});
});
});
bubble.css
/* Booble */
.bubbleInfo {
position: relative;
width: 500px;
}
.bubble {
}
.popup {
position: absolute;
display: none;
z-index: 50;
border-collapse: collapse;
font-size: .8em;
}
.popup td.corner {
height: 13px;
width: 15px;
}
.popup td#topleft {
background-image: url(bubble/bubble-1.png);
}
.popup td.top {
background-image: url(bubble/bubble-2.png);
}
.popup td#topright {
background-image: url(bubble/bubble-3.png);
}
.popup td.left {
background-image: url(bubble/bubble-4.png);
}
.popup td.right {
background-image: url(bubble/bubble-5.png);
}
.popup td#bottomleft {
background-image: url(bubble/bubble-6.png);
}
.popup td.bottom {
background-image: url(bubble/bubble-7.png);
text-align: center;
}
.popup td.bottom img {
display: block;
margin: 0 auto;
}
.popup td#bottomright {
background-image: url(bubble/bubble-8.png);
}

Tiptip is also a nice library.

You can use qTip for this; However you'd have to code a little for launching it on mouseover event; And in case you want a default watermark on your text fields, you'd have to use the watermark plugin...
I realized that this leads to lot of repetitive code; So I wrote a plugin on top of qTip that makes it really easy to attach informational popup to form fields. You can check it out here: https://bitbucket.org/gautamtandon/jquery.attachinfo
Hope this helps.