Develop Reference

Move Div not only while hovering but when another div reach the top

Can someone tell me why my code isn't working?
var distance = $('#introSection').offset().top,
$window = $(window);
$window.scroll(function() {
if ( $window.scrollTop() >= distance ) {
document.getElementById("hoveredLink").style.left = document.getElementById("introNav").target.offsetLeft + "px";
document.getElementById("hoveredLink").style.left = document.getElementById("introNav").target.offsetWidth + "px";
}
});
I want the "hoveredLink" element to scroll to the menu element "introNav" if the "introSection" reaches the very top of the window :( is not working yet though

Try using it this way it will work.
var distance = 10;
$('body').scroll(function() {
var scroll = $(this).scrollTop();
if ( scroll >= distance ) {
console.log("i am working!");
}
});

Draggable jQuery Restriction

I'm trying to scroll an image by dragging my cursor. I'm using the Draggable jQuery library but I'm having a problem.
I need to determine the limit of the image so that I can block the drag to avoid showing white space.
Anyone can help me with that?
jsfiddle
<div style="width:100%;height:100%;" id="parent">
<img src="http://cdn.wallpapersafari.com/10/37/Aim58J.jpg" id="draggable"/>
$( "#draggable" ).draggable({
axis: 'x,y',
cursor: "crosshair",
});

If you need scrolling by dragging, do not use dragging. Use simple mouse move instead. Look at the example below. In this case you can scroll any content inside your container.
Hope it would help.
UPDATED:
If you need dragging of some background element, you should to drag it by mousemove and calculate visible area according to container size.
So, in few words - Drag image left till its width minus left offset is bigger than container(window) width, and so on for right, top and down offsets.
// Main script
function run() {
var $image = $('#draggable');
var $window = $(window);
var isStarted = false;
var cursorInitialPosition = {left: 0, top: 0};
var imageInitialPosition = {left: 0, top: 0};
var imageSize = {width: $image.width(), height: $image.height()};
// stop dragging
var stop = function() {
isStarted = false;
$window.unbind('mousemove', update);
};
// update image position
var update = function(event) {
// size of container (window in our case)
var containerSize = {width: $window.width(), height: $window.height()};
var left = imageInitialPosition.left + (event.pageX - cursorInitialPosition.left);
var top = imageInitialPosition.top + (event.pageY - cursorInitialPosition.top);
// don't allow dragging too left or right
if (left <= 0 && imageSize.width + left >= containerSize.width) {
$image.css('left', left);
}
// don't allow dragging too top or down
if (top <= 0 && imageSize.height + top >= containerSize.height) {
$image.css('top', top);
}
};
$window.mousedown(function(event){
var position = $image.position();
cursorInitialPosition.left = event.pageX;
cursorInitialPosition.top = event.pageY;
imageInitialPosition.left = position.left;
imageInitialPosition.top = position.top;
$(window).mousemove(update);
});
$window.mouseout(stop);
$window.mouseup(stop);
}
$(function(){
// wait for image loading because we need it size
var image = new Image;
image.onload = run;
image.src = "http://cdn.wallpapersafari.com/10/37/Aim58J.jpg";
});
https://jsfiddle.net/2hxz49bj/5/

Fix div position between two heights

I have a div that I want to keep position: fixed when scrolling between two points.
For example, it should remain fixed only between the height of it's container div
I've done the following:
$window.scroll(function(e) {
pos = $('.container-element').height();
if ($window.scrollTop() > pos) {
$(scroll-element).css({
position: 'relative',
});
} else {
$(scroll-element).css({
position: 'fixed',
});
}
});
However, this doesn't stop the scroll-element from becoming relative on reaching the end of the container-element. What should I do to achieve the intended behavior?
EDIT:
JSFiddle: http://jsfiddle.net/09760d60/

I think You should remove fixed position when $(window).scrollTop() > containerHeight-childHeight
$(document).ready(function(){
$(window).scroll(function(e) {
containerHeight = $('.container-element').height();
childHeight = $(".scroll-element").height();
if ($(window).scrollTop() > containerHeight-childHeight) {
$('.scroll-element').removeClass('fixed');
} else {
$('.scroll-element').addClass('fixed');
}
});
});
Please check updated fiddle
http://jsfiddle.net/PrashantShirke/1u991v1j/

You should check the top and bottom bounds of your container, and compare it with the top and bottom bounds of your scroll element :
$(document).ready(function(){
$(window).scroll(function(e) {
containerTop = $('.container-element').offset().top;
containerBottom = $('.container-element').height()+$('.container-element').offset().top;
scrollEl = $('.scroll-element').height();
if ($(window).scrollTop() >= containerTop && $(window).scrollTop()+scrollEl <= containerBottom) {
$('.scroll-element').css({
"top":$(window).scrollTop()+"px"
});
}
});
});
Exemple
$(window).scrollTop() < containerTop: scroll element is at top of content
$(window).scrollTop()+scrollEl > containerBottom: bottom of scroll element is at bottom of content
If scroll element has to move, adjust its top property while being absolutelly positioned by CSS.

I think it would be more robust to check the bottoms of the container and window, not the heights of the container and child.
$(document).ready(function(){
var $window = $(window);
var $container = $('.container-element');
var $scroll = $('.scroll-element');
var containerBox = $container[0].getBoundingClientRect();
$window.scroll(function(e) {
var scrollBottom = $window.scrollTop() + $window.height();
var canSeeContainerBottom = scrollBottom > containerBox.bottom;
$scroll.css('position', canSeeContainerBottom ? 'relative' : 'fixed');
});
});
http://jsfiddle.net/bryandowning/09760d60/14/

Auto scrolling to element in scrollable div

I have 5 elements that are within a div larger than the screen (on a mobile phone).
I want the user to be able to click on one of the elements and have that element scroll to the centre of the screen.
I've tried writing this with jQuery myself, but I can't seem to get the logic quite right. I've got it kind of moving but the element selected doesn't go to the centre of the screen.
Here's a Fiddle of what I have do far: http://jsfiddle.net/geQ64/1/
Here's the JS from the fiddle also:
$(window).on('load', function() {
$('.tab-3').trigger('click');
var width = $(window).width();
if (width < 651) {
$('.ul-wrap').scrollLeft( $('.tab-3').offset().left );
}
});
$('.single-tabs').on('click', function() {
var offset = $('.tabs').width();
offset = offset/5;
var center = offset/2;
var tab = $(this).data('tab');
$('.tabs-content').hide();
$('.tab'+ tab +'').show();
var width = $(window).width();
if (width > 650) {
var arrow = tab*20-12;
$('.arrow-up').css('margin-left', '' + arrow + '%');
} else {
tab = tab - 1;
var position = offset * tab - center;
$('.ul-wrap').scrollLeft(position);
}
});

Found a fix, here's the JS is anyone needs it.
The - 55 in the var position is for an arrow that sits in the centre of the page below the elements I'm moving with this script.
$(window).on('load', function() {
$('.tab-3').trigger('click');
var width = $(window).width();
if (width < 651) {
var offset = $('.tabs').width();
offset = offset/7;
var center = offset/2;
var position = offset * 2 + center - 50;
$('.ul-wrap').animate({
scrollLeft: position
}, 200);
}
});
$('.single-tabs').on('click', function() {
var offset = $('.tabs').width();
offset = offset/7;
var center = offset/2;
var tab = $(this).data('tab');
$('.tabs-content').hide();
$('.tab'+ tab +'').show();
var width = $(window).width();
if (width > 650) {
var arrow = tab*20-12;
$('.arrow-up').css('margin-left', '' + arrow + '%');
} else {
tab = tab - 1;
var position = offset * tab + center - 50;
$('.ul-wrap').animate({
scrollLeft: position
}, 200);
}

Jquery follow scroll

I have a sort of sidebar on my website, which has to scroll down together with the user so that it is always in the view.
The code I'm using now is actually working fine however there is one problem. On smaller screens the sidebar scrolls before your at the sidebar thus making it impossible to see it all even if you scroll.
So what I want is the sidebar to scroll with the bottom instead of it being pushed down with the top so that when you reach the end of the sidebar it starts to scroll.
This is the code that I'm currently using.
var documentHeight = 0;
var topPadding = 10;
$(function() {
var offset = $("#mainright").offset();
documentHeight = $(document).height();
$(window).scroll(function() {
var sideBarHeight = $("#mainright").height();
if ($(window).scrollTop() > offset.top) {
var newPosition = ($(window).scrollTop() - offset.top) + topPadding;
var maxPosition = documentHeight - (sideBarHeight);
if (newPosition > maxPosition) {
newPosition = maxPosition;
}
$("#mainright").stop().animate({
marginTop: newPosition
});
} else {
$("#mainright").stop().animate({
marginTop: 0
});
};
});
});

I guess the "best practice" for accomplishing a task like this is to use dynamically changing css position from absolute to fixed and vice versa. A basic example could look like:
$(function(){
var $box = $('.box'),
offset = $box.offset(),
doc_h = $(document).height();
$(window).scroll(function(){
if($(window).scrollTop() > offset.top) {
if(!$box.hasClass('fix'))
$box.toggleClass('normal fix');
}
else{
if(!$box.hasClass('normal'))
$box.toggleClass('normal fix');
}
});
});​
Example in action: http://www.jsfiddle.net/YjC6y/14/

$(function() {
var top = 50;
$(window).scroll(function() {
$('#box').stop().animate({ top: $(window).scrollTop() + top}, 1000);
});
});
Try the example : http://jsbin.com/omiyi3

I think you can instead make the sidebar responsive by throwing your function into one of these:
if (responsive_viewport >= 768) {}
This makes it so that the function will only load if the viewport is bigger than or equal to 768px.