What causes the fixed div to appear when scrolling horizontally?

Question

What causes the fixed div to appear when scrolling horizontally?

I have replicated this issue in a live example: http://jsfiddle.net/pda2yc6s

When scrolling vertically, a specific div element sticks to the top. However, if the window is narrower than the wrapper's width and you scroll horizontally, the sticky element overflows its parent div.

https://i.sstatic.net/c9Nxu.gif

Below is the CSS code involved:


div#wrapper {
    background-color: #ffffff;
    margin: 0 auto;
    width: 1058px;
}
div#mainContent {
    float: left;
    width: 728px;
}
div#sideBar {
    float: right;
    width: 300px;
}
.stick {
    background-color: #ffffff;
    border-bottom: 1px solid;
    position: fixed;
    top: 0;
    height: 46px;
    width: 728px;
}

This JavaScript snippet makes the sticky functionality work:


$(document).ready(function () {
    var s = $("#mainContent h1");
    s.wrap('<div class="sticky-wrapper"></div>');
    var pos = s.position();
    var t = $('.sticky-wrapper');
    $(window).scroll(function () {
        var windowpos = $(window).scrollTop();
        if (windowpos >= pos.top) {
            t.height(46);
            s.addClass("stick");
        } else {
            t.removeAttr('style');
            s.removeClass("stick");
        }
    });
});

Why is the sticky element misbehaving in this way? What could be a potential solution?

javascript jquery css

Answer 1

Answer №1

Let's start with the basics:

According to http://www.w3.org/TR/css3-positioning/#fixed-pos

...for a fixed positioned box, the containing block is established by the viewport...

Therefore, you cannot have an element with a fixed position and still keep it confined within its immediate parent.

From the same reference:

For continuous media, fixed boxes do not move when the document is scrolled

This means that a fixed element will remain stationary even when you scroll vertically or horizontally.

The issue at hand is that your page's width exceeds the viewport width, causing horizontal scrolling. While your sticky (fixed) div has the same width as your main div, it won't move when scrolled horizontally, leading to it covering your sidebar as the content shifts left.

If restructuring your markup to stay within the viewport width isn't feasible (to prevent horizontal scrolling), then you'll need to manually adjust the left property as you scroll.

You already have a window scroll event listener in place. Within it, add code to modify the left property like this:

$(window).scroll(function () {
    ...
    var winleft = $(window).scrollLeft();
    if (windowpos >= pos.top) {
        ...
        s.css({'left': -(winleft)});
...

Here's your updated fiddle with the changes implemented: http://jsfiddle.net/abhitalks/pda2yc6s/6/

This approach involves adjusting the left property based on the scrolled horizontal distance. It ensures that your fixed sticky div stays above your main content without obstructing the sidebar.

Note: This solution may not be ideal aesthetically. Consider revisiting your markup and design choices.

.

Answer 2

Let's start with the basics:

According to http://www.w3.org/TR/css3-positioning/#fixed-pos

...for a fixed positioned box, the containing block is established by the viewport...

Therefore, you cannot have an element with a fixed position and still keep it confined within its immediate parent.

From the same reference:

For continuous media, fixed boxes do not move when the document is scrolled

This means that a fixed element will remain stationary even when you scroll vertically or horizontally.

The issue at hand is that your page's width exceeds the viewport width, causing horizontal scrolling. While your sticky (fixed) div has the same width as your main div, it won't move when scrolled horizontally, leading to it covering your sidebar as the content shifts left.

If restructuring your markup to stay within the viewport width isn't feasible (to prevent horizontal scrolling), then you'll need to manually adjust the left property as you scroll.

You already have a window scroll event listener in place. Within it, add code to modify the left property like this:

$(window).scroll(function () {
    ...
    var winleft = $(window).scrollLeft();
    if (windowpos >= pos.top) {
        ...
        s.css({'left': -(winleft)});
...

Here's your updated fiddle with the changes implemented: http://jsfiddle.net/abhitalks/pda2yc6s/6/

This approach involves adjusting the left property based on the scrolled horizontal distance. It ensures that your fixed sticky div stays above your main content without obstructing the sidebar.

Note: This solution may not be ideal aesthetically. Consider revisiting your markup and design choices.

.

Answer 3

Answer №2

To modify your css, follow these steps:

div#sideBar 
{
    float: right;
    width: 300px;
    z-index:1;
    position: relative;
}

.stick 
{
    background-color: #ffffff;
    border-bottom: 1px solid;
    position: fixed;
    top: 0;
    height: 46px;
    width: 728px;
    z-index:0;
}

If you increase the z-index for the sideBar (along with a relative position), it will cause the stick element to be covered by the sidebar. This should achieve the desired effect. You can view the updated version on your fiddle http://jsfiddle.net/pda2yc6s/2/

Answer 4

To modify your css, follow these steps:

div#sideBar 
{
    float: right;
    width: 300px;
    z-index:1;
    position: relative;
}

.stick 
{
    background-color: #ffffff;
    border-bottom: 1px solid;
    position: fixed;
    top: 0;
    height: 46px;
    width: 728px;
    z-index:0;
}

If you increase the z-index for the sideBar (along with a relative position), it will cause the stick element to be covered by the sidebar. This should achieve the desired effect. You can view the updated version on your fiddle http://jsfiddle.net/pda2yc6s/2/

Answer 5

Answer №3

Due to the positioning in CSS:

By setting the position as fixed, it is currently working like sticky.

Modify to:

.stick {
    background-color: #ffffff;
    border-bottom: 1px solid;
    position: static;
    top: 0;
    height: 46px;
    width: 728px;
}

For further information on POSITION, you can visit:

Answer 6

Due to the positioning in CSS:

By setting the position as fixed, it is currently working like sticky.

Modify to:

.stick {
    background-color: #ffffff;
    border-bottom: 1px solid;
    position: static;
    top: 0;
    height: 46px;
    width: 728px;
}

For further information on POSITION, you can visit:

Answer 7

Answer №4

attempt:

html, body {
    margin: 0;
    padding: 0;
}
body {
    background-color: #eeeeee;
    color: #555555;
    font-size: 14px;
    line-height: 19px;
}
div#wrapper {
    background-color: #f8f8f8;
    margin: 0 auto;
    width: 100%;
}
div#mainContent {
    float: left;
    width: 65%;
    border: 1px solid #dddddd;
}
div#sideBar {
    float: right;
    width: 35%;
    border: 1px solid #dddddd;
}
.clearfix {
    clear: both;
}
h2 {
    line-height: 1.8em;
    margin: 0 auto;
}
.container {
    width: 320px;
    height: 620px;
    background-color: #bbbbbb;
}
.sticky {
    background-color: #f8f8f8;
    border-bottom: 1px solid #cccccc;
    position: fixed;
    top: 0;
    height: 50px;
    width: 65%;
}

http://jsfiddle.net/pda2yc6s/9/

Answer 8

attempt:

html, body {
    margin: 0;
    padding: 0;
}
body {
    background-color: #eeeeee;
    color: #555555;
    font-size: 14px;
    line-height: 19px;
}
div#wrapper {
    background-color: #f8f8f8;
    margin: 0 auto;
    width: 100%;
}
div#mainContent {
    float: left;
    width: 65%;
    border: 1px solid #dddddd;
}
div#sideBar {
    float: right;
    width: 35%;
    border: 1px solid #dddddd;
}
.clearfix {
    clear: both;
}
h2 {
    line-height: 1.8em;
    margin: 0 auto;
}
.container {
    width: 320px;
    height: 620px;
    background-color: #bbbbbb;
}
.sticky {
    background-color: #f8f8f8;
    border-bottom: 1px solid #cccccc;
    position: fixed;
    top: 0;
    height: 50px;
    width: 65%;
}

http://jsfiddle.net/pda2yc6s/9/

Answer 9

Answer №5

To make the ".stick" class position value absolute in the CSS file, simply change it to:

position:absolute;

This adjustment should solve the issue!

Answer 10

To make the ".stick" class position value absolute in the CSS file, simply change it to:

position:absolute;

This adjustment should solve the issue!

Answer 11

Answer №6

The reason for this discrepancy is that the fixed left position is based on the screen's left side rather than the document's left side. This causes the sticky header and its parent div to not align perfectly, even if they both have a width of 728px.

If you don't require horizontal scrolling, it's best to adjust the content to fit within a layout that doesn't scroll horizontally. Otherwise, you'll need to constantly reevaluate the left position of the sticky header with every horizontal scroll change.

If you need assistance with this issue, feel free to reach out and I can provide you with a fiddle showcasing the solution.

UPDATE

http://jsfiddle.net/dango_x_daikazoku/g589jk0v/1/

 var left = $("body").scrollLeft();

s.css("left", -left + "px");

Answer 12

The reason for this discrepancy is that the fixed left position is based on the screen's left side rather than the document's left side. This causes the sticky header and its parent div to not align perfectly, even if they both have a width of 728px.

If you don't require horizontal scrolling, it's best to adjust the content to fit within a layout that doesn't scroll horizontally. Otherwise, you'll need to constantly reevaluate the left position of the sticky header with every horizontal scroll change.

If you need assistance with this issue, feel free to reach out and I can provide you with a fiddle showcasing the solution.

UPDATE

http://jsfiddle.net/dango_x_daikazoku/g589jk0v/1/

 var left = $("body").scrollLeft();

s.css("left", -left + "px");

What causes the fixed div to appear when scrolling horizontally?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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