Adding a vertically scrollable item inside a horizontal carousel - html

Question

I'm building a customised horizontal carousel, where in I want to display some items which are vertically scroll-able.
Code I've tried so far:
html
<div class="carousel">
<div class="c-item">Item-1</div>
<!-- to be displayed vertically -->
<div class="abs">
<div class="a-item">Abs Item-1.1</div>
<div class="a-item">Abs Item-1.2</div>
<div class="a-item">Abs Item-1.3</div>
</div>
<div class="c-item margin">Item-2</div>
<!-- to be displayed vertically -->
<div class="abs">
<div class="a-item">Abs Item-2.1</div>
<div class="a-item">Abs Item-2.2</div>
<div class="a-item">Abs Item-2.3</div>
</div>
</div>
<div class="other">
Other div
</div>
css
.carousel{
color: #FFF;
white-space: nowrap;
overflow-x: auto;
overflow-y: hidden;
position: initial;
.c-item{
display: inline-block;
width: 35%;
background: #000;
height: 100px;
&.margin{
//margin-left: 35%;
}
}
.abs{
background: #444;
display: inline-block;
vertical-align: top;
width: 35%;
max-height: 180px;
overflow-y: auto;
.a-item{
height: 100px;
border: 1px solid #000;
}
}
}
.other{
background: yellow;
}
Result:
(codepen)
The problem here is: I want the other div to start just below the item-1; meaning that the vertically scrolled div should be overlapping the other div and the carousel height should be fixed at 100px. I tried using position: absolute for the .abs div but then that div doesn't move on scrolling the carousel.
Desired output will look like this:

Answer 1

A flexbox solution
Each item is 33.33% wide and 100px high. The items inside .multiple are also 100px high.
.multiple has position: relative and overflow-y: auto. The items inside have position: absolute.
Hint: Container -> position: relative, items inside -> position: absolute. That's how it works.
top: (100 * n)px for each <div> inside .item.multiple. n is the index of the <div> inside .item.multiple, starting with 0.
The HTML structure has been changed
* {
box-sizing: border-box;
}
body {
margin: 0;
}
.carousel {
display: flex;
width: 100vw;
overflow-x: auto;
color: white;
}
.carousel>.item {
flex: 1 0 33.33%;
//margin-right: 5px;
}
.carousel>.item:nth-child(odd) {
background: black;
}
.carousel>.item:nth-child(even) {
background: darkgrey;
}
.carousel>.item,
.carousel>.item.multiple>div {
height: 100px;
}
.carousel>.item.multiple {
position: relative;
overflow-y: auto;
}
.carousel>.item.multiple>div {
position: absolute;
width: 100%;
}
.carousel>.item.multiple>div:nth-child(2) {
top: 100px;
}
.carousel>.item.multiple>div:nth-child(3) {
top: 200px;
}
/* And so on ...
.carousel>.item.multiple>div:nth-child(...) {}
*/
<div class="carousel">
<div class="item">
<div>Item-1</div>
</div>
<div class="item multiple">
<div>Item-1.1</div>
<div>Item-1.2</div>
<div>Item-1.3</div>
</div>
<div class="item">
<div>Item-2</div>
</div>
<div class="item multiple">
<div>Item-2.1</div>
<div>Item-2.2</div>
<div>Item-2.3</div>
</div>
</div>
<div class="other">
Other div
</div>

Answer 2

Your desired result mean making the child overlap the parent, and i don't think that's possible. BUT you can "hack" this by wrapping the .carousel with another div (.demo it this general example), so the results will be something like this:
.demo {overflow: visible; height: 100px;}
.carousel {
color: #FFF;
white-space: nowrap;
overflow-x: auto;
overflow-y: hidden;
position: initial;
}
.carousel .c-item {
display: inline-block;
width: 35%;
background: #000;
height: 100px;
}
.carousel .abs {
background: #444;
display: inline-block;
vertical-align: top;
width: 35%;
max-height: 180px;
overflow-y: auto;
}
.carousel .abs .a-item {
height: 100px;
border: 1px solid #000;
}
.other {
background: yellow;
height: 200px;
}
<div class="demo">
<div class="carousel">
<div class="c-item">Item-1</div>
<div class="abs">
<div class="a-item">Abs Item-1.1</div>
<div class="a-item">Abs Item-1.2</div>
<div class="a-item">Abs Item-1.3</div>
</div>
<div class="c-item margin">Item-2</div>
<div class="abs">
<div class="a-item">Abs Item-2.1</div>
<div class="a-item">Abs Item-2.2</div>
<div class="a-item">Abs Item-2.3</div>
</div>
</div>
</div>
<div class="other">
Other div
</div>
As you can see from the snippet the scroll-x doesn't show - yet it exist. You can click one of the .carousel item and scroll them right and left.
Since it's not obvious that the .carousel is scrolling, you can add extra buttons to scroll it:
.demo {overflow: visible; height: 100px;z-index: 3;}
.carousel {
color: #FFF;
white-space: nowrap;
overflow-x: auto;
overflow-y: hidden;
position: initial;
}
.carousel .c-item {
display: inline-block;
width: 35%;
background: #000;
height: 100px;
}
.carousel .abs {
background: #444;
display: inline-block;
vertical-align: top;
width: 35%;
max-height: 180px;
overflow-y: auto;
}
.carousel .abs .a-item {
height: 100px;
border: 1px solid #000;
}
.other {
background: yellow;
height: 200px;
}
<div class="demo">
<button onclick="document.querySelectorAll('.carousel')[0].scrollLeft += 20;" style="position: fixed; top: 50%; right: 0;">L</button>
<button onclick="document.querySelectorAll('.carousel')[0].scrollLeft -= 20;" style="position: fixed; top: 50%; left: 0;">R</button>
<div class="carousel">
<div class="c-item">Item-1</div>
<div class="abs">
<div class="a-item">Abs Item-1.1</div>
<div class="a-item">Abs Item-1.2</div>
<div class="a-item">Abs Item-1.3</div>
</div>
<div class="c-item margin">Item-2</div>
<div class="abs">
<div class="a-item">Abs Item-2.1</div>
<div class="a-item">Abs Item-2.2</div>
<div class="a-item">Abs Item-2.3</div>
</div>
</div>
</div>
<div class="other">
Other div
</div>
Hope that helps!

Answer 3

You have to play with position check snippet.
* {
box-sizing: border-box;
}
body {
margin: 0;
}
.carousel {
display: flex;
width: 100vw;
overflow-x: auto;
color: white;
}
.carousel>.item {
flex: 1 0 33.33%;
//margin-right: 5px;
}
.carousel>.item:nth-child(odd) {
background: black;
}
.carousel>.item:nth-child(even) {
background: darkgrey;
}
.carousel>.item,
.carousel>.item.multiple>div {
height: 100px;
}
.carousel>.item.multiple {
position: relative;
overflow-y: auto;
height: 200px;
}
.carousel>.item.multiple>div {
position: absolute;
width: 100%;
}
.carousel>.item.multiple>div:nth-child(2) {
top: 100px;
}
.carousel>.item.multiple>div:nth-child(3) {
top: 200px;
}
.other {
position: absolute;
z-index: -1;
top: 100px;
width: 100%;
background: green;
height: 117px;
}
/* And so on ...
.carousel>.item.multiple>div:nth-child(...) {}
*/
<div class="carousel">
<div class="item">
<div>Item-1</div>
</div>
<div class="item multiple">
<div>Item-1.1</div>
<div>Item-1.2</div>
<div>Item-1.3</div>
</div>
<div class="item">
<div>Item-2</div>
</div>
<div class="item multiple">
<div>Item-2.1</div>
<div>Item-2.2</div>
<div>Item-2.3</div>
</div>
</div>
<div class="other">
Other div
</div>