Smaller horizontal scrollbar than div width? + No figcaption? - css

Question

I'm trying to do image "carousel" with horizontal scroll. Pure HTML + CSS without JS.
This is my HTML:
<div class="slideshow">
<figure class="slideshow__fig">
<img src="img/hilti-png.png" alt="" class="slideshow__fig-img">
<figcaption>Fig.1 - Trulli, Puglia, Italy.</figcaption>
</figure>
<figure class="slideshow__fig">
<img src="img/hilti-png.png" alt="" class="slideshow__fig-img">
<figcaption>Fig.1 - Trulli, Puglia, Italy.</figcaption>
</figure>
<figure class="slideshow__fig">
<img src="img/hilti-png.png" alt="p" class="slideshow__fig-img">
<figcaption>Fig.1 - Trulli, Puglia, Italy.</figcaption>
</figure>
</div>
This is my css:
.slideshow {
display: flex;
flex-wrap: nowrap;
overflow-y: hidden;
overflow-x: scroll;
//width: 80vw;
//margin: auto;
&::-webkit-scrollbar {
width: 350px;
height: 10px;
}
/* Track */
&::-webkit-scrollbar-track {
background: #f1f1f1;
}
/* Handle */
&::-webkit-scrollbar-thumb {
background: #888;
border-radius: 500px;
}
/* Handle on hover */
&::-webkit-scrollbar-thumb:hover {
background: #555;
}
&__fig {
flex: 0 0 auto;
height: 900px;
&-img{
height: 100%;
//width: 100%;
display: block;
}
}
}
1 - The problem is when I set the width of the .slideshow to 80vw, then naturally the scrollbar is shorter, but my images are cropped and not going full display width. When I try to adjust the width of the scrollbar with ::-webkit-scrollbar {width: 350px or 50vw or ...} exactly nothing happens.
I would like to have a scrollbar which is not full width of the div which I'm scrolling, but somehow can't figure it out.
2 - The other problem is I would like to have a figcaption at the bottom left side of the image. But somehow it doesn't show when the horizontal scroll is there. Any suggestions?
Here is the example how I would like to have it:
example image
edit: Now I finally managed to do it by adding:
&::-webkit-scrollbar-button:end:increment {
width: 50%;
display: block;
background: transparent;
}
But now the problem is that the scrollbar is not in middle, but on the left side. Margin:auto doesn't help. No idea how else to do it.
Also making img size 90% revealed the caption which is not that bad solution.
Now the only question is how to put the scroll bar in the centre.

Answer 1

Here is something close to the image you provided as an example. Sorry, but I really don't know how this can be achieved respecting the Pure HTML + CSS without JS criteria. I think it isn't possible at all.
So here, it uses jQuery and jQuery-ui draggable.
It uses a draggable div contained within its parent. Ondrag, it calculates the "scrolled" percentage to apply it to the scrollable width of the image slider.
For mobiles... I added the "touch punch" patch for jQuery-ui. More details about it here. I also placed the "initialisation code" in a function, so it can run on load AND on resize.
$(document).ready(function(){
function initDisplay(){
let slide_scrollWidth = $("#slide")[0].scrollWidth;
let customScrollbar_width = $("#sliderScroll_outer")[0].scrollWidth;
let percent = slide_scrollWidth/customScrollbar_width
$("#sliderScroll").css({"width":percent+"%", "left":0})
$("#slide")[0].scrollTo(0,0)
}
// On page load
initDisplay()
// Useful for mobile orientation change
window.onresize = initDisplay
$("#sliderScroll").draggable({
containment: "#sliderScroll_outer",
scroll: false,
drag: function(e){
let parentOffset = $(e.target).parent().offset().left
let offset = $(e.target).offset().left
let scrollableWidth = $(e.target).parent().width() - $(e.target).width()
let sliderPercent = (offset-parentOffset)/scrollableWidth
//console.log(sliderPercent)
let imageSliderWidth = $("#slide")[0].scrollWidth - $("#slide").width()
//console.log(imageSliderWidth)
$("#slide")[0].scrollTo(sliderPercent*imageSliderWidth,0)
}
});
});
#container{
margin: 1em;
}
#slide{
display: flex;
overflow: hidden;
}
#slide img{
margin: 0 0.5em;
}
#sliderScroll_outer{
width: 40vw;
background: lightgrey;
margin: 1em;
}
#sliderScroll{
width: 0vw;
height: 10px;
background: green;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui-touch-punch/0.2.2/jquery.ui.touch-punch.min.js"></script>
<div id="container">
<div id="slide">
<img src="https://via.placeholder.com/800x600.png">
<img src="https://via.placeholder.com/400x600.png">
<img src="https://via.placeholder.com/1000x600.png">
</div>
<div id="sliderScroll_outer">
<div id="sliderScroll"></div>
</div>
</div>
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