How to make ::-webkit-scrollbar-thumb smaller? - html

Question

I customize scrollbar by CSS3. And I don't know, how to make scrollbar-thumb smaller (shorter). Width or height don't work. Can anybody help me?
#parent {
width: 300px;
height: 300px;
padding: 20px;
overflow: auto;
}
#child {
width: 250px;
height: 1000px;
margin: 0 auto;
border: 2px solid #8c1b21;
}
#parent::-webkit-scrollbar {
width: 15px;
background-color: #B79889;
border-radius: 5px;
box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
}
#parent::-webkit-scrollbar-thumb {
background-color: #8c1b21;
border-radius: 5px;
}
<div id="parent">
<div id="child"></div>
</div>

Answer 1

Height of thumb depends on the height of the div where you are applying scroll
#parent {
width: 300px;
height: 300px;
padding: 20px;
overflow: auto;
}
#child {
width: 250px;
height: 4000px;
margin: 0 auto;
border: 2px solid #8c1b21;
}
#parent::-webkit-scrollbar {
width: 10px;
background-color: #B79889;
border-radius: 5px;
box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
}
#parent::-webkit-scrollbar-thumb {
background-color: #8c1b21;
border-radius: 5px;
}
<div id="parent">
<div id="child"></div>
</div>

Answer 2

I've come across a lot of methods for this very problem; the usual answer is create a div, make a custom scroll bar (don't), or don't bother. This is a solution I found previously to solve this problem:
border-top: 15px solid transparent;
border-bottom: 35px solid transparent;
background-clip: padding-box;
Basically surround the track with transparent thicc borders, ie. shorten the track.

Answer 3

This works for me, "::-webkit-scrollbar /width" is the key
::-webkit-scrollbar-track
{
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
background-color: #F5F5F5;
}
::-webkit-scrollbar
{
width: 4px !important;
background-color: #F5F5F5;
}
::-webkit-scrollbar-thumb
{
background-color: $apple-gray;
}