CSS customized scroll bar in div

Question

How can I customize a scroll bar via CSS (Cascading Style Sheets) for one div and not the whole page?

Answer 1

Suppose you have the div as

 ... 

Apply CSS Styles as

//custom scroll style definitions
.custom_scroll
{
  overflow-y: scroll;
}

//custom_scroll scrollbar styling
.custom_scroll::-webkit-scrollbar-track
{
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
    border-radius: 10px;
    opacity: 0.5;
    //background-color: #F5F5F5;
}

.custom_scroll::-webkit-scrollbar
{
    width: 5px;
    opacity: 0.5;
    //background-color: #F5F5F5;
}

.custom_scroll::-webkit-scrollbar-thumb
{
    border-radius: 10px;
    opacity: 0.5;
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
    //background-color: #555;
}

Resulting Scroll will appear as