Как стилизовать оптимально скролл? Есть еще условия...
С помощью css свойств:
#elWithScroll {
overflow-y: scroll;
height: 500px;
}
/* width */
#elWithScroll::-webkit-scrollbar {
width: 10px;
}
/* Track */
#elWithScroll::-webkit-scrollbar-track {
background: #f1f1f1;
}
/* Handle */
#elWithScroll::-webkit-scrollbar-thumb {
background: purple;
height: 5px;
border-radius: 5px;
}
/* Handle on hover */
#elWithScroll ::-webkit-scrollbar-thumb:hover {
background: #555;
}
<div id='elWithScroll'>
<h2>Custom Scrollbar Example</h2>
<p><strong>Note:</strong> The -webkit-scrollbar is not supported by Firefox or IE and Edge.</p>
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</div>
P.S Но такой как ты хочешь скорее всего на js нужно делать.
Сборка персонального компьютера от Artline: умный выбор для современных пользователей