JSFiddle - React, Tailwind, and code Playground

by Petra1999

HTML

<aside>

  jskldjfkldsf

</aside>

<main>
  ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />  ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />  ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />  ajksdlfsdfsdf<br />ajksdlfsdfsdf<br />ajksdlfsdfsdf<br...

CSS

aside {
  position: sticky;
  top: 100px;
  left: 50px;
  background: yellow;
  width: 100px;
}

main {
  position: relative;
  left: 300px;
  top: 100px;
  background: orange;
}