My fixed div overlaps the browser's scrollbar.

edit

To fix this issue, you can apply a padding-right property to the parent element of the fixed div that is equal to the width of the scrollbar.

For example, if your scrollbar width is 15px, you can add the following CSS to the parent element:

.parent-element {
  padding-right: 15px;
}

This will create some space on the right side of the parent element where the scrollbar will be placed, allowing your fixed div to stay within the browser's window.