how to position fixed div at top code example

Example 1: how to middle fixed element

position: fixed;
	top: 0;
	z-index: 100;
	left: 50%;
	transform: translateX(-50%);

Example 2: how to fix the nav bar to the left of the page

.sidenav {
  height: 100%;
  width: 160px;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  overflow-x: hidden;
}

Example 3: fixed within the div css

#wrapper { width: 300px; background: orange; margin: 0 auto; position: relative; }
#feedback { position: fixed; right: 0; top: 120px; }

<div id="wrapper">
    ...
    <a id="feedback" href="#">Feedback</a>
</div>