css hamburger button

Displays a hamburger menu that transforms into a cross button on hover.

Use a container with top, bottom and middle bars. .hamburger-menudiv
Set the container to with . display: flexflex-flow: column wrap
Use to add distance between bars. justify-content: space-between
Used to rotate the top and bottom bars 45 degrees and fade the middle bar on hover. transform: rotate()opacity: 0
Use to rotate the bar around the left point. transform-origin: left

<div class="hamburger-menu">
  <div class="bar top"></div>
  <div class="bar middle"></div>
  <div class="bar bottom"></div>
</div>

.hamburger-menu {
  display: flex;
  flex-flow: column wrap;
  justify-content: space-between;
  height: 2.5rem;
  width: 2.5rem;
  cursor: pointer;
}

.hamburger-menu .bar {
  height: 5px;
  background: black;
  border-radius: 5px;
  margin: 3px 0px;
  transform-origin: left;
  transition: all 0.5s;
}

.hamburger-menu:hover .top {
  transform: rotate(45deg);
}

.hamburger-menu:hover .middle {
  opacity: 0;
}

.hamburger-menu:hover .bottom {
  transform: rotate(-45deg);
}