.onclick-menu {
    position: relative;
    display: inline-block;
    cursor:pointer;
    width: 100px;
}

.onclick-menu:before {
    cursor:pointer;
    width: 100px;
}

.onclick-menu:focus {
  /* clicking on label should toggle the menu */
  pointer-events: none;
  cursor:pointer;
  width: 100px;
  width: 100px;
  outline: none;
}

.onclick-menu:focus .onclick-menu-content {
  /*  opacity is 1 in opened state (see below) */
  opacity: 1;
  visibility: visible;
  cursor:pointer;
  width: 100px;

  /* don't let pointer-events affect descendant elements */
  pointer-events: auto;
}

.onclick-menu-content {
  position: absolute;
  z-index: 1;
  width: 100px;
  background-color: white;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);

  /* use opacity to fake immediate toggle */
  opacity: 0;
  visibility: hidden;
  transition: visibility 0.5s;
  -webkit-transition: visibility 0.5s;
}