using transition css code example

Example 1: display transition css

div {
  background-color: blue;
  padding: 40px;
  color: white;
  cursor: pointer;
  transition: all .1s ease;
}

.hidden {
  visibility: hidden;
  opacity: 0;
  max-height: 0%;
}

.hidden:hover {
  visibility: visible;
  opacity: 1;
  max-height: 1000px;
}
<div class="hidden"></div>

Example 2: transition transform

/* Transition Transform */
.section:hover {
  transform: translateX(0px) translateY(75px);
}

.section {
  transition: transform 500ms ease-in-out 25ms;
}

Example 3: css transform transition

.selector {
  transition: transform 1s;
}