CODE EXAMPLE FOR JAVASCRIPT

clickable image full screen javascript

#fullpage {
  display: none;
  position: absolute;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-size: contain;
  background-repeat: no-repeat no-repeat;
  background-position: center center;
  background-color: black;
}