Question

How does airbnb.com achieves the animation when you mouse over the logo ? I think it uses css3 but I wasn’t fully able to understand it.

Answer 1

You are correct, it uses CSS3 animation:

@-webkit-keyframes wiggle {
  0% {
    -webkit-transform: rotate3d(0,0,0,0deg)
  }

  25% {
    -webkit-transform: rotate3d(0,0,0,5deg)
  }

  75% {
    -webkit-transform: rotate3d(0,0,0,-5deg)
  }

  100% {
    -webkit-transform: rotate3d(0,0,0,0deg)
  }
}

@-moz-keyframes wiggle {
  0% {
    -moz-transform: rotate(0deg)
  }

  25% {
    -moz-transform: rotate(5deg)
  }

  75% {
    -moz-transform: rotate(-5deg)
  }

  100% {
    -moz-transform: rotate(0deg)
  }
}

#logo:hover {
  -webkit-animation: wiggle .2s ease-in-out alternate;
  -moz-animation: wiggle .2s ease-in-out alternate;
  -ms-animation: wiggle .2s ease-in-out alternate
}

#logo:hover img {
  opacity: .8;
  -ms-filter: "alpha(opacity=80)";
  filter: alpha(opacity=80)
}