ease , ease out , ease in , linear meaning in html
snippet in html

ease , ease out , ease in , linear meaning in html

user4930

ease = starts slow , speeds in middle and slow again in the end.
ease-in  = slow in the beginning , speeds up  in the end.
ease-out = speeds in the beginning, slow in the end.
linear = as the name suggest, i.e. constant speed throughout the animation.


ease-in-out = starts slow, fastest in the middle , slow again in the end.



DIFFERENCE BETWEEN EASE & EASE-IN-OUT :

ease is like ease-in-out , but in ease the starting time of speeding
is less than the starting time of speeding in ease-in-out.
That means in ease the animation will start speeding before the animation 
speeds in ease-in-out.

ease animation in css

user9411

<!DOCTYPE html>
<html>
<head>
<style> 
div {
  width: 100px;
  height: 50px;
  background: red;
  color: white;
  font-weight: bold;
  position: relative;
  animation: mymove 5s infinite;
  animation-direction: alternate-reverse;
}

#div1 {animation-timing-function: linear;}
#div2 {animation-timing-function: ease;}
#div3 {animation-timing-function: ease-in;}
#div4 {animation-timing-function: ease-out;}
#div5 {animation-timing-function: ease-in-out;}

@keyframes mymove {
  from {left: 0px;}
  to {left: 300px;}
}
</style>
</head>
<body>

<p><strong>Note:</strong> The animation-timing-funtion property is not supported in Internet Explorer 9 and earlier versions.</p>
<div id="div1">linear</div>
<div id="div2">ease</div>
<div id="div3">ease-in</div>
<div id="div4">ease-out</div>
<div id="div5">ease-in-out</div>

</body>
</html>