Use the transitionTimingFunction property to set the speed of the transition. Set it to any of the following values − ease, ease-in, ease-out, linear, etc.
Example
You can try to run the following code to return the speed curve of the transition effect with JavaScript −
<!DOCTYPE html>
<html>
<head>
<style>
#div1 {
position: relative;
margin: 10px;
height: 300px;
width: 400px;
padding: 20px;
border: 2px solid blue;
}
#div2 {
padding: 80px;
position: absolute;
border: 2px solid BLUE;
background-color: yellow;
transform: rotateY(45deg);
transition: all 5s;
}
#div2:hover {
background-color: orange;
width: 50px;
height: 50px;
padding: 100px;
border-radius: 50px;
}
</style>
</head>
<body>
<p>Hover over DIV2</p>
<button onclick = "display()">Set</button>
<div id = "div1">DIV1
<div id = "div2">DIV2</div>
</div>
<script>
function display() {
document.getElementById("div2").style.transitionTimingFunction =
"ease-in";
}
</script>
</body>
</html>