<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#parent{
display:flex;
align-items: flex-start;
-webkit-align-items: flex-start;
height:200px;
border:1px solid #000;
}
#parent > div{
border:1px solid #267326;
padding:10px 0;
margin:10px;
width: 90px;
-webkit-flex: 1; /* Safari 6.1+ */
flex: 1;
}
</style>
</head>
<body>
<h1>CSS align-self Property</h1>
<div id="parent">
<div>Div 1</div>
<div>Div 2</div>
<div>Div 3</div>
</div>
<button onclick="myFunction()">Click Me</button>
<script>
var x = document.getElementById("parent").firstElementChild;
function myFunction(){
x.style.alignSelf = "center";
x.style.WebkitAlignSelf= "center";
}
</script>
<p><strong>Note</strong>: Click on the button to align the first child element to center.</p> </body>
</html>