<!DOCTYPE html>
<html>
<head>
<style>
#main {
width: 350px;
height: 350px;
border: 1px solid #c3c3c3;
display: flex;
flex-direction: row;
}
#main div {
width: 50px;
height: 50px;
}
</style>
</head>
<body>
<h1>Change flex-direction with JavaScript</h1>
<div id="main">
<div style="background-color:coral;">A</div>
<div style="background-color:lightblue;">B</div>
<div style="background-color:khaki;">C</div>
<div style="background-color:pink;">D</div>
<div style="background-color:lightgrey;">E</div>
<div style="background-color:lightgreen;">F</div>
</div>
<p>Click the "Try it" button to set the value of the flexDirection property to "column-reverse".</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
document.getElementById("main").style.flexDirection = "column-reverse";
}
</script>