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<!DOCTYPE html>
<html>
<head>
<style> 
#main {
  width: 400px;
  height: 150px;
  border: 1px solid #000000;
  display: flex;
  justify-content: space-around; 
}
#main div {
  width: 70px;
  height: 70px;
}
</style>
</head>
<body>
<h1>Change justify-content with JavaScript</h1>
<div id="main">
  <div style="background-color:coral;"></div>
  <div style="background-color:lightblue;"></div>
  <div style="background-color:pink;"></div>
</div>
<p>Click the "Try it" button to set the value of the justifyContent property to "space-between"</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
  document.getElementById("main").style.justifyContent = "space-between";
}
</script>
</body>
</html>