EXAMPLE
Run 
<!DOCTYPE html>
<html>

<head>
	<title>The justify-tracks property in CSS</title>
	<style type="text/css">
		.grid {
	  display: grid;
	  gap: 10px;
	  grid-template-columns: masonry;
	  grid-template-rows: repeat(3, 100px);
	  color: red;
	  justify-tracks: start;
	}
	.item{
		inline-size: 1.2em;
		justify-tracks: space-between;
		}
	</style>
</head>

<body>
	<div class="grid">
		<div class="Item">Item 1</div>
		<div class="Item">Item 2</div>
		<div class="Item">Item 3</div>
	</div>
</body>

</html>