<html>
<head>
<style>
.main-display {
border:2px solid green;
background:green ;
padding:20px;
width:300px;
display:contents;
}
.contents-val {
padding:5px;
background:gold;
border:2px solid black;
}
.main-display2 {
border:2px solid green;
background:green ;
padding:20px;
width:300px;
}
.contents-val2 {
padding:5px;
background:gold;
border:2px solid black;
}
</style>
</head>
<body>
<div class="main-display">
<div class="contents-val">With display:contents</div>
</div>
<br>
<div class="main-display2">
<div class="contents-val2">Without display:contents</div>
</div>
</body>
</html>