<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<!-- 부모 요소가 아무런 시각효과도 없을때 자식의 margin과 collapse 한다 -->
<style>
#parent {
/* border: 1px solid red; */
margin-top: 50px;
}
#child {
background-color: powderblue;
margin-top: 50px;
}
</style>
</head>
<body>
<div id="parent">
<div id="child">CHILD</div>
</div>
</body>
</html>
Backend Engineer