<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Events</title>
<style>
div {
width: 50px;
height: 5000px;
background-color: red;
}
</style>
</head>
<body>
<h1>Capturing Scroll Events</h1>
<div></div>
<script>
var pagetop;
window.addEventListener('scroll', function(){
pagetop = window.pageYOffset;
console.log(pagetop);
});
</script>
</body>
</html>스크롤하면 콘솔에 pagetop이 찍힘
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