<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=\, initial-scale=1.0">
<title>클래스제어-자바스크립트</title>
<script src="jquery-3.5.1.min.js"></script>
<style>
#greeting,
.btns {
text-align: center;
}
#greeting {
background: #eee;
color: crimson;
padding: 20px;
}
#greeting.active {
background: crimson;
color: #eee;
}
</style>
</head>
<body>
<div class="frame">
<h1 id="greeting">
Good to see you! I'm Mingeee
</h1>
</div>
<div class="btns">
<button id="btn1">클래스 추가하기</button>
<button id="btn2">클래스 제거하기</button>
<button id="btn3">클래스 토글하기</button>
<button id="btn4">요소 내에 텍스트 변경하기</button>
</div>
<script>
$('#btn1').click(function () {
$('#greeting').addClass('active')
})
$('#btn2').click(function () {
$('#greeting').removeClass('active')
})
$('#btn3').click(function () {
$('#greeting').toggleClass('active')
})
$('#btn4').click(function () {
$('#greeting').text('You clicked the toggle button')
})
</script>
</body>
</html>