<!DOCTYPE html>
<html lang="ko">
<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></title>
</head>
<body>
<input type="button" value="changeColor" onclick="fn_colorChange()">
<ul>
<li>banana</li>
<li>apple</li>
<li>mango</li>
</ul>
<!-- cdn에서 제이쿼리 불러오기 -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
// 버튼을 누르면 li 컬러가 red로 변하는 함수(한번 실행)
function fn_colorChange() {
$('li').css('color', 'red');
}
</script>
</body>
</html>