<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>aaa</title>
<script>
//방법1
document.addEventListener("DOMContentLoaded",function(){
//const h1 = document.querySelector("h1");//h1 태그 불러오기
const h1 = document.querySelector("#box");//id가 box인 요소 찾아 h1변수에 담기
const btn = document.querySelector(".btn");
//const but = document.querySelector("[type=button]");
btn.addEventListener("click",function(){
h1.textContent="즐거운 시간!!";
clickTest(); //함수 호출
})
});
function clickTest(){
alert("Hello javascript");
}
/*
//방법2
document.addEventListener("DOMContentLoaded",function(){
//const h1 = document.querySelector("h1");//h1 태그 불러오기
const h1 = document.querySelector("#box");//id가 box인 요소 찾아 h1변수에 담기
const btn = document.querySelector(".btn");
//const but = document.querySelector("[type=button]");
btn.addEventListener("click",function(){
h1.textContent="즐거운 시간!!";
alert("Hello javascript");
})
});
*/
</script>
</head>
<body>
<h1 id="box"></h1>
<!-- <button type="button" class="btn">버튼 클릭</button> -->
<button type="button" class="btn">버튼 클릭</button>
</body>
</html>
개린이입니다...