영상
개념
<!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>Document</title>
</head>
<!--
[개념] clearInterval() 메서드
(1) setInterval() 메서드에서 반환된 ID를 저장한다.
(2) clearInterval(ID명)
(3) 설정된 타이머를 지운다.
-->
<body onload="changeColor()">
<div id="target">
<p>This is a Text.</p>
</div>
<button onclick="stopTextColor()">중지</button>
<script>
let id = null;
function changeColor() {
id = setInterval(flashText, 500); // 0.5초 간격으로 호출
}
function flashText() {
let elem = document.getElementById("target");
elem.style.color = (elem.style.color == "red") ? "blue" : "red";
elem.style.backgroundColor =
(elem.style.backgroundColor == "green") ? "yellow" : "green";
}
/*
color => red, blue
backgroundColor => green, yellow
*/
function stopTextColor() {
clearInterval(id);
}
</script>
</body>
</html>
Java
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