備忘
setTimeoutはミリ秒後に関数を１回呼び出す
setTimeoutはミリ秒後に関数を繰り返し呼び出す
<!DOCTYPE html>
<html>
<head>
<script>
var timerId;
function timeoutStart(){
//タイマーの開始
timerId = setTimeout(whattime, 3000);
}
function timeoutStop(){
clearTimeout(timerId);
}
function intervalStart() {
clearInterval(timerId);
timerId = setInterval(whattime, 2000);
}
function intervalStop() {
cleartInterval(timerId);
}
function whattime() {
document.getElementById("info").textContent = new Date();
}
</script>
</head>
<body>
<button onclick="timeoutStart()">setTimeout</button>
<button onclick="timeoutStop()">clearTimeout</button>
<button onclick="intervalStart()">setInterval</button>
<button onclick="intervalStop()">clearInterval</button>
<p id="info"></p>
</body>
</html>
