<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<button>点击停止定时器</button>
<script>
var btn = document.querySelector(\'button\');
var timer = setTimeout(function() {
console.log(\'爆炸了\');
}, 5000);
btn.addEventListener(\'click\', function() {
clearTimeout(timer);
})
</script>
</body>
</html>