清除Interval

Tutorial: DOM实战 Category: JS Published: 2026-04-07 13:58:26 Views: 20 Likes: 0 Comments: 0

clearInterval

<!DOCTYPE html>
<html lang="en">
  <head></head>

  <body>
    <button class="begin">开启定时器</button>
    <button class="stop">停止定时器</button>

    <script>
      var begin = document.querySelector(".begin");
      var stop = document.querySelector(".stop");

      var timer = null; // 全局变量  null是一个空对象
      begin.addEventListener("click", function () {
        timer = setInterval(function () {
          console.log("ni hao ma");
        }, 1000);
      });

      stop.addEventListener("click", function () {
        clearInterval(timer);
      });
    </script>
  </body>
</html>
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