HTML onoffline 事件属性

htmlweb developmentfront end technologydom更新于 2025/12/27 2:20:17

HTML onoffline 事件属性在浏览器开始离线工作时触发。

语法

以下是语法 −

<tagname onoffline=”script”></tagname>

让我们看一个 HTML onoffline 事件属性的示例−

示例

<!DOCTYPE html>
<html>
<style>
   body {
      color: #000;
      height: 100vh;
      background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) no-repeat;
      text-align: center;
   }
   .show {
      font-size: 1.2rem;
      color: #fff;
   }
</style>
<body ononline="onlineFn()" onoffline="offlineFn()">
<h1>HTML onoffline/ononline Event Attribute Demo</h1>
<p style="color:#db133a;">Try to disable/enable your network.</p>
<div class="show"></div>
<script>
   function onlineFn() {
      alert("Hey! You are online");
   }
   function offlineFn() {
      alert("Hey! You are offline");
   }
</script>
</body>
</html>