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實例代碼( Tip: 登錄后體驗更佳 )
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body onafterprint="myFunction()">
<p>该实例演示了如何向 body 元素添加 "onafterprint" 事件。</p>
<h1>尝试打印文档</h1>
<p><b>提示:</b> 快捷键，如 Ctrl+P 可以设置页面打印。</p>
<p><b>注意:</b> 只有 Internet Explorer 和 Firefox 浏览器支持  onafterprint 事件。</p>
<p><b>注意:</b> 在 IE 中,  onafterprint 事件在打印对话框出现前触发，而不是之后。</p>
<script>
function myFunction() {
     alert("文档现在正在打印");
}
</script>
</body>
</html>
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運行結果