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<!DOCTYPE html> <html> <body> <h1>Window 对象</h1> <h2>setTimeout() 方法</h2> <p>点击此按钮打开新窗口，三秒（3000毫秒）后关闭该窗口。</p> <button onclick="openWin()">打开 "myWindow"</button> <script> function openWin() { const myWindow = window.open("", "", "width=200, height=100"); setTimeout(function() {myWindow.close()}, 3000); } </script> </body> </html>