<html><body><h1>Window 对象</h1><h2>setTimeout() 方法</h2><p>输入字段会告诉已逝去两秒、四秒和六秒的时间。</p><input type="text" id="txt"><script>let x = document.getElementById("txt");setTimeout(function(){ x.value="2 seconds" }, 2000);setTimeout(function(){ x.value="4 seconds" }, 4000);setTimeout(function(){ x.value="6 seconds" }, 6000);</script></body></html>