<body> <input type="text"> <button>发送</button> </body> <script> var sent = document.querySelector('button'); var search = document.querySelector('input'); var time = 10; //10秒倒计时 sent.addEventListener('click', function () { sent.disabled = true; //禁用按钮 sent.innerHTML = '还剩' + time + '秒'; //消去一秒空白 var timer = setInterval(function () {//每秒执行 if (time === 1) { //停止重复 sent.innerHTML = '发送'; //恢复初始按钮状态 sent.disabled = false; //取消按钮禁用 time = 10; //回复秒数，供下次使用 clearInterval(timer); //停止计时 } else { time--; //秒数递减 sent.innerHTML = '还剩' + time + '秒'; //显示秒数 } }, 1000); }); </script>