第211练最终效果：
练习的最终代码：
HTML:
<!DOCTYPE html><html lang=”en”><head><meta charset=”UTF-8″><meta http-equiv=”X-UA-Compatible” content=”IE=edge”><meta name=”viewport” content=”width=device-width, initial-scale=1.0″><title>211练-番茄计时器</title><link rel=”stylesheet” href=”index.css”></head><body><div class=”container”><h1 class=”title”>番茄计时器</h1><p class=”timer” id=”timer”>25:00</p><div class=”button-wrapper”><button id=”start”>开始</button><button id=”stop”>停止</button><button id=”reset”>重置</button></div></div><script src=”index.js”></script></body></html>
CSS:
.container {margin: 0 auto;max-width: 400px;text-align: center;padding: 20px;font-family: “Roboto”, sans-serif;}.title {font-size: 36px;margin-bottom: 10px;color: #2c3e50;}.timer {font-size: 72px;color: #2c3e50;}button {font-size: 18px;padding: 10px 20px;margin: 10px;color: white;border: none;border-radius: 4px;cursor: pointer;text-transform: uppercase;transition: opacity 0.3s ease-in-out;}button:hover {opacity: 0.7;}#start {background-color: #27ae60;}#stop {background-color: #c0392b;}#reset {background-color: #7f8c8d;}
JS:
const startEl = document.getElementById(“start”);const stopEl = document.getElementById(“stop”);const resetEl = document.getElementById(“reset”);const timerEl = document.getElementById(“timer”);let interval;let timeLeft = 1500;function updateTimer() {let minutes = Math.floor(timeLeft / 60);let seconds = timeLeft % 60;let formattedTime = `${minutes.toString().padStart(2, “0”)}:${seconds.toString().padStart(2, “0”)}`;timerEl.innerHTML = formattedTime;}function startTimer() {interval = setInterval(() => {timeLeft–;updateTimer();if (timeLeft === 0) {clearInterval(interval);alert(“Time’s up!”);timeLeft = 1500;updateTimer();}}, 1000);}function stopTimer() {clearInterval(interval);}function resetTimer() {clearInterval(interval);timeLeft = 1500;updateTimer();}startEl.addEventListener(“click”, startTimer);stopEl.addEventListener(“click”, stopTimer);resetEl.addEventListener(“click”, resetTimer);
© 版权声明
文章版权归作者所有，未经允许请勿转载。
相关文章
暂无评论...
【web前端开发】一个专业而懂你的前端开发技术研究学习交流平台，每天不定时分享前端技术内容与案例，编程图书与课程，前端开发工具等学习资源，我们坚持每天学习一点点，每天进步一点点，关注我们，一起学习成长进步。
同名公众号【web前端开发】
