playground:playground
差别
这里会显示出您选择的修订版和当前版本之间的差别。
| 两侧同时换到之前的修订记录前一修订版后一修订版 | 前一修订版 | ||
| playground:playground [2023/12/25 05:57] – [标题2] math | playground:playground [2024/01/28 11:00] (当前版本) – [标题 H1] 大王你怎么了 | ||
|---|---|---|---|
| 行 24: | 行 24: | ||
| $\frac{a}{b}\pm \frac{c}{d}= \frac{ad \pm bc}{bd} $ | $\frac{a}{b}\pm \frac{c}{d}= \frac{ad \pm bc}{bd} $ | ||
| + | |||
| + | $$\frac{a}{b}\pm \frac{c}{d}= \frac{ad \pm bc}{bd} $$ | ||
| ---- | ---- | ||
| 行 51: | 行 53: | ||
| ---- | ---- | ||
| + | < | ||
| + | < | ||
| + | <meta charset=" | ||
| + | <meta name=" | ||
| + | < | ||
| + | body { | ||
| + | font-family: | ||
| + | margin: 50px; | ||
| + | } | ||
| + | |||
| + | #countdown { | ||
| + | font-size: 24px; | ||
| + | margin-top: 20px; | ||
| + | } | ||
| + | </ | ||
| + | </ | ||
| + | < | ||
| + | |||
| + | < | ||
| + | |||
| + | <label for=" | ||
| + | <input type=" | ||
| + | <button onclick=" | ||
| + | |||
| + | <div id=" | ||
| + | |||
| + | < | ||
| + | let countdownInterval; | ||
| + | |||
| + | function startCountdown() { | ||
| + | // 清除之前的倒计时定时器 | ||
| + | clearInterval(countdownInterval); | ||
| + | |||
| + | // 获取用户输入的日期 | ||
| + | const birthdateInput = document.getElementById(' | ||
| + | const birthdate = new Date(birthdateInput.value); | ||
| + | |||
| + | // 更新倒计时显示 | ||
| + | updateCountdown(birthdate); | ||
| + | |||
| + | // 每秒更新一次倒计时 | ||
| + | countdownInterval = setInterval(() => { | ||
| + | updateCountdown(birthdate); | ||
| + | }, 1000); | ||
| + | } | ||
| + | |||
| + | function updateCountdown(birthdate) { | ||
| + | // 获取当前日期和时间 | ||
| + | const now = new Date(); | ||
| + | |||
| + | // 计算距离日期的秒数 | ||
| + | const timeDifference = Math.floor((birthdate - now) / 1000); | ||
| + | |||
| + | // 更新页面上的倒计时显示 | ||
| + | const countdownElement = document.getElementById(' | ||
| + | countdownElement.textContent = `人生还剩余 ${timeDifference} 秒`; | ||
| + | } | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| ====== 灌水 ====== | ====== 灌水 ====== | ||
playground/playground.1703455038.txt.gz · 最后更改: 2023/12/25 05:57 由 math