Twitter Followers

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css" integrity="sha512-1PKOgIY59xJ8Co8+NE6FZ+LOAZKjy+KY8iq0G4B3CyeY6wYHN3yt9PW0XpSriVlkMXe40PTKnXrLnZ9+fkDaog==" crossorigin="anonymous" />
    <link rel="stylesheet" href="style.css" />
    <title>Increment Counter</title>
  </head>
  <body>
    <div class="counter-container">
      <i class="fab fa-twitter fa-3x"></i>
      <!-- HTML5允许开发者自由为其标签添加属性，这种自定义属性一般用“data-”开头
      这种自定义属性主要有两种作用：在CSS中作标签选择器,用来传递替换文本 -->
      <div class="counter" data-target="12000"></div>
      <span>Twitter Followers</span>
    </div>

    <div class="counter-container">
      <i class="fab fa-youtube fa-3x"></i>
      <div class="counter" data-target="5000"></div>
      <span>YouTube Subscribers</span>
    </div>

    <div class="counter-container">
      <i class="fab fa-facebook fa-3x"></i>
      <div class="counter" data-target="7500"></div>
      <span>Facebook Fans</span>
    </div>
    <script src="script.js"></script>
  </body>
</html>

@import url('https://fonts.googleapis.com/css?family=Roboto+Mono&display=swap');

* {
    
    
  box-sizing: border-box;
}

body {
    
    
  background-color: #8e44ad;
  color: #fff;
  font-family: 'Roboto Mono', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.counter-container {
    
    
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  margin: 30px 50px;
}

.counter {
    
    
  font-size: 60px;
  margin-top: 10px;
}

/* @media 可以指定一个媒体查询和一个 CSS 块，当且仅当该媒体查询与正在使用其内容的设备匹配时，该 CSS 块才能应用于该文档 */
@media (max-width: 580px) {
    
    
  body {
    
    
    flex-direction: column;
  }
}

const counters = document.querySelectorAll('.counter')

counters.forEach(counter => {
    
    

    counter.innerText = '0'

    const updateCounter = () => {
    
    
        const target = +counter.getAttribute('data-target')
        const c = +counter.innerText

        const increment = target / 200

        if(c < target) {
    
    
            // Math.ceil() 函数返回大于或等于一个给定数字的最小整数
            counter.innerText = `${
      
      Math.ceil(c + increment)}`
            setTimeout(updateCounter, 1)
        } else {
    
    
            counter.innerText = target
        }
    }

    updateCounter()
})

猜你喜欢