21 - Geolocation/index-START.html

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  <h1 class="speed">
    <span class="speed-value">0</span>
    <span class="units">KM/H</span>
  </h1>

  <style>
    html {
      font-size: 100px;
    }
    body {
      font-family: sans-serif;
      min-height:100vh;
      display:flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      background:
        radial-gradient(black 15%, transparent 16%) 0 0,
        radial-gradient(black 15%, transparent 16%) 8px 8px,
        radial-gradient(rgba(255,255,255,.1) 15%, transparent 20%) 0 1px,
        radial-gradient(rgba(255,255,255,.1) 15%, transparent 20%) 8px 9px;
      background-color:#282828;
      background-size:16px 16px;
      background-position: fixed;
    }

    .arrow {
      width:250px;
      overflow: hidden;
      transition: all 0.2s;
      transform:rotate(0deg);
      display: inline-block;
    }

    h1 {
      color:white;
      font-weight: 100;
      font-size: 60px;
      display:flex;
      align-items: center;
    }

    .units {
      font-size: 15px;
    }
    /*Compass: https://thenounproject.com/search/?q=compass&i=592352*/
  </style>
  <script>
    const arrow = document.querySelector('.arrow');
    const speed = document.querySelector('.speed-value');

    navigator.geolocation.watchPosition((data) => {
      console.log(data);
      speed.textContent = data.coords.speed;
      arrow.style.transform = `rotate(${data.coords.heading}deg)`;
    }, (err) => {
      console.err(err);
      alert('HEY! YOU GOTTA ALLOW THAT TO HAPPEN!!!');
    });

  </script>
</body>
</html>