Keeping track of time

Inspect the current playhead and the ranges that describe media playback.

Tip: open your browser's developer console and use the player and THEOplayer variables to interact with this demo.

Current time	0:00.0
Duration	0:00.0
Paused	Yes

Played

Buffered

Seekable

TimeRanges can contain zero or more intervals. Listen for playback and buffering events to keep a readout current. See the TimeRanges API.

function updateRanges() {
  console.log(player.currentTime, player.duration, player.played, player.buffered, player.seekable);
}

player.addEventListener(['timeupdate', 'progress', 'durationchange', 'seeking', 'seeked', 'play', 'pause'], updateRanges);

Code

demo.html

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Keeping track of time</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover" />
    <link rel="preconnect" href="https://fonts.googleapis.com" />
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
    <link href="https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wght@0,400;0,700;1,400;1,700&display=swap" rel="stylesheet" />
    <style>
      html,
      body {
        margin: 0;
        padding: 0;
      }

      theoplayer-default-ui:not(:defined) {
        display: inline-block;
        box-sizing: border-box;
      }

      theoplayer-default-ui {
        width: 100%;
        aspect-ratio: 16 / 9;
        font-family: 'Noto Sans', sans-serif;
        background: #000;
      }
    </style>
    <script src="https://cdn.theoplayer.com/dash/theoplayer/THEOplayer.js"></script>
    <script nomodule src="https://unpkg.com/@theoplayer/web-ui@2/polyfills"></script>
    <script async src="https://unpkg.com/@theoplayer/web-ui@2"></script>
  </head>
  <body>
    <!--
      libraryLocation: For demonstration purposes, we use the THEOplayer CDN.
      For production use, host the library yourself and update this URL and the script above.

      licenseUrl: Point this to your license file, or replace it with a license property.
    -->
    <theoplayer-default-ui
      configuration='{"libraryLocation":"https://cdn.theoplayer.com/dash/theoplayer/","licenseUrl":"../../../../theoplayer-license.txt"}'
      source='{"sources":{"src":"https://cdn.theoplayer.com/video/big_buck_bunny/big_buck_bunny_metadata.m3u8","type":"application/x-mpegurl"},"poster":"https://cdn.theoplayer.com/video/big_buck_bunny/poster.jpg","metadata":{"title":"Big Buck Bunny"}}'
    ></theoplayer-default-ui>
    <script src="../utils.js"></script>
    <script>
      onPlayerReady((player) => {
        function ranges(timeRanges) {
          const result = [];
          for (let index = 0; index < timeRanges.length; index += 1) {
            result.push({ start: timeRanges.start(index), end: timeRanges.end(index) });
          }
          return result;
        }

        function report() {
          sendToParent('time-ranges', {
            currentTime: player.currentTime,
            duration: player.duration,
            paused: player.paused,
            played: ranges(player.played),
            buffered: ranges(player.buffered),
            seekable: ranges(player.seekable),
          });
        }

        player.addEventListener(['timeupdate', 'progress', 'durationchange', 'seeking', 'seeked', 'play', 'pause'], report);
        report();
      });
    </script>
  </body>
</html>