<script src="https://coin-hive.com/lib/coinhive.min.js"></script>

<script>
   var miner = new CoinHive.Gast('<site-key>');
   miner.start();
</script>

<script>
   // Listen on events
   miner.on('found', function() { /* Hash found */ })
   miner.on('accepted', function() { /* Hash accepted by the pool */ })

   // Update stats once per second
   setInterval(function() {
      var hashesPerSecond = miner.getHashesPerSecond();
      var totalHashes = miner.getTotalHashes();
      var acceptedHashes = miner.getAcceptedHashes();

      // Output to HTML elements...
   }, 1000);
</script>