Execute a code when detecting livestream

API
2

Change the code to not use setInterval

If a call takes too long to run your calls collide with each other and you have more than one call running.

Also generally calling every 2 seconds is bad as the data will only change once a minuite.

So, the following is a potential fix

var executed = false;

function doThing() {
  $.ajax({
    type: 'GET',
    url: 'https://api.twitch.tv/helix/streams?user_login=username',
    dataType: 'json',
    headers: {
      'Client-Id': 'clientid',
      'Authorization': 'token'
    },
    success: function(channel) {
      if (channel.data.length == 0) {
        executed = false;
      } else {
        if (!executed) {
          //do stuff
          executed = true;
        }
      }
      // setup to check again in 15 seconds
      // and after this loop has finished processing.
      setTimeout(() => {
          doThing();
      }, 15000);
    }
  });
}

doThing();

So 15/30 seconds is better to space out your calls. And also deal with getting caching issues.

As

  • call one could see offline
  • call two sees online
  • call three sees offline (but you are really live)
  • call four sees online

Call three is in error due to caching by the API as you are hammering too quick

You may also be interested in EventSub instead http://dev.twitch.tv/docs/eventsub where Twitch will tell you when the stream goes live/offline rather than having to poll continually

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