Why 'active' is not decreased? How to force the callback? about d3-queue HOT 2 CLOSED

If only the first task is being executed, it’s probably because you are forgetting to invoke the callback when your task completes. A functional example:

var q = queue(1);

for (var i = 0; i < 10; ++i) {
  q.defer(function(callback) {
    setTimeout(function() {
      console.log("task running…");
      callback(null, Math.random());
    }, 50);
  });
}

q.awaitAll(function(error, results) {
  if (error) throw error;
  console.log(results);
});

from d3-queue.

Thanks a lot. I already solved the problem the same way when I closed the issue. The problem in my case was related to the nature of the task. In fact each task in my case was calling a function passing an object as argument holding another function to be executed with its parameters as a callback of a successful async ajax request. So having this chain of calls I didn't understand why I had to put explicitely a callback for the task, since I had no other need to return the result (uhm... actually now I'm returning a 'fake' result) of the last function of the chain back to the calling task. Anyway, thanks again for your help. Now it is working.

from d3-queue.