Function cb

src/index.js:217–229

(endResult)

      animations.forEach((animation, idx) => {
        var cb = function(endResult) {
          hasEnded[idx] = true;
          doneCount++;
          if (doneCount === animations.length) {
            doneCount = 0;
            callback && callback(endResult);
            return;
          }

          if (!endResult.finished && stopTogether) {
            result.stop();
          }
        };

        if (!animation) {
          cb({finished: true});