Throttle calling a provided function on every element in the calling array.

throttleRequests.js

function throttle(set, limit, threshold, callback) {
      let timer = 0;
      window.setInterval(() => {
        timer++;
      }, threshold);
      let i = 0;
      let requestChunk = timer;
      let requestsSent = 0;
      while (i < set.length) {
        // requests within limit
        if (requestChunk === timer && requestsSent < limit) {
          callback(set[i]);
          requestsSent++;
          i++;
        } else if (requestChunk === timer && requestsSent >= limit) {
          // request outside of limit
          console.log('outside limit');
          requestChunk = timer;
          requestsSent = 0;
        }
        if (requestChunk !== timer) {
          // chunk reset
          console.log('next chunk');
          requestChunk = timer;
          requestsSent = 0;
        }
      }
    }