objectFitPolyfill = function(media) {
    if (typeof media === 'undefined' || media instanceof Event) {
      // If left blank, or a default event, all media on the page will be polyfilled.
      media = document.querySelectorAll('[data-object-fit]');
    } else if (media && media.nodeName) {
      // If it's a single node, wrap it in an array so it works.
      media = [media];
    } else if (typeof media === 'object' && media.length && media[0].nodeName) {
      // If it's an array of DOM nodes (e.g. a jQuery selector), it's fine as-is.
      media = media;
    } else {
      // Otherwise, if it's invalid or an incorrect type, return false to let people know.
      return false;
    }

    for (var i = 0; i < media.length; i++) {
      if (!media[i].nodeName) continue;

      var mediaType = media[i].nodeName.toLowerCase();

      if (mediaType === 'img') {
        if (edgePartialSupport) continue; // Edge supports object-fit for images (but nothing else), so no need to polyfill

        if (media[i].complete) {
          objectFit(media[i]);
        } else {
          media[i].addEventListener('load', function() {
            objectFit(this);
          });
        }
      } else if (mediaType === 'video') {
        if (media[i].readyState > 0) {
          objectFit(media[i]);
        } else {
          media[i].addEventListener('loadedmetadata', function() {
            objectFit(this);
          });
        }
      } else {
        objectFit(media[i]);
      }
    }

    return true;
  }
Initialize plugin

@param {node} media - Optional specific DOM node(s) to be polyfilled