main02.js

// After the first JSON is returned, we are going to convert the URL string by mapping over the array of objects and replacing the default cover image size.
.then( data => {
  data.media.map( media => {
    if(media.covers[0]){
      // Replace the cover image size with "original" image size.
      media.covers[0] = media.covers[0].replace('R320x240', 'original');

      // Add the item to the jsonPost array.
      jsonData = [...jsonData, media];
    } else {

      // Add the item to the jsonPost array.
      jsonData = [...jsonData, media];
    }
  });
})