Function method3

scripts/insta_injectDownloadBtn.js:582–601

()

              // method 3
              async function method3() {
                let postId = await findPostId(articleNode);
                if (!postId) {
                  return null;
                }

                if (!(postId in mediaIdCache)) {
                  let postUrl = `https://www.instagram.com/p/${postId}/`;
                  let resp = await fetch(postUrl);
                  let text = await resp.text();
                  let idMatch = text ? text.match(mediaIdPattern) : [];
                  let mediaId = null;
                  for (let i = 0; i < idMatch.length; ++i) {
                    if (idMatch[i]) mediaId = idMatch[i];
                  }
                  if (!mediaId) return null;
                  mediaIdCache[postId] = mediaId;
                }
                return mediaIdCache[postId];
              }

              function method2() {
                let scriptJson = document.querySelectorAll(