Function elByTag

src/background/sync/s3.js:120–123

(parent, tag)

    return r.length ? r : [...parent.getElementsByTagName(tag)];
  }
  function elByTag(parent, tag) {
    return parent.getElementsByTagNameNS(ns, tag)[0]
      || parent.getElementsByTagName(tag)[0];
  }

  const items = elsByTag(doc, 'Contents').map((el) => {
    const key = elByTag(el, 'Key')?.textContent || '';