Function isJSONContent

lib/common.js:113–117

* @param {Headers} headers

(headers)

 * @param {Headers} headers
 */
function isJSONContent(headers) {
  // https://tools.ietf.org/html/rfc8259
  const contentType = String(headers.get('content-type') || '').toLowerCase()
  return contentType.startsWith('application/json')
}

/**
 * Return a new object with all field names of the headers lower-cased.