Function assertHttpsUrl

src/url.js:311–332

(
  urlString,
  elementContext,
  sourceName = 'source'
)

 * @return {string}
 */
export function assertHttpsUrl(
  urlString,
  elementContext,
  sourceName = 'source'
) {
  userAssert(
    urlString != null,
    '%s %s must be available',
    elementContext,
    sourceName
  );
  userAssert(
    isSecureUrlDeprecated(urlString) || /^\/\//.test(urlString),
    '%s %s must start with ' +
      '"https://" or "//" or be relative and served from ' +
      'either https or from localhost. Invalid value: %s',
    elementContext,
    sourceName,
    urlString
  );
  return urlString;
}

/**
 * Asserts that a given url is an absolute HTTP or HTTPS URL.