Function urlExists

mnist-transfer-cnn/loader.js:25–33

(url)

 * Test whether a given URL is retrievable.
 */
export async function urlExists(url) {
  ui.status('Testing url ' + url);
  try {
    const response = await fetch(url, {method: 'HEAD'});
    return response.ok;
  } catch (err) {
    return false;
  }
}

/**
 * Load pretrained model stored at a remote URL.