@web3auth/ws-embed/dist/lib.cjs/siteMetadata.js

Embed script

'use strict';

/**
 * Returns whether the given image URL exists
 * @param url - the url of the image
 * @returns whether the image exists
 */
function imgExists(url) {
  return new Promise((resolve, reject) => {
    try {
      const img = document.createElement("img");
      img.onload = () => resolve(true);
      img.onerror = () => resolve(false);
      img.src = url;
    } catch (e) {
      reject(e);
    }
  });
}
/**
 * Extracts a name for the site from the DOM
 */
const getSiteName = window => {
  const {
    document
  } = window;
  const siteName = document.querySelector('head > meta[property="og:site_name"]');
  if (siteName) {
    return siteName.content;
  }
  const metaTitle = document.querySelector('head > meta[name="title"]');
  if (metaTitle) {
    return metaTitle.content;
  }
  if (document.title && document.title.length > 0) {
    return document.title;
  }
  return window.location.hostname;
};
/**
 * Extracts an icon for the site from the DOM
 */
async function getSiteIcon(window) {
  try {
    const {
      document
    } = window;
    // Use the site's favicon if it exists
    let icon = document.querySelector('head > link[rel="shortcut icon"]');
    if (icon && (await imgExists(icon.href))) {
      return icon.href;
    }
    // Search through available icons in no particular order
    icon = Array.from(document.querySelectorAll('head > link[rel="icon"]')).find(_icon => Boolean(_icon.href));
    if (icon && (await imgExists(icon.href))) {
      return icon.href;
    }
    return "";
  } catch {
    return "";
  }
}
/**
 * Gets site metadata and returns it
 *
 */
const getSiteMetadata = async () => ({
  name: getSiteName(window),
  icon: await getSiteIcon(window)
});

module.exports = getSiteMetadata;