zksync-sso/src/utils/helpers.ts

ZKsync Smart Sign On SDK

export function getWebsiteName(): string | null {
  const fullTitle = document.title;
  if (!fullTitle) return null;

  const delimiters = [" - ", " | ", " : ", " · ", " — "];

  // Find the first delimiter that splits the title
  for (const delimiter of delimiters) {
    const parts = fullTitle.split(delimiter);
    if (parts.length > 1) {
      return parts[0]!.trim();
    }
  }

  return fullTitle.trim();
}

export function getFavicon(): string | null {
  const el = document.querySelector(
    "link[sizes=\"192x192\"], link[sizes=\"180x180\"], link[rel=\"icon\"], link[rel=\"shortcut icon\"]",
  );
  const href = el?.getAttribute("href");
  if (!href) return null;

  try {
    const url = new URL(href, document.location.href);
    // Make sure no malicious URLs are returned like "javascript:..."
    if (url.protocol !== "https:" && url.protocol !== "http:") {
      return null;
    }
    return url.href;
  } catch {
    return null;
  }
}

export function noThrow<T>(fn: () => T): T | null {
  try {
    return fn();
  } catch {
    return null;
  }
}