diff --git a/src/utils/Github-Link.ts b/src/utils/Github-Link.ts
index 8f0f226..bed1535 100644
--- a/src/utils/Github-Link.ts
+++ b/src/utils/Github-Link.ts
@@ -8,12 +8,7 @@ export const githubPagesUrlRe =
 export type GithubRepoUrl = `https://www.github.com/${string}/${string}`;
 export type GithubPagesUrl = `https://${string}.github.io/${string}`;
 
-/**
- * Get the source URL of a Github Pages page.
- * @param throwErrorOnMismatch - If true, throw an error if URL can't
- * be parsed. Otherwise, null will be returned.
- * @returns A URL
- */
+
 export function getGithubUrlFromGithubPages(
   throwErrorOnMismatch: true,
   githubPagesUrl?: GithubPagesUrl,
@@ -22,12 +17,20 @@ export function getGithubUrlFromGithubPages(
   throwErrorOnMismatch?: false,
   githubPagesUrl?: GithubPagesUrl,
 ): GithubRepoUrl | null;
+/**
+ * Get the source URL of a Github Pages page.
+ * @param throwErrorOnMismatch - If true, throw an error if URL can't
+ * @param githubPagesUrl - Specify the GitHub Pages URL if you don't
+ * want to use the default of location.href.
+ * be parsed. Otherwise, null will be returned.
+ * @returns A URL
+ */
 export function getGithubUrlFromGithubPages(
   throwErrorOnMismatch?: boolean,
   githubPagesUrl?: GithubPagesUrl,
 ) {
   const currentUrl = githubPagesUrl ?? location.href;
-  const match = currentUrl.match(githubPagesUrlRe);
+  const match = githubPagesUrlRe.exec(currentUrl);
   if (!match) {
     if (throwErrorOnMismatch) {
       throw new Error("Could not parse source URL from this page");
@@ -52,7 +55,7 @@ export function createGithubLink(
   const a = document.createElement("a");
   // a.append(githubSvg);
   a.textContent = "Source code";
-  a.href = getGithubUrlFromGithubPages() || fallbackUrl;
+  a.href = getGithubUrlFromGithubPages() ?? fallbackUrl;
   a.target = "_blank";
   return a;
 }