Don't flash the 404 page when using it for redirects (#46)

Author: robertbastian

src/content/docs/404.mdx

@@ -9,18 +9,23 @@ hero:
 
 import { latest_dir_name } from '../../../astro.config.mjs';
 
+<style>{`.hero { display: none; }`}</style>
+
 <script>{`
 window.onload = function () {
   const latest_dir_name = '${ latest_dir_name }';
   const path = window.location.pathname;
   // redirect /latest to the latest version
   if (path.startsWith('/latest')) {
       window.location.replace('/' + latest_dir_name + '/' + path.slice(path.length == 7 ? 7 : 8))
+      return;
   }
   // redirect a semver (/2.0.1) to a directory name (/2_0)
   let parts = path.match(/^\\/(?<major>[0-9]+)\\.(?<minor>[0-9])+\\.[0-9]+(?<rest>\\/.*)?$/)?.groups;
   if (parts) {
-      window.location.replace('/' + parts['major'] + '_' + parts['minor'] + (parts['rest'] || ''))
+      window.location.replace('/' + parts['major'] + '_' + parts['minor'] + (parts['rest'] || ''));
+      return;
   }
+  document.getElementsByClassName('hero')[0].style = "display: inherit;";
 };
 `}</script>