fix(externalLinks): make external link warning work with subpaths

public/docs/release-notes.md

@@ -6,6 +6,7 @@
 
 - Added external link whitelist setting (`externalLinkWhitelist` in config.json or `CMD_EXTERNAL_LINK_WHITELIST`) to skip warning page for certain domains
 - Added external link warning setting (`externalLinkWarning` in config.json or `CMD_EXTERNAL_LINK_WARNING`) to disable the external link warning page entirely
+- Fixed external link warning for subpath instances
 - Enabled `.webp` for file uploads (for all backends but `imgur`, since it does not support it)
 
 ### Bugfixes

public/js/extra.js

@@ -624,7 +624,8 @@ export function rewriteExternalLinks (view) {
       return
     }
     const noteURL = window.location.pathname.split('/').pop()
-    anchor.attr('href', `${window.location.origin}/_link?url=${encodeURIComponent(parsed.href)}&note=${noteURL}`)
+    const urlPath = window.urlpath ? `/${window.urlpath}` : ''
+    anchor.attr('href', `${window.location.origin}${urlPath}/_link?url=${encodeURIComponent(parsed.href)}&note=${noteURL}`)
   })
 }
 window.rewriteExternalLinks = rewriteExternalLinks