Allow other modifier keys to submit the form

templates/index.html

@@ -53,7 +53,7 @@
         onInput();
 
         document.body.addEventListener('keydown', (e) => {
-            if (e.keyCode === 13 && e.metaKey) {
+            if (e.key === 'Enter' && (e.metaKey || e.ctrlKey || e.altKey)) {
                 form.submit();
             }
         });