Simplify it a bit more by having POST return the todo list again.

controllers/todo_alpine.js

@@ -25,8 +25,7 @@ export class Todo {
       await ToDo.insert({task: req.body.task});
     }
 
-    // this is how you can prevent the annoying double submit
-    rep.code(200).send({message: "OK"});
+    await this.get(req, rep);
   }
 }
 

templates/todo_alpine.html

@@ -6,8 +6,7 @@
 <script>
   const new_task = async (todos, task) => {
     // zero error handling but fine for now
-    await axios.post("/todo_alpine", {task});
-    return (await axios.get('/todo_alpine')).data;
+    return (await axios.post("/todo_alpine", {task})).data;
   }
 </script>