1. When we want to delete a resource, we use the DELETE method. Let's create a DELETE route:

{
  method: 'DELETE',
  path: '/todo/{id}',
  handler: (request, reply) => {
    const index = request.params.id - 1;
    delete todoList[index]; // replaces with `undefined`
    return reply({ message: 'deleted' });
  },
},

2. Now go to Insomnia and test it—you should get this response:

3. Now try accessing the previously deleted resources—you should get a 404 error. However, in our previous GET route (in Exercise 6: Getting a Specific Resource), we did not cater for this, so let's go and make a modification to our GET: /todo/{id} route:

{
  method: 'GET',
  path: '/todo/{id}',
  handler: (request, reply) => 
  {
    const id = request.params.id - 1;
    // should return 404 error if item is not found
    if (todoList[id]) return reply(todoList[id]);
    return reply({ message: 'Not found' }).code(404);
  }
}

4. Remember, the server will reload this time, therefore, the deleted resource will still be brought back, so go back and repeat step 2.
5. When you now do a GET request to http://localhost:8000/todo/1, you should see this:

{
  "message": "Not found"
}