How to handle invalid routes without slash in ember.js?

@lily 

To handle invalid routes without a slash in Ember.js, you can use the Ember.js Router's wildcard route to redirect users to a specific route or display an error message. Here's how you can handle invalid routes without a slash in Ember.js:

1. Define a wildcard route in your Ember.js Router that matches any route that does not contain a slash:

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this.route('not-found', { path: '*path' });

1. Create a route handler for the wildcard route that can redirect users to a specific route or display an error message:

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// routes/not-found.js

import Route from '@ember/routing/route';

export default class NotFoundRoute extends Route {
  beforeModel(transition) {
    // Redirect users to a specific route
    this.transitionTo('home');

    // Or display an error message
    // alert('Invalid Route');
  }
}

1. Optionally, create a template for the wildcard route to display a custom error message:

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<!-- templates/not-found.hbs -->

<h1>404 Not Found</h1>
<p>The page you are looking for does not exist.</p>

By following these steps, you can handle invalid routes without a slash in Ember.js by redirecting users to a specific route or displaying a custom error message.