rarwe.tar.gz

Ember

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ember2

embercss

rarwe

Ember-copy-5yvdqv

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Ember-Acceptest

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Ember-unitest

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In this course, you begin with an introduction to Ember.js, a JavaScript framework for building client-side applications.

After that, the course guides you through the steps of building a real application so that you can see how the concepts are applied in practice. You'll learn about the building blocks of Ember one by one, in a way that crushes the allegedly steep learning curve of the framework.

The application will get shinier (and/or more robust) with each chapter. By the end, we will have a decent app, and you'll have a great new skill you can add to your resume.

Developing Robust Ember.js Applications

## Tuning

It’s not a coincidence that this is the third chapter about routing. Ember’s routing mechanism is very powerful, and you can wield it as a weapon against different types of challenges that come your way if you know its ins and outs.

In this chapter, we’ll improve our app in a few different ways and use some routing concepts to achieve it. First, let’s discuss route hooks and actions some more.

## Route hooks
In the [Nested routes](https://www.educative.io/collection/page/10370001/4603037207756800/4526561804419072) chapter, you saw how the router traverses each route level when transitioning to the destination route. It was a simplified model since it only mentioned the `model` hook being called for each route. The truth is somewhat more complex. It's not only the `model` hook but several model hooks that are called in succession.

The first one is `beforeModel`. Since it gets called before the resolved model is known, the only parameter it receives is the current route transition:

>beforeModel(transition) {...}

Next up is the familiar `model` hook. In addition to the transition, it also receives the params from the URL, which are parsed according to the routing tree:

>model(params, transition) {...}

Once the model is resolved, the `afterModel` hook is called with the model and the transition object:

>afterModel(model, transition) {...}

So, at each level of a route transition, the `beforeModel`, `model`, and `afterModel` hooks are called for the particular route, with one exception that we are going to cover later. When these have all run for all levels of the transition, the transition is considered validated. It is only then that the next hook, called `setupController`, is entered:

>setupController(controller, model, transition) {...}

We briefly discussed and used the `setupController` hook in the Controllers chapter. As its title suggests, its main job is to set up the controller belonging to the route. The default implementation sets the controller's `model` property to the model that was previously resolved. If this is the desired behaviour, we do not need to use the `setupController` hook.

The following graph helps us visualize how the router calls each model hook for each route:

# Tuning

It’s not a coincidence that this is the third chapter about routing. Ember’s routing mechanism is very powerful, and you can wield it as a weapon against different types of challenges that come your way if you know its ins and outs.

In this chapter, we’ll improve our app in a few different ways and use some routing concepts to achieve it. First, let’s discuss route hooks and actions some more.

# Route hooks
In the [Nested routes](https://www.educative.io/collection/page/10370001/4603037207756800/4526561804419072) chapter, you saw how the router traverses each route level when transitioning to the destination route. It was a simplified model since it only mentioned the `model` hook being called for each route. The truth is somewhat more complex. It's not only the `model` hook but several model hooks that are called in succession.

The first one is `beforeModel`. Since it gets called before the resolved model is known, the only parameter it receives is the current route transition:

>beforeModel(transition) {...}

Next up is the familiar `model` hook. In addition to the transition, it also receives the params from the URL, which are parsed according to the routing tree:

>model(params, transition) {...}

Once the model is resolved, the `afterModel` hook is called with the model and the transition object:

>afterModel(model, transition) {...}

So, at each level of a route transition, the `beforeModel`, `model`, and `afterModel` hooks are called for the particular route, with one exception that we are going to cover later. When these have all run for all levels of the transition, the transition is considered validated. It is only then that the next hook, called `setupController`, is entered:

>setupController(controller, model, transition) {...}

We briefly discussed and used the `setupController` hook in the Controllers chapter. As its title suggests, its main job is to set up the controller belonging to the route. The default implementation sets the controller's `model` property to the model that was previously resolved. If this is the desired behaviour, we do not need to use the `setupController` hook.

The following graph helps us visualize how the router calls each model hook for each route:

In this lesson, you’ll learn about route hooks and route events in Ember.js.

Router Hooks and Events

Course Overview

Getting Started with Ember

Templates and Data Bindings

Routing

Nested Routes

Components

Controllers

Building a Catalog

Talking to a Backend

Advanced Routing

Testing

Query Params

Loading and Error Substates

Helpers

Conclusion

Appendix

Router Hooks and Events

Tuning

Route hooks