rarwe.tar.gz

Ember

Ember-copy

ember2

embercss

rarwe

Ember-copy-5yvdqv

Ember-copy-5yvdqv-copy

Ember-Acceptest

Ember-Acceptest-copy

Ember-unitest

rarwe-copy

Ember-Acceptest-challenge

Ember-helper-challenge

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
Our next mission is to make the list of bands reactive. Creating a new band should update the list of bands in the sidebar.

# Services: useful singletons
In the [Controllers](https://www.educative.io/collection/page/10370001/4603037207756800/5900480100696064) chapter, you learned that controllers are singletons. It was more of a hindrance than a feature because controllers are closely bound to UI state, and most of the time, you want UI state to be cleared when you move away from the page that piece of UI is rendered on.

There are other kinds of states in most, non-trivial applications. For example, you might want to retain data as you move between pages of your application, which is not related to your domain models. We can call this an application state. A typical example is maintaining a session that holds the current user.

As in most situations, the framework has us covered. Services are baked into the framework for this exact reason.

The current task at hand, storing existing bands and songs, seems like a fitting use case. If we had a store that can hold our bands and songs and defined methods on the store for access, we’d be able to overcome the problem of the model hooks being too rigid.

# Building a store... I mean, a catalog

The first step is to create the store service. For reasons revealed later, we'll choose a different name for our service and we'll call it "catalog." Our catalog will hold the bands and songs we create in the application. 

We can generate a service with Ember-CLI using the following command:

```shell
ember g service catalog
```

>**Note**: We have already created the service mentioned above. You can type this command in the terminal widget below, and you can also try creating services with different names.

In this lesson, we’ll cover store services and how to create them.

Creating a Service