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

In the [Components](https://www.educative.io/collection/page/10370001/4603037207756800/5135106379874304) chapter we got away with defining the event handler for DOM events inline using the `set` helper. Here, however, we'll need to define the actions ourselves.

Currently, since we haven't written the actions, we get the following error:

>**Assertion failed:** You must pass a function as the second argument to the `on` modifier.

The error is due to the fact that `this.updateTitle`, `this.saveSong`, and `this.cancel` are all undefined. Therefore, we have to define them in the template’s context. Remember what that context is? Yep, the controller.

## Actions
Let's open the controller file and define these new event handlers:

In the [Components](https://www.educative.io/collection/page/10370001/4603037207756800/5135106379874304) chapter we got away with defining the event handler for DOM events inline using the `set` helper. Here, however, we'll need to define the actions ourselves.

Currently, since we haven't written the actions, we get the following error:

>**Assertion failed:** You must pass a function as the second argument to the `on` modifier.

The error is due to the fact that `this.updateTitle`, `this.saveSong`, and `this.cancel` are all undefined. Therefore, we have to define them in the template’s context. Remember what that context is? Yep, the controller.

# Actions
Let's open the controller file and define these new event handlers:

In this lesson, you’ll learn how to define and use event handlers in an Ember application.

Event Handlers

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

Event Handlers