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

When the app “boots up,” a request is sent to the backend to fetch the needed data. That might take some time, during which the user is not aware of what’s going on.

As the request is asynchronous, the user doesn’t even see a spinner in the browser tab. Therefore, it’s all the more important to display something while data is being fetched.

Showing errors is similar to showing progress. When something goes wrong in an app rendered on the backend, it is relatively easy to signal this to the user.

In the case of browser applications, the issue is more complex. An extensive error-handling strategy would handle errors depending on their severity and where they were produced. Here, we will focus on the errors that are thrown during the router’s transition to a destination route.


Note: You can download the same spinner image I use from https://s3-eu-west-1.amazonaws.com/rarwe-book/spinner.svg. After you have downloaded it, place it in the `public/images` folder of your application.

## Loading subroutes
Let's assume that the router transitions from the top all the way to `bands.band.songs`. For each route, it calls the route's `model` hook to resolve the data needed to render the template.

If the data returned in the model hook is not resolved immediately, Ember is designed to trigger a loading event on the route that is being entered. By default, the loading event will render a template named `loading` at the same level as the route itself.

An example is worth a thousand words, so suppose we are entering the `bands` route, which has the following model hook:

# Tuning

When the app “boots up,” a request is sent to the backend to fetch the needed data. That might take some time, during which the user is not aware of what’s going on.

As the request is asynchronous, the user doesn’t even see a spinner in the browser tab. Therefore, it’s all the more important to display something while data is being fetched.

Showing errors is similar to showing progress. When something goes wrong in an app rendered on the backend, it is relatively easy to signal this to the user.

In the case of browser applications, the issue is more complex. An extensive error-handling strategy would handle errors depending on their severity and where they were produced. Here, we will focus on the errors that are thrown during the router’s transition to a destination route.


Note: You can download the same spinner image I use from https://s3-eu-west-1.amazonaws.com/rarwe-book/spinner.svg. After you have downloaded it, place it in the `public/images` folder of your application.

# Loading subroutes
Let's assume that the router transitions from the top all the way to `bands.band.songs`. For each route, it calls the route's `model` hook to resolve the data needed to render the template.

If the data returned in the model hook is not resolved immediately, Ember is designed to trigger a loading event on the route that is being entered. By default, the loading event will render a template named `loading` at the same level as the route itself.

An example is worth a thousand words, so suppose we are entering the `bands` route, which has the following model hook:

Here, you’ll learn how to create and use loading templates in an Ember application.

Starting With Loading Subroutes

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

Starting With Loading Subroutes

Tuning