Book Image

Mastering Backbone.js

By : Abiee Echamea, Abiee Echamea
Book Image

Mastering Backbone.js

By: Abiee Echamea, Abiee Echamea

Overview of this book

Backbone.js is a popular library to build single page applications used by many start-ups around the world because of its flexibility, robustness and simplicity. It allows you to bring your own tools and libraries to make amazing webapps with your own rules. However, due to its flexibility it is not always easy to create scalable applications with it. By learning the best practices and project organization you will be able to create maintainable and scalable web applications with Backbone.js. With this book you will start right from organizing your Backbone.js application to learn where to put each module and how to wire them. From organizing your code in a logical and physical way, you will go on to delimit view responsibilities and work with complex layouts. Synchronizing models in a two-way binding can be difficult and with sub resources attached it can be even worse. The next chapter will explain strategies for how to deal with these models. The following chapters will help you to manage module dependencies on your projects, explore strategies to upload files to a RESTful API and store information directly in the browser for using it with Backbone.js. After testing your application, you are ready to deploy it to your production environment. The final chapter will cover different flavors of authorization. The Backbone.js library can be difficult to master, but in this book you will get the necessary skill set to create applications with it, and you will be able to use any other library you want in your stack.
Table of Contents (17 chapters)
Mastering Backbone.js
About the Author
About the Reviewers

Validating model data

Usually, on frontend applications, the inputs are validated with UI plugins such as jQuery Validation, which focuses on the user interface. In other words, the data is validated directly on the DOM. However, on bigger applications that would not be the best approach.

Validations in Backbone can be done manually or through plugins. Of course, the best approach is to use a plugin because it saves time and effort, but before we learn how to use the backbone.validation plugin, I want to show you how native validation works.

Manual validation

Backbone models have three properties to help us validate the model data: validate(), validationError(), and isValid(). The validate()method should return nothing if the model data is correct, or a value otherwise.

Backbone leaves open what should be returned by the validate() method, so you can return just a plain string message or a complex object:

class Chapter extends Backbone.Model{
  validate(attrs, options) {
    if (attrs.end &lt...