What is the use of Backbone.js router?

Backbone.js routers are used to route the application’s URL to some particular actions and events. At least one route must be present for every defined router. It also defines the URL representation of the application’s object when web applications provide linkable, bookmarkable, and sharable URL.

In an interview setting, the correct answer to the question “What is the use of Backbone.js router?” would be:

The Backbone.js router is a core component of Backbone.js that provides routing functionality in single-page applications (SPAs). Its primary purpose is to manage the application’s URL state and respond to changes in the URL by executing the appropriate functions or methods defined in the application. This enables developers to create rich, interactive user experiences without the need for page refreshes.

The Backbone.js router works by defining routes, which are patterns that map to specific actions or functions within the application. When a user navigates to a URL that matches one of these routes, the corresponding function is triggered, allowing developers to update the application’s state, render new views, or perform other necessary actions.

Overall, the Backbone.js router facilitates the creation of SPAs by providing a clean and organized way to handle URL routing and navigation within the application.