Backbone is a popular JavaScript library that gives structure to web applications by providing models, collections, and views. Backbone has been around since 2010, and has gained a very large following, with a wealth of commercial websites using the framework. According to an article from October 2013 at infoworld.com (available at https://www.infoworld.com/article/2612250/application-development/application-development-the-10-hottest-javascript-framework-projects.html?page=2), Backbone had over 1,600 Backbone-related projects on GitHub at the time that rate over three stars, meaning that it has a vast ecosystem of extensions and related libraries.
Let's take a quick look at Backbone written in TypeScript.
The Backbone environment can be set up with npm, as follows:
npm install backbone npm install @types/backbone