Web Technologies Used by fitbit.com

Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS- and JavaScript-based design templates for typography, forms, buttons, navigation and other interface components.

Google Tag Manager is a free tool from Google that enables users to easily add, update, and manage website tags. Tags are snippets of code that allow websites to track activity, such as page visits and clicks, in order to better understand user behavior. Google Tag Manager makes it easy to quickly and easily add, update, and manage website tags without having to manually update code. It also helps to ensure that tags are firing correctly and accurately tracking user activity.

Java is a general-purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible.

Klarna Checkout is a complete payment solution where Klarna handles a store's entire checkout.

Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.

Modernizr is a JavaScript library which is designed to detect HTML5 and CSS3 features in various browsers, which lets JavaScript avoid using unimplemented features or use a workaround such as a shim to emulate them. Modernizr aims to provide this feature detection in a complete and standardized manner.

jQuery is a JavaScript library designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax. It is free, open-source software using the permissive MIT License.

core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.

LazySizes is a JavaScript library used to delay the loading of images (iframes, scripts, etc) until they come into view.

D3.js is a JavaScript library for producing dynamic, interactive data visualisations in web browsers.

Handlebars provides the power necessary to let you build semantic templates effectively.

Adobe Experience Manager (AEM) is a comprehensive content management solution for building websites, mobile apps and forms.

Cloudflare is a company that provides content delivery network services, DDoS mitigation, Internet security and distributed domain name server services. Cloudflare's services sit between the visitor and the Cloudflare user's hosting provider, acting as a reverse proxy for websites.