Best JavaScript Libraries in the UK - Page 2

Organize your app in terms of small Views. Marionette makes it easy to compose rich layouts out of small components. We've added tons of features from templateHelpers, to a declarative UI hash, that will keep you from ever wanting to go back. Share complex UI interactions across views. Behaviors are like mixins, without all of the pain associated with property collision. Decoupled communication between your application components with a powerful messaging system. Write classes with the same API as your views. Marionette Objects support features like extend, events, initialize, and more. Marionette community is home to the most welcoming and vibrant discussions in the Backbone ecosystem. Stop spending more time thinking about your framework than your app. Marionette will never get in the way of you and your code.

Auth.js is an open-source authentication library designed to integrate seamlessly with modern JavaScript frameworks, providing a flexible and secure authentication experience. It supports various authentication methods, including OAuth (e.g., Google, GitHub), credentials, and WebAuthn, allowing developers to choose the most suitable approach for their applications. Auth.js is compatible with multiple frameworks, such as Next.js, SvelteKit, Express, Qwik, and SolidStart, enabling developers to implement authentication across different platforms. The library offers built-in support for popular databases like Prisma, Drizzle ORM, Supabase, Firebase, and TypeORM, facilitating user data management. Security features include signed cookies, CSRF token validation, and encrypted JSON Web Tokens (JWTs), ensuring robust protection for user data. Auth.js is designed to operate efficiently in serverless environments and provides comprehensive documentation and examples.

​BullMQ is a Node.js library that implements a fast and robust queue system built on top of Redis, designed to address various challenges in modern microservices architectures. It is structured around four primary classes. BullMQ offers features like minimal CPU usage due to a polling-free design, distributed job execution based on Redis, support for both LIFO and FIFO jobs, job priorities, delayed and scheduled jobs according to cron specifications, automatic retries of failed jobs, concurrency settings per worker, sandboxed processing functions, automatic recovery from process crashes, and parent-child job dependencies. These capabilities make BullMQ a powerful tool for building scalable and reliable job processing systems in Node.js applications.

Dexie.js is a minimalistic and bulletproof IndexedDB wrapper library designed to simplify client-side storage. At only ~29k minified and gzipped, it offers a concise API that addresses the complexities of native IndexedDB, such as ambivalent error handling, poor queries, lack of reactivity, and code complexity. Dexie.js provides a well-thought-through API design, robust error handling, extendability, change tracking awareness, and extended KeyRange support, including case-insensitive search, set matches, and OR operations. It embraces the IndexedDB specification and all its features, allowing developers to use existing IndexedDB data without the need for data migration. Dexie.js supports composable real-time queries, enabling components to mirror the database in real-time across various front-end frameworks like React, Svelte, Vue, and Angular. With Dexie Cloud, developers can build consistent, authenticated, and access-controlled local-first apps with just a few lines of extra code.

Fluree is an immutable RDF graph database written in Clojure and adhering to W3C standards, supporting JSON and JSON-LD while accommodating various RDF ontologies; it boasts a scalable, cloud-native architecture utilizing a lightweight Java runtime, with individually scalable ledger and graph database components, embodying a "Data-Centric" ideology that treats data as a reusable asset independent of singular applications, underpinned by an immutable ledger that secures transactions with cryptographic integrity, alongside a rich RDF graph database capable of various queries, and employs SmartFunctions for enforcing data management rules, including identity and access management and data quality.

A simple library to take care of complicated animations. You can also add custom functions that do non-CSS animations! Install and save to your package.json, and include it in your Javascript. Brew up some instant scroll animations. Animate based on scroll location, animate based on mouse X location and create multiple animations based on mouse X location. Now you can create an instance of Choreographer, and run the animations based on whatever measurement floats your boat (ex. scroll position, mouse position, timestamp, whatever). The easiest way to understand how this all works is to check out the examples. Bugs will occur if you overlap animation ranges that affect the same style properties! There are two built-in animation functions available, called 'scale' and 'change'. Progress is what allows for progressive scaling of values (ex. smooth fading of opacity, 2d translation, etc.) If the value is between 0 and 1, that means you are within a range.

In most cases, the connection will be established with WebSocket, providing a low-overhead communication channel between the server and the client. Rest assured! In case the WebSocket connection is not possible, it will fall back to HTTP long-polling. And if the connection is lost, the client will automatically try to reconnect. Scale to multiple servers and send events to all connected clients with ease. Socket.IO is a library that enables low-latency, bidirectional and event-based communication between a client and a server. It is built on top of the WebSocket protocol and provides additional guarantees like a fallback to HTTP long-polling or automatic reconnection. WebSocket is a communication protocol that provides a full-duplex and low-latency channel between the server and the browser. There are several Socket.IO server implementations available. And client implementations in most major languages.

Clarity is a programming language that brings smart contracts to Bitcoin. It’s optimized for security and predictability, and it gives developers a safe way to build complex smart contracts. Clarity is designed for high-stakes code where bugs are not an option. Modular core packages for identity, authentication, storage, transactions, stacking, and more. JS bindings for integrating with the Hiro Wallet for Web and leveraging all Stacks blockchain features. Rapidly integrate Clarity smart contracts into your apps.

Redux is a JavaScript library designed for predictable and maintainable global state management in applications. It assists developers in writing applications that behave consistently across different environments, client, server, and native, and are easy to test. By centralizing an application's state and logic, Redux enables powerful capabilities such as undo/redo functionality and state persistence. The Redux DevTools facilitate tracing when, where, why, and how an application's state changes, offering features like time-travel debugging and comprehensive error reporting. Redux is flexible and works with any UI layer, supported by a large ecosystem of add-ons to meet various development needs. The Redux team also provides additional libraries, including React-Redux, the official React bindings for Redux, and Redux Toolkit, an opinionated toolset for efficient Redux development.