ultra
A zero-legacy Deno/React Suspense SSR framework that eliminates bundling and leverages native browser ESM.
What is ultra?
Ultra is a web framework built for Deno and React that enables server-side rendering with Suspense while eliminating traditional bundling steps. It allows developers to write ECMAScript modules that run natively in browsers and on the server, simplifying the development toolchain. The framework focuses on leveraging modern browser features like import maps and streaming to create efficient web applications.
Frontend developers building React applications who want to simplify their toolchain and leverage modern browser capabilities without bundling overhead. Teams working with Deno who need SSR capabilities with React Suspense.
Developers choose Ultra for its zero-bundling approach that reduces complexity and build times while maintaining compatibility with much of the React ecosystem. Its philosophy of treating the browser as a first-class runtime rather than just a compilation target provides a more native development experience.
Overview
Zero-Legacy Deno/React Suspense SSR Framework
Use Cases
Best For
- Building React applications with Deno that require server-side rendering
- Teams wanting to eliminate bundling steps and ship native ESM to browsers
- Projects leveraging React Suspense for optimized loading states
- Applications needing API routing alongside frontend code
- Developers who want to use native browser import maps for module resolution
- Teams looking to simplify their web development toolchain and reduce dependencies
Not Ideal For
- Projects requiring extensive support for older browsers (e.g., Internet Explorer or pre-import map versions), as Ultra relies on modern features like native ESM and import maps.
- Teams wanting a batteries-included framework with built-in routing, styling, and data fetching, since Ultra's less opinionated design requires BYO libraries and setup.
- Applications that depend heavily on bundler optimizations like automated code splitting, tree shaking, or asset minification, which Ultra's zero-bundling approach may not provide.
Pros & Cons
Pros
Eliminates complex bundling steps by shipping unbundled ECMAScript modules directly to the browser, reducing build times and toolchain complexity, as highlighted in the README's philosophy against bundling as an anti-pattern.
Leverages native browser capabilities like import maps and streaming, treating the browser as a first-class runtime to simplify development and align with modern web standards.
Less opinionated design allows developers to bring their own routing, styling, and data fetching libraries, providing adaptability for diverse project needs, as noted in the 'What's new' section.
Supports server-side rendering with React's Suspense for optimal loading states, enabling modern React applications without additional configuration overhead.
Cons
Relies on native import maps and ESM, which have limited support in browsers like Safari and Firefox, potentially requiring polyfills or excluding older environments, as indicated in the wishlist for broader browser support.
Being less opinionated means developers must manually integrate and configure third-party libraries for core functionalities like routing and styling, adding to setup complexity compared to more integrated frameworks.
The zero-bundling approach may miss out on performance optimizations provided by bundlers, such as efficient code splitting or tree shaking, which could impact load times for larger applications.
Frequently Asked Questions
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