In a world of constantly evolving JavaScript frameworks, Mithril.js continues to maintain relevance and a dedicated user base in 2025. This lightweight framework, weighing in at just 8.96 KB gzipped, has demonstrated remarkable staying power in an ecosystem where new tools frequently rise and fall.
A Framework Built for Performance and Simplicity
Mithril.js positions itself as a modern client-side JavaScript framework specifically designed for building Single Page Applications (SPAs). Beyond its minimal size, it offers built-in routing and XHR utilities without requiring additional dependencies. What sets Mithril apart from many competitors is its focus on performance and simplicity, with no build step required for implementation. Users can simply include the framework via CDN and start developing immediately.
I want full control over my data and not outsource it to a lib that will dictate the shape of it. Mithril only does rendering cycles while being completely data-agnostic. It's basically react without its functional abracadabra.
Mithril.js Key Features
- Size: 8.96 KB gzipped
- Built-in routing and XHR utilities
- No build step required
- Browser support: IE11, Firefox ESR, and the last two versions of Firefox, Edge, Safari, and Chrome
- No polyfills required
- Used by companies like Vimeo and Nike, and platforms like Lichess
Long-Term Stability in a Volatile Ecosystem
Community discussions reveal that Mithril.js has maintained stability and maturity compared to many similar hyperscript-based libraries. While numerous JavaScript frameworks have come and gone since Mithril's introduction, users note its longevity as particularly impressive. Some developers mention using Mithril as far back as 2015, with one commenter expressing surprise at still seeing it on Hacker News in 2025, highlighting the framework's unusual staying power in a rapidly changing technological landscape.
Real-World Applications and Success Stories
Several developers shared experiences of using Mithril.js for complex projects, particularly before React became the dominant force it is today. One developer credited Mithril with saving a project involving a complex form view in an otherwise vanilla jQuery page. Another recounted successfully building a series of obnoxiously complex manufacturing cost calculators for a major client. These testimonials highlight Mithril's particular strength in handling complex state management and UI updates in an era when such capabilities weren't as common.
Developer Experience and Syntax Preferences
While Mithril traditionally uses a hyperscript approach (JavaScript functions to create HTML elements) rather than JSX-style syntax, the framework does support JSX for those who prefer it. This flexibility allows developers to choose their preferred syntax style while maintaining Mithril's performance benefits. The community appears divided on syntax preferences, with some appreciating the hyperscript approach and others finding JSX more readable.
Mithril.js continues to serve a specific niche in the front-end development ecosystem - developers who prioritize small bundle size, performance, and a framework that doesn't dictate data structure. As web applications grow increasingly complex, this lightweight yet capable tool demonstrates that sometimes less truly is more.
Reference: Mithril.js