Ivi

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ivi is a lightweight, embeddable web UI library that provides a declarative approach to building user interfaces. It features a blazingly fast template compiler written in Rust for optimized performance and small memory footprint.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is ivi?

ivi is a lightweight and embeddable declarative Web UI library designed for building efficient web interfaces. It emphasizes a functional approach where UI is a direct result of the application's state. Key features include a highly optimized template compiler written in Rust, leveraging the oxc library for JavaScript parsing, which contributes to its small memory footprint and fast cold-start performance. The library supports precompiled templates for improved performance and reduced code size, with a basic example weighing in at just 2.7KB (minified+brotli). It offers integrations with popular bundlers like Vite and Rollup, providing plugins that enable hoist and dedupe optimizations. ivi's template language is HTML-like, supporting dynamic content through JavaScript expressions, element properties, attributes, styles, events, and directives, offering flexibility for complex UI logic and conditional rendering.

Best used for

Ideal for developers who need to build high-performance web user interfaces, optimize application bundle size, and ensure fast cold-start times. Especially valuable for projects requiring embeddable UI components and those leveraging modern build tools like Vite or Rollup for efficient code compilation.

Common actions

build web UI

optimize web performance

create embeddable components

develop declarative interfaces

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Capabilities

Key features

Rust-based template compiler
Precompiled templates
Vite and Rollup plugins
Small memory footprint
Embeddable UI library
HTML-like template syntax
Declarative UI rendering

Target Audience

developer

Integrations

viterollup

Pricing & Plans

Open Source

Free

FAQs

What makes ivi lightweight and performant?

ivi achieves its lightweight and performant nature through a blazingly fast template compiler written in Rust, which optimizes templates for size and performance. It also boasts a small memory footprint and supports precompiled templates, resulting in a minimal bundle size for the runtime and declarative UI rendering.

Does ivi integrate with popular JavaScript bundlers?

Yes, ivi provides dedicated plugins for popular JavaScript bundlers like Vite and Rollup. These plugins enable advanced optimizations such as hoist and dedupe, further enhancing performance and reducing code size when building applications with ivi.

Can ivi handle dynamic content and complex UI logic?

Absolutely. ivi's HTML-like template language allows for the inclusion of dynamic content using JavaScript expressions. This enables developers to implement complex UI logic, conditional rendering, and manage element properties, attributes, styles, events, and directives effectively within their templates.

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