Preact is a lightweight alternative to React, designed to have a smaller footprint. It offers a similar API to React but with a smaller bundle size, making it a good choice for projects where size is a concern. Riot, on the other hand, is also lightweight and focuses on minimalism, providing a small bundle size as well.
React follows a virtual DOM-based component model, where components are defined using JSX and rendered efficiently using a diffing algorithm. Preact, being a React alternative, also follows a similar component model and supports JSX. Riot, on the other hand, uses a different approach called 'tags', which are small, self-contained components that can be easily reused and nested.
React has a mature and well-documented ecosystem, with a large number of resources, tutorials, and community support. It has a strong tooling ecosystem, including tools like React DevTools and Create React App, which enhance the developer experience. Preact, being a React-compatible library, offers a similar developer experience with most React tools and libraries being compatible. Riot, while having a smaller community, still provides a good developer experience with its own set of tools and documentation.
Preact is known for its performance optimizations and smaller bundle size, making it faster to load and render compared to React. Riot also focuses on performance and has a small footprint, which can lead to faster initial rendering. However, React has a larger community and more resources dedicated to performance optimizations, making it easier to find solutions for specific performance needs.
React is widely used in large-scale applications and has proven to be scalable. It has a mature ecosystem with solutions for state management (e.g., Redux, MobX) and routing (e.g., React Router). Preact, being a React-compatible library, can also be used in large-scale applications with similar scalability. Riot, while suitable for smaller projects, may have limitations in terms of scalability due to its smaller community and ecosystem.