SolidJS is a declarative JavaScript library for creating user interfaces. It's designed to be simple, performant, and pragmatic.

Why SolidJS?

SolidJS offers several advantages:

Fine-grained reactivity: Updates only what changes
No Virtual DOM: Direct DOM manipulation for better performance
Small bundle size: Minimal runtime overhead
Familiar syntax: JSX-like syntax similar to React

Basic Example

Here's a simple counter component in SolidJS:

import { createSignal } from "solid-js";

function Counter() {
  const [count, setCount] = createSignal(0);

  return (
    <button onClick={() => setCount(count() + 1)}>
      Count: {count()}
    </button>
  );
}

Key Concepts

Signals

Signals are the foundation of reactivity in SolidJS. They're the most basic reactive primitive.

Effects

Effects run side effects that depend on signals and automatically re-run when those signals change.

Derived Signals

You can create computed values that automatically update when their dependencies change.

Conclusion

SolidJS provides a powerful and efficient way to build modern web applications. Its fine-grained reactivity system ensures optimal performance while maintaining a developer-friendly API.

Happy coding!