What it does
SolidJS is a JavaScript UI library whose reactive signals update the expressions that depend on them, while its compiled templates target real DOM nodes. The official quick start scaffolds an application with create-solid, and its concepts guide explains signals, derived values, and effects. It suits teams that want reactive interfaces but should be evaluated with its own execution model rather than treated as a drop-in React clone.
The official quick start uses npm init solid to run the create-solid project scaffold. It expects familiarity with the command line and a recent Node.js, Bun, or Deno runtime; the scaffold asks which starter choices to use. For a first experiment, create a counter with createSignal(0), then read the signal in JSX and update it from a button handler. The documentation's example shows the dependent expression updating when the signal changes.
Solid's execution model is worth learning before porting code from another UI library. The official reactivity guide explains that a component function sets up its reactive graph and that tracked expressions update when their dependencies change; it is not simply a function that reruns in the same way as a React component on every state change. That difference can make updates efficient, but it also changes where developers place state and effects.
The core Solid repository is MIT-licensed. Solid's product homepage returned an empty response through the public page fetcher; the description and workflow here rely on the readable official documentation and repository instead. The Solid ecosystem also has separate projects such as SolidStart and Solid Router; this entry covers the core UI library.
Strengths
- The quick start scaffolds a project and supports recent Node.js, Bun, or Deno runtimes.
- Signals make the state dependencies for reactive UI expressions explicit.
- The repository demonstrates the library's JSX and fine-grained update approach.
Watch out for
- The reactive execution model differs from React-style component rerendering and needs its own learning step.
- Project setup requires a JavaScript runtime and a chosen application scaffold.
Best for
- JavaScript interfaces where fine-grained reactive updates are a deliberate design choice.
- Developers willing to learn signals and Solid's component execution model.
- Projects that want a scaffolded application based on the core Solid library.
Sources
- Quick start (Oct 25, 2026)
- Intro to reactivity (Oct 25, 2026)
- solidjs/solid README (Oct 25, 2026)
- solidjs/solid (Oct 25, 2026)
- MIT License (Oct 25, 2026)