Solid.js
A fine-grained reactive UI framework that uses signals (createSignal/createEffect/createMemo) and JSX compiled to direct DOM operations — components run once and only signal subscribers update, with no virtual DOM.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
innerHTML assignment via the innerHTML prop is an XSS vector; agents must use Solid's sanitization utilities or avoid it with untrusted content.
⚡ Reliability
Best When
Building performance-critical UIs where fine-grained reactivity without virtual DOM reconciliation is required and the team is comfortable with a signals-based mental model.
Avoid When
The team or AI agent is trained primarily on React patterns, as Solid's component model is fundamentally different and React habits produce broken Solid code.
Use Cases
- • Generating Solid.js components using createSignal for local state and createEffect for side effects with automatic dependency tracking
- • Building a SolidStart full-stack application with file-based routing, server functions, and streaming SSR
- • Implementing derived state with createMemo to create computed values that update only when their signals change
- • Creating a Solid.js store with createStore for nested reactive objects with fine-grained update tracking
- • Scaffolding high-performance list rendering with Solid's <For> and <Index> control flow components instead of array.map()
Not For
- • Teams expecting React semantics — Solid uses JSX but component functions run once, not on every render, breaking React mental models
- • Projects requiring a large ecosystem of third-party UI component libraries, as Solid's ecosystem is significantly smaller than React's
- • Developers who need extensive browser DevTools integration, as Solid lacks the mature DevTools ecosystem React has
Interface
Authentication
Framework — auth is implemented by the application via SolidStart middleware and server functions.
Pricing
Open source under MIT license.
Agent Metadata
Known Gotchas
- ⚠ Component functions run exactly once — agents trained on React will generate hooks-style logic inside render paths that never re-execute, silently breaking reactivity
- ⚠ Signal reads are tracked only when called inside a tracking scope (JSX template, createEffect, createMemo) — reading a signal outside tracking returns the value but creates no subscription
- ⚠ array.map() in JSX does not track additions/removals reactively; agents must use <For> (keyed) or <Index> (by position) control flow components instead
- ⚠ createStore nested property updates require the immer-style produce helper or direct path assignment — agents may generate React-style spread updates that lose Solid's fine-grained tracking
- ⚠ JSX in Solid compiles to DOM operations, not React.createElement — agents must not import or use React APIs, hooks, or context in Solid components even though the JSX syntax looks identical
Alternatives
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Scores are editorial opinions as of 2026-03-06.