Solid.js Final Project — Build a Complete Application

In this tutorial, you will learn about Solid.js Final Project. We cover key concepts, practical examples, and best practices to help you master this topic.

Build a complete Solid.js application with signals, context, routing, forms, async data, and testing for production deployment.

In this project, you'll combine everything you've learned to build a real-time dashboard application.

What You'll Build

A real-time dashboard with: user authentication via context, route-based pages, data fetching with createResource, interactive forms, and a testing suite.

Why It Matters

This project simulates a real-world Solid.js application. Completing it demonstrates you can build and ship a complete Solid.js app independently.

Real-World Use

This project mirrors Doda Browser's extension dashboard architecture, demonstrating signals, context, and resource management.

flowchart TD
    A[App] --> B[Auth Context]
    A --> C[Router]
    C --> D[Dashboard]
    C --> E[Settings]
    C --> F[Profile]
    D --> G[Metrics Panel]
    D --> H[Activity Feed]
    style A fill:#2c4f7c,color:#fff

Step 1: Project Setup

npm init solid@latest dashboard
cd dashboard
npm install @solidjs/router

Step 2: Auth Context

Create an AuthContext with signals for user state, loading state, login/logout functions, and provide it at the app root.

Step 3: Routing

Set up routes: / (dashboard), /settings (preferences), /profile (user profile). Each route is a separate component.

Step 4: Dashboard Page

Fetch dashboard metrics with createResource, display loading state with <Suspense>, show metrics in cards using <For>.

Step 5: Settings Form

Build a settings form with signals, reactive validation, and save to context/localStorage.

Step 6: Testing

Write tests for signals, components, and async resources using Vitest.

Common Mistakes

1. Not organizing signals: Group related signals into contexts or stores. Avoid scattering signals across components.
2. Skipping error handling: Resources can fail. Show error states in the UI.
3. Over-nesting providers: Multiple contexts can be nested but keep the tree flat for readability.
4. Not optimizing list rendering: Use <For> for all lists. Avoid .map() in templates.
5. Forgetting cleanup: Effects with subscriptions need cleanup functions.

Practice Questions

1. What state management approach is used? Answer: Signals and context. No external state library needed.

2. How is async data handled? Answer: createResource for fetching, <Suspense> for loading states.

3. How are forms validated? Answer: Reactive validation with createMemo that returns error messages.

4. What testing strategy is recommended? Answer: Vitest with solid-testing-library for component tests and direct signal tests for logic.

Challenge

Extend the project with: real-time WebSocket updates using createResource with periodic refetch, dark mode theme context, animated page transitions, and E2E tests with Playwright.

Mini Project

Deploy your completed dashboard to Vercel or Netlify. Set up automatic deployment from GitHub, add analytics, and configure a custom domain.

FAQ

What's Next

Congratulations on completing the Solid.js guide! Explore React Guide to compare Solid.js with the industry's most popular UI library.