Doomsday Trainer

This is a web app that helps you practice the Doomsday algorithm by John Conway, a method for calculating the day of the week of any given date. The app shows you a random date and lets you guess what weekday it was. You can check your answer and how long you took.

The app is built with Gatsby, a React-based framework that generates fast and secure websites. You can use the app in your web browser, or install it as a PWA (progressive web app) on your device.

Project based on the Gatsby Typescript Starter.

Features

• ⚡️ Gatsby 5
• ⚛️ React 18
• ⛑ TypeScript
• 🐐 Tests — Vitest and Testing Library out of the box
• 📏 ESLint — To find and fix problems in your code
• 💖 Prettier — Code Formatter for consistent style
• 🐶 Husky — For running scripts before committing
• 🚓 Commitlint — To make sure your commit messages follow the convention
• 🖌 Renovate — To keep your dependencies up to date
• 🚫 lint-staged — Run ESLint and Prettier against staged Git files
• 👷 PR Workflow — Run Type Check & Linters on Pull Requests
• ⚙️ EditorConfig - Consistent coding styles across editors and IDEs
• 🗂 Path Mapping — Import components or images using the @ prefix

Quick Start

The best way to start with this template is using the Gatsby CLI.

npx gatsby new starter-ts https://github.com/jpedroschmitz/gatsby-starter-ts

Development

To start the project locally, run:

pnpm start

Open http://localhost:8000 with your browser to see the result.

Documentation

Requirements

• Node.js >= 18
• pnpm 7

Directory Structure

• __helpers__ — Helpers files for testing configuration.
  
• __mocks__ — Mocks for testing.
  
• .github — GitHub configuration including the CI workflow.
  
• .husky — Husky configuration and hooks.
  
• src — Application source code, including pages, components, styles.

Scripts

• pnpm start — Starts the application in development mode at http://localhost:8000.
• pnpm build — Compile your application and make it ready for deployment.
• pnpm serve — Serve the production build of your site
• pnpm clean — Wipe out the cache (.cache folder).
• pnpm type-check — Validate code using TypeScript compiler.
• pnpm lint — Runs ESLint for all files in the src directory.
• pnpm format — Runs Prettier for all files in the src directory.
• pnpm test — Run tests with Vitest.
• pnpm test:watch — Run tests on watch mode.

Path Mapping

TypeScript are pre-configured with custom path mappings. To import components or files, use the @ prefix.

import { Button } from '@/components/Button';

// To import images or other files from the static folder
import avatar from '@/static/avatar.png';

Switch to Yarn/npm

This starter uses pnpm by default, but this choice is yours. If you'd like to switch to Yarn/npm, delete the pnpm-lock.yaml file, install the dependencies with Yarn/npm, change the CI workflow, Husky Git hooks to use Yarn/npm commands, and uninstall the gatsby-plugin-pnpm plugin (you also need to remove it from the gatsby-config file).

License

This project is licensed under the BSD Zero Clause License - see the LICENSE file for more information.