Rails Svelte Inertia Tinker

joekrump

tinkering with svelte + inertia + rails

Templatus (Inertia edition)

Templatus is an opinionated template to build web applications with Ruby on Rails and Inertia (using Svelte.js). It simplifies the process of setting up a new application while following best practices.

Features / Technology stack

Backend

Ruby 3.2
Ruby on Rails 7.1
ActionCable for WebSocket communication
PostgreSQL for using as SQL database
Sidekiq for background processing
Redis for Caching, ActionCable, and Sidekiq

Frontend

Inertia as a protocol for frontend/backend communication
Tailwind CSS 3 to not have to write CSS at all
Tabler Icons for free SVG icons
Vite for bundling JavaScript and CSS with Hot Module Replacement (HMR) in development

Development

Puma-dev for using .test TLD (instead of localhost:3000) and https in development
Overmind for starting up the application locally (Procfile handling like Foreman)
dotenv to load environment variables from .env into ENV
TypeScript for writing strongly-typed JavaScript
Prettier for auto-formatting TypeScript and Ruby code in Visual Studio Code
annotate for annotating models and routes

Linting and testing

RuboCop for Ruby static code analysis
RSpec for Ruby testing
ESLint for TypeScript static code analysis
Cypress for E2E testing

Deployment

Docker for production deployment, NOT for development
DockerRailsBase for fast building an optimized Docker image based on Alpine Linux
GitHub Actions for testing, linting, and building Docker image
Dependabot configuration for updating dependencies (with auto-merge)
Ready for serving assets via CDN like CloudFront
Honeybadger for error tracking in Ruby and TypeScript
Plausible for privacy friendly analytics

Production

Lograge for single-line logging
Gzip compression of dynamic responses (HTML, JSON) using Rack::Deflater
Fine-tuned Content Security Policy (CSP)

Metrics

This template is developed with optimized performance and security in mind. The following benchmarks are performed against the demo installation on production. It uses an inexpensive virtual server on the Hetzner Cloud behind a Traefik setup.

Lighthouse site performance

100% in all categories.

Security headers

What's the red Permissions-Policy badge? This seems to be fixed with one of the next Rails update: https://github.com/rails/rails/pull/41994

Mozilla Observatory

WebPageTest

GTmetrix

Check-your-website

JavaScript size

176 KB of compiled JavaScript (after tree-shaking, minified & uncompressed).

$ RAILS_ENV=production bin/rails assets:precompile
yarn install v1.22.19
[1/6] 🔍  Validating package.json...
[2/6] 🔍  Resolving packages...
success Already up-to-date.
✨  Done in 0.11s.
Building with Vite ⚡️
vite v4.4.11 building for production...
transforming...
✓ 4980 modules transformed.
rendering chunks...
computing gzip size...
../../public/vite/manifest-assets.json               0.10 kB │ gzip:  0.09 kB
../../public/vite/assets/logo-10f03a2b.svg           0.50 kB │ gzip:  0.30 kB
../../public/vite/manifest.json                      0.57 kB │ gzip:  0.22 kB
../../public/vite/assets/application-e151bf91.css   21.46 kB │ gzip:  4.88 kB
../../public/vite/assets/application-eb9572d8.js    29.73 kB │ gzip: 11.17 kB │ map:  58.05 kB
../../public/vite/assets/vendor-597444d4.js        181.57 kB │ gzip: 61.41 kB │ map: 818.86 kB
✓ built in 21.26s
Build with Vite complete: /Users/ledermann/Projects/templatus-inertia/public/vite

Network transfer

Small footprint: The demo application transfers only 71 KB of data on the first visit.

Docker build time

With multi-stage building and using DockerRailsBase the build of the Docker image takes very little time. Currently, the deploy job requires about 1,5 minutes on GitHub Actions (see https://github.com/templatus/templatus-inertia/actions)

Docker image size

The Docker image is based on Alpine Linux and is optimized for minimal size (currently 115 MB uncompressed disk size). It includes just the bare minimum - no build tools like Node.js, no JS sources (just the compiled assets), no tests.

$ container-diff analyze ghcr.io/templatus/templatus-inertia -n

-----Size-----

Analysis for ghcr.io/templatus/templatus-inertia:
IMAGE                                 DIGEST     SIZE
ghcr.io/templatus/templatus-inertia   sha256:... 115M

Getting started

Install for development

Clone the repo locally:

git clone [email protected]:templatus/templatus-inertia.git
cd templatus-inertia

Install PostgreSQL, Redis, and puma-dev (if not already present). On a Mac with Homebrew, run this to install from the Brewfile:

brew bundle

Set up puma-dev to use HTTPS for development. Do this on macOS:

sudo puma-dev -setup
puma-dev -install
puma-dev link

# Use Vite via puma-dev proxy
# Adopted from https://github.com/puma/puma-dev#webpack-dev-server
echo 3036 > ~/.puma-dev/vite.templatus-inertia

Setup the application to install gems and NPM packages and create the database:

bin/setup

Start the application locally:

bin/dev

Replace all instances of rails-svelte-inertia-tinker with the directory that this project appears in Then open https://rails-svelte-inertia-tinker.test in your browser.

Running linters

RuboCop:

bin/rubocop

ESLint:

bin/yarn lint

TypeScript compiler:

bin/yarn tsc

Running tests locally

Ruby tests:

bin/rspec
open coverage/index.html

JavaScript unit tests:

bin/yarn test

E2E tests with Cypress:

bin/cypress open

This opens Cypress and starts Rails in development environment, but with CYPRESS=true, so the test database is used. This allows code editing without class reloading and recompiling assets.

To run Cypress in headless mode:

bin/cypress run

Test deployment locally

docker network create public
docker-compose up

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