Client-side validation provides instant feedback, but server-side validation is the source of truth. I use Stimulus to add real-time validations (format, length, required fields) while still rendering server errors when validations fail on submit. The

Infinite scroll improves perceived performance by loading content as users reach the bottom of the page. I combine Turbo Frames with the Intersection Observer API via a Stimulus controller. The last item in each page has a sentinel element that, when

The default browser confirm() dialog is ugly and doesn't match your design system. Turbo provides hooks to intercept confirmation dialogs and show custom modals instead. I listen for the turbo:before-fetch-request event, check if the element has data-

Dependent dropdowns are a classic UX pattern where one select populates based on another's value. With Stimulus, I handle this entirely client-side after the initial page load by storing options as data attributes or fetching them via AJAX. When the p

Loading everything on initial page render slows perceived performance. Lazy-loaded Turbo Frames defer expensive content until it's needed, keeping initial page loads fast. Setting loading='lazy' with a src attribute tells Turbo to fetch content when t

Turbo Streams enable surgical DOM updates from the server without writing JavaScript. After a successful form submission, instead of redirecting, I return a Turbo Stream response that appends, prepends, replaces, or removes specific elements. This is

Stimulus brings just enough JavaScript to make static Rails views interactive while staying close to the HTML. Controllers connect to DOM elements via data-controller, and actions bind to events with data-action. I use Stimulus for client-side validat

Turbo Frames scope navigation to a specific section of the page, making inline editing feel instant without full page reloads. When a link or form inside a <turbo-frame> is submitted, only that frame's content updates. I use this pattern extensi

Production visibility requires more than basic request logging. I instrument critical code paths using ActiveSupport::Notifications to publish custom metrics that monitoring services consume. Each instrumented block publishes events with timing data,

ActiveJob provides a unified interface across different queue backends (Sidekiq, Resque, Delayed Job), making it easier to switch adapters or test jobs. I define jobs by inheriting from ApplicationJob and implementing perform. ActiveJob handles serial

Complex reporting queries with multiple joins and aggregations can become unmaintainable in ActiveRecord. PostgreSQL views encapsulate query complexity in the database layer and appear as regular tables to Rails. I create views for common reporting ne

Long-running requests tie up worker threads and degrade overall application responsiveness. Rack::Timeout enforces request timeouts at the Rack layer, killing requests that exceed configured limits. I set conservative timeouts (15-30 seconds) and hand