Ruby 1.8 on OS X Mavericks can fail to build therubyracer and libv8 native extensions; updating the gems or linking a Homebrew V8 build can restore bundling.

Rails asset management becomes easier with bower-rails, using a Bowerfile and rake tasks to install, list, update, and rewrite vendored front-end packages.

Exclude individual files from RubyMine search and navigation by adding filename masks in Project Structure settings.

Yarn integrity warnings can block rails console even when packages are current; stale Spring cache may keep the error until spring stop clears it.

esbuild output can disappear after a Capistrano deploy when app/builds is not committed, leaving public/assets incomplete. Sprockets may ignore files in unknown paths.

Tradeoffs between progressive enhancement with jQuery-style approaches and client-side views affect interactivity, complexity, and how much rendering stays on the server.

Currently not possible as the linked .htc file contains JavaScript which is not explicitly called.

The developers are working on a pure JavaScript solution which will have some downsides but work across different domains.

Capybara sets up some tags for you to use in Cucumber. Often you’ll want to run only some scenarios with a driver that supports JavaScript, Capybara makes this easy: simply tag the scenario (or feature) with @javascript:

therubyracer installation on Ruby 1.8 can fail when extconf.rb loads an incompatible libv8 version, causing a missing include_path method.

Using window.jQuery in ProvidePlugin can leave jQuery undefined in the browser while $ still works; assigning through global avoids the conflict.

Rails secrets and other configuration values can be read inside webpack bundles with rails-erb-loader, enabling environment-specific client-side settings without hardcoding them.

Capistrano deployment warnings can appear when Rails asset pipeline apps lack empty public subdirectories. Placeholder files like .gitkeep suppress the missing-path errors.

If you have several submit elements (inputs or buttons with type="submit") that each cause different things to happen (e.g. you might have a button that sends an extra attribute) you might run into trouble when submitting the form by pressing the return key in a field.

When nothing fancy like a tabindex is defined it seems as if the first submit element inside a form is chosen (and has its attributes submitted) when pressing return.\
So, if possible, put your "default" (aka least harmful) submit element before others.

NB: If you s...

Check whether form controls or buttons are disabled in Cucumber step definitions, using label-based assertions on Capybara or Webrat elements.

bower may fail on Ubuntu when /usr/bin/node is missing; using Ubuntu’s node package can also leave bower unresponsive. A symlink to nodejs fixes the mismatch.

Automatically placing the cursor in a form field improves first interaction and removes an extra click. HTML5 autofocus works in modern browsers; jQuery can provide a fallback.

bin/webpack-dev-server can fail with Yarn's "Command "webpack-dev-server" not found" error when dependencies are missing; yarn install --check-files restores the command.

Create offline-capable web apps with service workers, including caching, updates, and background control for better resilience and performance.

Non-standard asset manifests are not precompiled by default, so custom config.assets.precompile entries are needed for additional CSS and JS bundles.