A case study of Rails applications making a common Webpacker mistake of rendering modules multiple times on a single page. We'll describe why the problem happens and present a Webpacker Packing Checklist for proper code-splitting.

Navigate the world of Webpacker and webpack on Rails with confidence using this collection of mental maps I put together.

When running Rails system or integration tests, you might be surprised to learn that Webpacker will load your development webpack config. What's the deal?

In this post, we'll take a look at installing and using the webpack-bundle-analyzer, perhaps the most invaluable webpack plugin, to analyze and debug the output of the webpack build in a Rails project configured to use Webpacker.

A new Rails 6 application will install both Webpacker and Sprockets by default. Don't they solve the same problem? This article dives into why Sprockets lives on even though webpack has surpassed most of its features and why you might want to choose one over the other.

Understanding your Rails webpack configuration and build output can be a little confusing, especially if you're new to either Rails or webpack. This post contains a few tips for debugging your Webpacker setup, some specific to Rails Webpacker, some generally applicable to webpack.

Configuring webpack is precisely the main job of Webpacker's NPM package, @rails/webpacker. This post provides an overview of how to customize its default settings for your Rails application.

Configuring Webpacker can be a daunting task. In this guide, we will take a look at the options provided via the webpacker.yml file and supported environment variable overrides.

Upgrading jQuery plugins to work with webpack is a common source of confusion. If you're lucky, you may find they can work in either context such that you might not need jQuery at all.

There are plenty of great reasons to switch to Webpacker, including improvements in supported syntax, development tooling, performance optimizations, and more. For Rails developers considering the upgrade from the Rails asset pipeline, start here.

A reference guide to NPM version constraints for dependencies declared in the package.json file of a Rails project from the perspective of a Ruby developer familiar with similar conventions used to specify Ruby dependencies in a Gemfile.

When I first started working with webpack, I was in for a few surprises. I assumed how things should behave, based on my previous experience with the Rails asset pipeline, only to learn through experience how I was wrong.

Using images bundled by webpack can get confusing. 'How to reference images from JavaScript? from CSS? from Rails ERB templates? This post will demonstrate.

A big issue that comes up with Webpacker is "where to put the JavaScript files". This post demonstrates proper use of entry point files, called packs, with Webpacker and Rails and will help developers avoid a common gotcha.

This time we'll walk through the steps for integrating Bootstrap 4 with Rails and Webpacker 4.

This post explains why RSpec/Rails users should upgrade to Rails 5.1 and drop the DatabaseCleaner gem for JavaScript-enabled acceptance tests.

This post describes how to make enumerable methods that use blocks to iterate over an internal data structures but don't their enumerable properties and why this would be useful.

Is your Rails app on SSL in production? It may be a good idea to use SSL locally too. It's just that it's typically been a pain to set up. Using SSL for Rails acceptance tests with Capybara has traditionally been even more challenging— until now.

In this post, we describe the challenges we faced while replacing the Rails asset pipeline with webpack, how we solved those issues, and what we learned along the way.

This tutorial shows how to use Rails::Generators::TestCase to test drive your own Rails generators

This tutorial shows how to make a Progressive Web App on Rails using the serviceworker-rails gem

In which we talk about how N+1 queries allow Rails developers to opt for Russian Doll caching to address performance bottlenecks.

Recent changes to the sprockets-rails gem adds the ability to silence asset request logging in Rails 5

This blog post describes how to set up a simple demonstration of the Web Push and Service Worker JavaScript APIs to send notifications to users from a Ruby on Rails application.

This post demonstrates how to integrate the Service Worker Javascript API with the Rails asset pipeline to precache and render an offline page for your Rails application when visitors have no network connection.