![]() ![]() What I mean by abstraction layer here is that there wouldn’t be a need to configure Webpack and it would just work out of the box but configuration aspects are hidden behind the scenes and changing them required to change a webpacker.yml and not the Webpack config directly. ![]() One disadvantage could be that the bundling tool is locked to Webpack behind an abstraction configuration layer as it was the default asset management approach picked for version 6.0.0 of Rails. To install dependencies, yarn install needs to be run but when rails server is ran it would spin up the Rails application and run the Webpack watch task so that the assets are bundled correctly. It would also include a package.json which has become common to use in any application that makes use of Node modules. With Webpacker a config/webpacker.yml is used as an interface to define the app’s Webpack configuration and a config/webpack folder was used store files to specify handling of assets in different environments (development, production) or to adapt it to use certain JavaScript libraries which might require additional configuration. This is a quick overview of Webpacker so that we can draw a comparison with more recent approaches to asset bundling. This asset management approach was introduced in Rails 6 and is essentially an implementation of Webpack specifically configured to be used with Rails. Hopefully this article can be used as a starting point for someone who uses JavaScript tools to bundle assets but has little knowledge of how this currently works in the context of a Rails app. This article aims to explore Import Maps and custom bundling setups on a high level including a quick look over Webpacker so that it can be compared with other approaches, a short example of using Import Maps and a more convoluted example of custom bundling using esbuild with TypeScript and PostCSS. On Ruby on Rails 7 the asset management processes have changed from using Webpacker to use the asset pipeline with Import Maps by default as a way to streamline uses of JavaScript based tools and package managers such as Webpack (or other bundlers) Yarn or npm. ![]()
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