GitHub - rails/importmap-rails: Use ESM with importmap to manage modern JavaScript in Rails without transpiling or bundling.

Import maps let you import JavaScript modules using logical names that map to versioned/digested files – directly from the browser. So you can build modern JavaScript applications using JavaScript libraries made for ES modules (ESM) without the need for transpiling or bundling. This frees you from needing Webpack, Yarn, npm, or any other part of the JavaScript toolchain. All you need is the asset

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“Expected errors from using the es-module-shim ”