When using Webpack Encore in a project with"type": "module" in package.json the resulting bundle file containsrequire calls which include the polyfills through@babel/preset-env. These should have been replaced by wepack with the file contents. This problem does not occur when using a simple plain webpack config.

Removing"type": "module" (and rewriting the config as commonjs) the issue is not present.

Reproduction repository:https://github.com/m10/encore-type-module
Also see branch "commonjs" for a working version without type module:https://github.com/m10/encore-type-module/tree/commonjs
and the branch "webpack" for a working version with type module but without encore, using a simple webpack config instead:https://github.com/m10/encore-type-module/tree/webpack