Question 1

How do I set up hot reloading with elm-webpack-loader?

Accepted Answer

Install elm-hot-webpack-loader and add it to your Webpack config before elm-webpack-loader in the loader array. Ensure correct ordering to enable hot module replacement for Elm modules during development.

Question 2

elm-webpack-loader vs using elm make directly: which is better?

Accepted Answer

elm-webpack-loader integrates Elm into Webpack for dependency tracking and hot reloading, ideal for mixed JavaScript-Elm projects. Use elm make directly for pure Elm apps without Webpack, as it's simpler but lacks these integrated features.

Question 3

How to optimize elm-webpack-loader for production builds?

Accepted Answer

Set the optimize option to true in the loader configuration, which enables Elm's optimization flags. Combine this with Webpack's production mode to reduce bundle size and improve runtime performance.

Question 4

Does elm-webpack-loader support Elm 0.19?

Accepted Answer

Yes, from version 5.0.0 onwards, elm-webpack-loader only supports Elm 0.19. Earlier versions supported Elm 0.18, so check your version for compatibility.

Question 5

How to profile compilation performance with elm-webpack-loader?

Accepted Answer

Use the runtimeOptions setting with flags like '-s' to enable profiling. This prints garbage collector statistics and other runtime info, helping identify bottlenecks in the build process.

Question 6

Can I bundle multiple Elm files into one output with elm-webpack-loader?

Accepted Answer

Yes, use the files option to specify multiple Elm modules for compilation into a single bundle. This allows combining modules similar to elm make, and you can import them separately in JavaScript.

elm-webpack-loader

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