Provides support for the Elm programming language in IntelliJ and WebStorm.

Features

• Code completion
• Go to declaration
• Go to symbol
• Find usages
• Rename refactoring
• Syntax highlighting
• Mark unresolvable references as errors
• 'Import' quick fix for unresolved references
• Structure view
• and more...

Attaching Elm JSON files

One major change since earlier versions of this plugin is that you must now attach your Elm project's JSON manifest file (either elm-package.json for Elm 0.18 or elm.json for 0.19). The plugin will try to find this JSON file on its own, but you may need to manually attach it if the magic fails.

Integrating with elm-format

See the elm-format integration instructions.

Development

There is still a lot of work left to do, but PRs are welcome. To build the plugin you will need to do the following:

• setup the IntelliJ Plugin SDK toolchain link
• install the GrammarKit plugin
• generate the lexer by pressing cmd-shift-g on ElmLexer.flex
• generate the parser by pressing cmd-shift-g on ElmParser.bnf

Attribution

This project heavily leverages the open-source work of other IntelliJ plugin developers:

• Code organization and testing utils based on the Rust plugin for IntelliJ.
• Lexer and Parser originally from Kamil Durkiewicz's elm-intellij-plugin.
• Offside-rule Lexer originally based on code from Alexander Kiel's idea-haskell plugin.

Thank you Kamil, Alexander, and the Rust plugin developers.

Donation

If this plugin improves your Elm development experience, and you want to give back, please consider making a donation (tax-deductible in the US) to the Narmada Vidya Peeth school in Jabalpur, India. This school provides a completely free education to 550 boys and girls, from ages 5 to 17. I have visited the school three times since 2012, and I can vouch for the worthiness of the cause.

Alternatively consider making donations to your favorite open-source developers and projects.