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For linting and formatting Ruby and JavaScript, RuboCop and ESLint are used respectively. They can be used with the following commands from the inside of a Chemotion ELN installation directory. The flags -a or -x for rubocop and --fix for ESLint are for correcting and therefore changing the code. Without the flags errors or warnings are displayed, but no changes are made to the code.

rubocop [-a | -x] [paths]
yarn run eslint [--fix] [paths]

When ESLint detects linting errors, it will finishes by default with the exit code 1. This can lead to scripts being terminated with error codes in some environments (e. g. GitHub Actions). To avoid this the eslint-plugin-only-warn can be added via yarn which returns warnings instead of errors. The plugin needs to be activated with a flag in the ESLint command:

yarn run eslint --plugin eslint-plugin-only-warn [--fix] [paths]

There are Linting extensions for Visual Studio Code available.