Dead code search tool

Reports unused exports in JS/TS files.

Supports both ES and CommonJS modules out of the box.

Only relative import paths are supported at the moment.

Usage

In a project's root, run:

$ npx @veikkosuhonen/no-dead-code

Example output

src/client/util/common.js: Unused exports: colors, CONFIG_NAME
src/client/pages/FeedbackTarget/tabs/Results/QuestionResults/utils.js: Unused exports: countAverage, countStandardDeviation, countMedian

Caveats

no-dead-code is far from complete, that's why its "best effort". The goal is to cover most typical coding standards, but it will inevitably output false positives and miss unused exports.

ES modules

Only import & export declarations are supported. Call expressions (dynamic imports) are not.

CommonJS

Tracking all require-calls and module.exports assignments is a lot of effort, so only typical use cases are covered.

The following are seen by no-dead-code:

module.exports = foo // sees "default" exported. 

module.exports = { // "foo" and "bar" are seen exported
    foo,
    bar,
}

const foo = require('./foo') // everything imported from './foo'

const {
    foo,
    bar,
} = require('./foo') // "foo" and "bar" imported from './foo'

require('./foo')() // everything imported from './foo'

someFunction(require('./foo')) // everything imported from './foo'

Todo

• Formatted & colored output
• CLI options for includes/excludes/file extensions
• Path aliases
• Absolute paths
• Dynamic imports
• Deeper usage search