drop-em-dash-eslint

name: drop-em-dash-eslint description: >- Configures and applies eslint-plugin-drop-em-dash to forbid Unicode em dash (U+2014, —) in source and autofix to hyphen-minus (-). Use when the user mentions em dash, en dash vs em dash, typography in code, ASCII-friendly punctuation, eslint rule for dashes, or paste accidents with special dashes.

Drop em dash (ESLint)

What it does

• Package: eslint-plugin-drop-em-dash (repo)
• Rule: drop-em-dash/drop-em-dash — reports literal U+2014 anywhere in a parsed file (code, comments, strings).
• Autofix: each — → - (hyphen-minus). Run eslint . --fix or fix in the editor.
• Does not flag en dash (U+2013), slashes, or existing ASCII hyphens.

Install

npm install --save-dev eslint eslint-plugin-drop-em-dash

Peer: eslint >= 8.57.

Flat config (ESLint 9)

import dropEmDash from 'eslint-plugin-drop-em-dash';

export default [...dropEmDash.configs['flat/recommended']];

Manual:

import dropEmDash from 'eslint-plugin-drop-em-dash';

export default [
  {
    plugins: { 'drop-em-dash': dropEmDash },
    rules: { 'drop-em-dash/drop-em-dash': 'error' },
  },
];

Legacy .eslintrc

{
  "extends": ["plugin:drop-em-dash/recommended"]
}

Verify

npx eslint . --max-warnings 0
npx eslint . --fix

When editing this plugin repo

• Rule implementation: lib/rules/drop-em-dash.js
• Plugin entry + presets: lib/index.js
• Tests: tests/drop-em-dash.test.js, tests/integration-eslint.test.js, fixtures under tests/fixtures/

References

• Docs mirror: https://oleg-koval.github.io/drop-em-dash-eslint-rule/
• ESLint plugins: https://eslint.org/docs/latest/extend/plugins