# eslint-utils

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## 🏁 Goal

This package provides utility functions and classes for make ESLint custom rules.

For examples:

- [getStaticValue](https://eslint-utils.mysticatea.dev/api/ast-utils.html#getstaticvalue) evaluates static value on AST.
- [PatternMatcher](https://eslint-utils.mysticatea.dev/api/ast-utils.html#patternmatcher-class) finds a regular expression pattern as handling escape sequences.
- [ReferenceTracker](https://eslint-utils.mysticatea.dev/api/scope-utils.html#referencetracker-class) checks the members of modules/globals as handling assignments and destructuring.

## 📖 Usage

See [documentation](https://eslint-utils.mysticatea.dev/).

## 📰 Changelog

See [releases](https://github.com/mysticatea/eslint-utils/releases).

## ❤️ Contributing

Welcome contributing!

Please use GitHub's Issues/PRs.

### Development Tools

- `npm test` runs tests and measures coverage.
- `npm run clean` removes the coverage result of `npm test` command.
- `npm run coverage` shows the coverage result of the last `npm test` command.
- `npm run lint` runs ESLint.
- `npm run watch` runs tests on each file change.