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+# eslint-plugin-es-x
+
+[![npm version](https://img.shields.io/npm/v/eslint-plugin-es-x.svg)](https://www.npmjs.com/package/eslint-plugin-es-x)
+[![Downloads/month](https://img.shields.io/npm/dm/eslint-plugin-es-x.svg)](http://www.npmtrends.com/eslint-plugin-es-x)
+[![Build Status](https://github.com/eslint-community/eslint-plugin-es-x/workflows/CI/badge.svg)](https://github.com/eslint-community/eslint-plugin-es-x/actions)
+
+ESLint plugin which disallows each ECMAScript syntax.
+
+> Forked from [eslint-plugin-es](https://github.com/mysticatea/eslint-plugin-es). As the original repository seems [no longer maintained](https://github.com/mysticatea/eslint-plugin-es/issues/72).
+
+## 🏁 Goal
+
+[Espree](https://github.com/eslint/espree#readme), the default parser of [ESLint](https://eslint.org/), has supported `ecmaVersion` option.
+However, the error messages of new syntax are not readable (e.g., "unexpected token" or something like).
+
+When we use this plugin along with the latest `ecmaVersion` option value, it tells us the readable error message for the new syntax, such as "ES2020 BigInt is forbidden."
+Plus, this plugin lets us disable each syntactic feature individually.
+
+## 📖 Usage
+
+See [documentation](https://eslint-community.github.io/eslint-plugin-es-x/)
+
+## 🚥 Semantic Versioning Policy
+
+This plugin follows [semantic versioning](http://semver.org/) and [ESLint's semantic versioning policy](https://github.com/eslint/eslint#semantic-versioning-policy).
+
+- We will release a new minor version to add new rules when TC39 decided to advance proposals to Stage 4. In the minor releases, we don't update configs.
+- We will release a new major version to update configs when new ECMAScript snapshots are available.
+
+## 📰 Changelog
+
+See [releases](https://github.com/eslint-community/eslint-plugin-es-x/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 docs:build` builds documentation.
+- `npm run docs:watch` builds documentation on each file change.
+- `npm run watch` runs tests on each file change.