eslint-plugin-es-x

ESLint plugin that disallows individual ECMAScript syntactic features from ES3 to upcoming proposals. Version 9.6.0 requires ESLint >=9.29.0 and Node.js ^20.19.0 || >=22.12.0. Actively maintained by eslint-community as a fork of the deprecated eslint-plugin-es. Provides 128+ granular rules to restrict specific syntax (e.g., BigInt, optional chaining, top-level await) with readable error messages. Ships TypeScript type declarations, flat config support, and predefined configs like 'no-new-in-es2023'. Unlike setting ecmaVersion in Espree, this plugin allows selective feature bans and gives clear feedback for restricted syntax.