eslint-plugin-final

ESLint plugin for enforcing @Final semantics in TypeScript classes.

Rules

• final/no-override-final: Disallow overriding methods decorated with @Final in base classes.
• final/no-final-on-abstract: Disallow @Final on abstract classes.
• final/no-extend-final: Disallow extending classes decorated with @Final.
• final/no-redundant-final-method: Disallow @Final on methods when the class is already decorated with @Final.

Install

npm install final-decorator
npm install --save-dev eslint-plugin-final

Usage (flat config)

import finalPlugin from 'eslint-plugin-final';

export default [
  {
    files: ['**/*.ts'],
    plugins: {
      final: finalPlugin,
    },
    rules: {
      ...finalPlugin.configs.recommended.rules,
    },
  },
];

Runtime Decorator

Use final-decorator in production/runtime code and keep this package as a dev dependency for linting only.