typescript-eslint VS eslint-plugin-import

Typescript-eslint can assist in this task. This tool helps identify all instances of unsafe any usage. Specifically, all usages of JSON.parse can be found and it can be ensured that the received data's format is checked. More about getting rid of the any type in a codebase can be read in the article Making TypeScript Truly "Strongly Typed".

> Only lint files that have changed? How hard that is?

Quite hard, especially since type-aware rules from e.g. https://typescript-eslint.io/ mean that changing the type of a variable in file A can break your code in file B, even if file B hasn't changed.

The article only touches this: when converting to TypeScript, `any` is useful, but in the end you don't want this type in your codebase - so don't forget to use typescript-eslint [0] and turn on those no-unsafe-* rules which guard against `any` leaking into your code.

[0] https://github.com/typescript-eslint/typescript-eslint

By convention, React components should be named in PascalCase. @typescript-eslint has the config we need, and though we can't specifically target React components, we can target variables (and set some other conventions while we're at it):

no-unresolved https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-unresolved.md

module.exports = { extends: 'erb', rules: { // A temporary hack related to IDE not resolving correct package.json 'import/no-extraneous-dependencies': 'off', 'import/no-unresolved': 'error', // Since React 17 and typescript 4.1 you can safely disable the rule 'react/react-in-jsx-scope': 'off', // custom overrides 'global-require': 'off', 'class-methods-use-this': 'off', 'promise/always-return': 'off', 'import/order': 'warn', 'import/prefer-default-export': 'off', 'jsx-a11y/media-has-caption': 'off', 'spaced-comment': 'off', 'jsx-a11y/label-has-associated-control': [ 'error', { required: { some: ['nesting', 'id'], }, }, ], 'jsx-a11y/label-has-for': [ 'error', { required: { some: ['nesting', 'id'], }, }, ], '@typescript-eslint/ban-ts-comment': 'off', 'prettier/prettier': 'off', }, plugins: ['prettier'], parserOptions: { ecmaVersion: 2020, sourceType: 'module', project: './tsconfig.json', tsconfigRootDir: __dirname, createDefaultProgram: true, }, settings: { 'import/resolver': { // See https://github.com/benmosher/eslint-plugin-import/issues/1396#issuecomment-575727774 for line below node: {}, webpack: { config: require.resolve('./.erb/configs/webpack.config.eslint.ts'), }, typescript: {}, }, 'import/parsers': { '@typescript-eslint/parser': ['.ts', '.tsx'], }, }, };

eslint-plugin-import