.eslintrc

{
  "env": {
    "browser": true,
    "es2021": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:react-hooks/recommended",
    "plugin:import/recommended",
    "plugin:import/typescript",
    "@spotify/eslint-config-base",
    "@spotify/eslint-config-react"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 12,
    "sourceType": "module"
  },
  "plugins": ["prettier", "react", "@typescript-eslint", "jsx-a11y", "fp"],
  "rules": {
    "fp/no-mutation": ["error", { "allowThis": true }],
    "arrow-body-style": "warn",
    "import/newline-after-import": ["error", { "count": 1 }],
    // conflict with ts path
    "import/no-unresolved": "off",
    // not useful for react fc
    "@typescript-eslint/explicit-module-boundary-types": "off",

    // sometime need console for debugging
    "no-console": ["warn", { "allow": ["warn", "error"] }],
    // styled component need to be at the bottom of file
    "no-use-before-define": "off",
    "@typescript-eslint/no-use-before-define": "off",
    // lot of api response not using camel case
    "camelcase": "off",
    "no-nested-ternary": "off",
    "jsx-a11y/click-events-have-key-events": "off",
    "consistent-return": "off",

    // a11y rule
    "jsx-a11y/no-onchange": "off",
    "jsx-a11y/no-autofocus": "off",
    "jsx-a11y/no-noninteractive-element-interactions": "off",

    // use prettier for code style
    "comma-dangle": "off",
    "semi": "off",
    "no-extra-semi": "off",
    "indent": "off",
    "@typescript-eslint/no-extra-semi": "off",
    "no-spaced-func": "off",
    "prettier/prettier": "error",
    "comma-spacing": "off",

    // use typescript-eslint rule instead
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": "error",
    "no-shadow": "off",
    "@typescript-eslint/no-shadow": "error",
    "no-useless-constructor": "off",
    "@typescript-eslint/no-useless-constructor": "error",

    // custom rules
    "max-depth": ["error", 3],
    // should use `String(var)` instead of `'' + var` for type convert
    "no-implicit-coercion": "error",
    "no-shadow-restricted-names": "error",
    "prefer-arrow-callback": "error",
    // do not use `let` unless need to reassign
    "prefer-const": "error",
    // must add new line between statement
    "padding-line-between-statements": [
      "error",
      {
        "blankLine": "always",
        "prev": [
          "block",
          "block-like",
          "cjs-export",
          "class",
          "export",
          "import",
          "multiline-const",
          "multiline-expression"
        ],
        "next": "*"
      },
      {
        "blankLine": "any",
        "prev": ["export", "import"],
        "next": ["export", "import"]
      }
    ],

    // react rules
    // no longer needed in react 17 with td
    "react/jsx-uses-react": "off",
    "react/react-in-jsx-scope": "off",
    // force fc style
    "react/function-component-definition": [
      "error",
      { "namedComponents": "arrow-function" }
    ],
    // avoid accidentally using default type=submit which will reload the page
    "react/button-has-type": "error",
    // avoid accidentally using default type=submit which will reload the page
    "react/jsx-key": "error",
    // must not use index as key
    "react/no-array-index-key": "error",
    // this.props and this.state may be updated asynchronously, you should not rely on their values for calculating the next state
    // see https://medium.com/@wisecobbler/using-a-function-in-setstate-instead-of-an-object-1f5cfd6e55d1
    "react/no-access-state-in-setstate": "error",
    // must not use dangerouslySetInnerHTML
    "react/no-danger": "error",
    // no deprecated react features
    "react/no-deprecated": "error",
    "react/no-is-mounted": "error",
    "react/no-find-dom-node": "error",
    "react/no-render-return-value": "error",
    "react/no-string-refs": "error",
    // never mutate state directly
    "react/no-direct-mutation-state": "error",
    // avoid typo on default static class properties and lifecycle methods
    "react/no-typos": "error",
    // do not allow using `this` in functional component
    "react/no-this-in-sfc": "error",
    // avoid typo
    "react/no-unescaped-entities": "error",
    // avoid typo on property name
    "react/no-unknown-property": "error",
    // should clean up unused props and states
    "react/no-unused-prop-types": "error",
    "react/no-unused-state": "error",
    // make sure render function return sth
    "react/require-render-return": "error",
    // sort lifecycle method for readability
    "react/sort-comp": "error",
    // avoid wrong html
    "react/void-dom-elements-no-children": "error",
    // prefer functional component if no lifecycle, state and event handlers
    "react/prefer-stateless-function": [
      "error",
      { "ignorePureComponents": false }
    ]
  }
}