.eslintrc.js

module.exports = {
  parser: "@typescript-eslint/parser", // Specifies the ESLint parser
  parserOptions: {
    ecmaVersion: 2018, // Allows for the parsing of modern ECMAScript features
    sourceType: "module", // Allows for the use of imports
    project: ["./tsconfig.json", "./tsconfig.eslint.json"],
  },
  extends: [
    "plugin:@typescript-eslint/recommended", // Uses the recommended rules from the @typescript-eslint/eslint-plugin
  ],
  plugins: [],
  rules: {
    "indent": "off",
    "@typescript-eslint/indent": [
      "error",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "@typescript-eslint/typedef": [
      "error",
      {
        "arrowParameter": true,
        "variableDeclaration": true
      }
    ],
    "quotes": [
      "error",
      "double",
      {
        "avoidEscape": true,
        "allowTemplateLiterals": true
      }
    ],
    "@typescript-eslint/no-parameter-properties": "off",
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/no-use-before-define": [
      "error",
      {
        functions: false,
        typedefs: false,
        classes: false,
      },
    ],
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        ignoreRestSiblings: true,
        argsIgnorePattern: "^_",
      },
    ],
    "@typescript-eslint/explicit-function-return-type": [
      "error",
      {
        allowExpressions: true,
        allowTypedFunctionExpressions: true,
      },
    ],
    "@typescript-eslint/no-object-literal-type-assertion": "off",
    "@typescript-eslint/interface-name-prefix": "off",
    "@typescript-eslint/no-non-null-assertion": "off", // This is necessary for Map.has()/get()!
    "no-var": "error",
    "prefer-const": "error",
    "no-trailing-spaces": "error",
    "semi": "error",
    "max-len": [
      "error",
      {
        code: 140,
      },
    ],
    "@typescript-eslint/explicit-member-accessibility": "error"
  },
  overrides: [
    {
      files: ["*.test.ts"],
      rules: {
        "@typescript-eslint/explicit-function-return-type": "off",
      },
    },
    {
      files: ["*.ts", "*.tsx"], // Your TypeScript files extension
      parserOptions: {
        project: ["./tsconfig.json"], // Specify it only for TypeScript files
      },
    },
  ],
};