.eslintrc.json

{
  "env": {
    "commonjs": true,
    "es2021": true,
    "node": true,
    "mocha": true
  },
  "extends": ["eslint:recommended", "prettier"],
  "parserOptions": {
    "ecmaVersion": 12
  },
  // Typescript config
  "overrides": [
    {
      "files": ["*.ts"],
      "parser": "@typescript-eslint/parser",
      "parserOptions": { "project": "./tsconfig.json" },
      "plugins": ["@typescript-eslint", "prettier"],
      "extends": [
        "eslint:recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/eslint-recommended",
        "prettier"
      ],
      "rules": {
        "prettier/prettier": "warn",
        "@typescript-eslint/no-unused-vars": "warn",
        "@typescript-eslint/no-explicit-any": "warn",
        "@typescript-eslint/naming-convention": [
          "warn",
          {
            "selector": "default",
            "format": ["camelCase"]
          },
          {
            "selector": "variable",
            "format": ["camelCase", "UPPER_CASE"]
          },
          {
            "selector": "parameter",
            "format": ["camelCase"],
            "leadingUnderscore": "allow"
          },
          {
            "selector": ["objectLiteralProperty"],
            "format": ["camelCase", "PascalCase", "UPPER_CASE"]
          },
          {
            "selector": ["classProperty"],
            "modifiers": ["private", "static"],
            "format": ["PascalCase", "UPPER_CASE"]
          },
          {
            "selector": ["classProperty", "classMethod"],
            "modifiers": ["private"],
            "format": ["camelCase"],
            "leadingUnderscore": "require"
          },
          {
            "selector": ["classProperty", "classMethod"],
            "modifiers": ["protected"],
            "format": ["camelCase"],
            "leadingUnderscore": "require"
          },
          {
            "selector": "typeLike",
            "format": ["PascalCase"]
          },
          {
            "selector": ["enumMember"],
            "format": ["camelCase", "PascalCase"]
          },
          {
            "selector": "variable",
            "types": ["boolean"],
            "format": ["PascalCase"],
            "prefix": ["is", "should", "has", "can", "did", "will"]
          }
        ]
      }
    }
  ]
}