.eslintrc.json

{
  "env": {
    "browser": true,
    "commonjs": true,
    "es2021": true
  },
  "extends": [
    "standard-with-typescript",
    "eslint:recommended",
    "prettier",
    "plugin:security/recommended"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": "latest",
    "sourceType": "module",
    "tsconfigRootDir": "./",
    "project": ["./tsconfig.json"]
  },
  "plugins": ["@typescript-eslint"],
  "rules": {
    "comma-dangle": ["error", "always-multiline"],
    "eol-last": ["error", "always"],
    "indent": ["error", 2], // for 2 space
    "linebreak-style": ["error", "unix"],
    "semi": ["error", "never"],
    "sort-imports": [
      "error",
      {
        "allowSeparatedGroups": true,
        "ignoreDeclarationSort": true,
        "memberSyntaxSortOrder": ["all", "single", "multiple", "none"]
      }
    ],
    "sort-keys": 0,
    "quotes": [
      "error",
      "single",
      {
        "avoidEscape": true
      }
    ],
    "no-unused-vars": "error",
    "consistent-return": 1,
    "no-else-return": 2,
    "space-unary-ops": 2,
    "@typescript-eslint/strict-boolean-expressions": [
      2,
      {
        "allowString": false,
        "allowNumber": false
      }
    ],
    "@typescript-eslint/explicit-function-return-type": "off"
  },
  "overrides": [
    {
      // enable the rule specifically for TypeScript files
      "files": ["*.ts", "*.tsx"],
      "rules": {
        "@typescript-eslint/explicit-function-return-type": "error"
      }
    }
  ]
}