.eslintrc

{
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "lib": [ "ESNext", "DOM"]
    },
    "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"],
    "env": {
        "node": true
    },
    "rules": {
        // it will cause incorrect error in typescript
        "no-unused-vars": "off",
        "@typescript-eslint/no-unused-vars": [
          "warn",
          { 
            "argsIgnorePattern": "^_",
            "varsIgnorePattern": "^_",
            "caughtErrorsIgnorePattern": "^_"
          }
        ],
        "@typescript-eslint/consistent-type-imports": "warn"
    },
    "overrides": [
      {
        // testing file needs var require
        "files": ["*.spec.ts"],
        "rules": {
          "@typescript-eslint/no-var-requires": "off"
        }
      }
    ]
}