.eslintrc.json

{
  "$schema": "https://json.schemastore.org/eslintrc.json",
  "ignorePatterns": "",
  "env": {
    "browser": true
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 6,
    "project": "./tsconfig.json"
  },
  "plugins": [
    "@typescript-eslint"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking"
  ],
  "rules": {
    "@typescript-eslint/explicit-function-return-type": "warn",
    "@typescript-eslint/no-misused-promises": ["error", { "checksVoidReturn": false }],
    "arrow-parens": [ "error", "as-needed" ],
    "arrow-spacing": "error",
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    "dot-notation": "error",
    "eqeqeq": "error",
    "func-call-spacing": "error",
    "indent": ["error", 4, { "SwitchCase": 1 }],
    "keyword-spacing": "error",
    "no-alert": "error",
    "no-console": ["error", { "allow": ["error"] }],
    "no-implicit-coercion": "error",
    "no-loop-func": "error",
    "no-multi-spaces": "error",
    "no-multi-str": "error",
    "no-multiple-empty-lines": "error",
    "no-param-reassign": "error",
    "no-tabs": "error",
    "no-trailing-spaces": "error",
    "no-undefined": "error",
    "no-unneeded-ternary": "error",
    "no-unused-expressions": "error",
    "no-var": "error",
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "quotes": [2, "single", { "avoidEscape": true }],
    "require-await": "error",
    "semi": "error"
  }
}