.eslintrc.json

{
  "root": true,
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "airbnb-base",
    "airbnb-typescript/base",
    "prettier"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.json"
  },
  "plugins": ["@typescript-eslint"],
  "rules": {
    "semi": [2, "always"],
    "class-methods-use-this": "warn",
    "@typescript-eslint/explicit-member-accessibility": "off",
    "@typescript-eslint/explicit-function-return-type": "off",
    "import/no-anonymous-default-export": [2, { "allowArrowFunction": true }]
  },
  "overrides": [
    {
      "files": ["*.ts", "*.tsx"],
      "rules": {
        "@typescript-eslint/explicit-function-return-type": [
          "error",
          { "allowExpressions": true }
        ],
        "@typescript-eslint/explicit-member-accessibility": [
          "error",
          {
            "accessibility": "no-public",
            "overrides": { "properties": "off" }
          }
        ],
        "@typescript-eslint/no-non-null-assertion": "error"
      }
    }
  ]
}