.eslintrc.json

{
    "root": true,

    "plugins": [
        "eslint-comments",
        "jest",
        "jest-formatting",
        "jquery",
        "no-only-tests",
        "optimize-regex",
        "prefer-arrow",
        "prefer-object-spread",
        "prettier",
        "promise",
        "simple-import-sort",
        "unicorn",
        "you-dont-need-lodash-underscore"
    ],
    "extends": [
        "eslint:recommended",
        "plugin:eslint-comments/recommended",
        "plugin:jest/recommended",
        "plugin:jest-formatting/recommended",
        "plugin:jquery/deprecated",
        "plugin:optimize-regex/recommended",
        "plugin:promise/recommended",
        "plugin:unicorn/recommended",
        "plugin:you-dont-need-lodash-underscore/compatible"
    ],
    "rules": {
        "no-console": "error",
        "no-alert": "error",
        "no-var": "error",
        "no-use-before-define": "error",
        "prefer-rest-params": "error",
        "prefer-const": "error",
        "prefer-spread": "error",
        "no-only-tests/no-only-tests": "error",
        "prefer-arrow/prefer-arrow-functions": "error",
        "prefer-object-spread/prefer-object-spread": "error",
        "simple-import-sort/imports": "error",
        "prettier/prettier": "error"
    },
    "overrides": [
        {
            "files": "*.js",
            "parser": "espree",
            "env": { "node": true }
        },
        {
            "files": "**/*.ts",
            "parser": "@typescript-eslint/parser",
            "parserOptions": {
                "project": ["tsconfig.json", "tests/tsconfig.json"]
            },
            "plugins": ["@typescript-eslint"],
            "extends": [
                "plugin:@typescript-eslint/recommended",
                "plugin:@typescript-eslint/recommended-requiring-type-checking"
            ]
        }
    ]
}