.eslintrc.json

{
	"root": true,
	"parser": "@typescript-eslint/parser",
	"parserOptions": {
		"sourceType": "module",
		"project": true
	},
	"env": {
		"node": true
	},
	"plugins": ["@typescript-eslint", "@stylistic"],
	"extends": [
		"eslint:recommended",
		"plugin:@typescript-eslint/eslint-recommended",
		"plugin:@typescript-eslint/strict-type-checked",
		"plugin:@typescript-eslint/stylistic-type-checked",
		"plugin:@stylistic/recommended-extends"
	],
	"rules": {
		"@typescript-eslint/explicit-function-return-type": [
			"error",
			{ "allowExpressions": true }
		],
		"@typescript-eslint/no-non-null-assertion": "off",
		"@typescript-eslint/restrict-template-expressions": [
			"error",
			{ "allowNumber": true }
		],
		"@typescript-eslint/prefer-nullish-coalescing": [
			"error",
			{ "ignoreConditionalTests": true }
		],
		"@stylistic/max-len": ["warn", 120, { "ignoreStrings": true }],
		"@stylistic/indent": ["warn", 4],
		"@stylistic/member-delimiter-style": [
			"warn",
			{
				"multiline": {
					"delimiter": "semi",
					"requireLast": true
				}
			}
		],
		"@stylistic/semi": ["warn", "always"],
		"@stylistic/quotes": ["warn", "double", { "avoidEscape": true }],
		"@stylistic/brace-style": ["warn", "1tbs", { "allowSingleLine": true }],
		"@stylistic/arrow-parens": ["warn", "as-needed"],
		"@stylistic/max-statements-per-line": ["warn", { "max": 2 }],
		"@stylistic/comma-dangle": ["warn", "never"],
		"@stylistic/no-mixed-operators": "warn"
	}
}