.eslintrc.js

module.exports = {
	root: true,
	parser: '@typescript-eslint/parser',
	parserOptions: {
		tsconfigRootDir: __dirname,
		project: ['./tsconfig.json'],
	},
	plugins: [
		'@typescript-eslint',
	],
	extends: [
		'eslint:recommended',
		'plugin:@typescript-eslint/recommended',
	],
	rules: {
		'indent': ['error', 'tab', {
			'SwitchCase': 1,
			'MemberExpression': 'off',
			'flatTernaryExpressions': true,
			'ArrayExpression': 'first',
			'ObjectExpression': 'first',
		}],
		'eol-last': ['error', 'always'],
		'semi': ['error', 'always'],
		'quotes': ['error', 'single'],
		'comma-dangle': ['error', 'always-multiline'],
		'keyword-spacing': ['error', {
			'before': true,
			'after': true,
		}],
		'key-spacing': ['error', {
			'beforeColon': false,
			'afterColon': true,
		}],
		'space-infix-ops': ['error'],
		'space-before-blocks': ['error', 'always'],
		'object-curly-spacing': ['error', 'always'],
		'nonblock-statement-body-position': ['error', 'beside'],
		'eqeqeq': ['error', 'always', { 'null': 'ignore' }],
		'no-multiple-empty-lines': ['error', { 'max': 1 }],
		'no-multi-spaces': ['error'],
		'no-var': ['error'],
		'prefer-arrow-callback': ['error'],
		'no-throw-literal': ['error'],
		'no-param-reassign': ['warn'],
		'no-constant-condition': ['warn'],
		'no-empty-pattern': ['warn'],
		'@typescript-eslint/no-unnecessary-condition': ['error'],
		'@typescript-eslint/no-inferrable-types': ['warn'],
		'@typescript-eslint/no-non-null-assertion': ['warn'],
		'@typescript-eslint/explicit-function-return-type': ['warn'],
		'@typescript-eslint/no-misused-promises': ['error', {
			'checksVoidReturn': false,
		}],
		'@typescript-eslint/consistent-type-imports': 'error',
	},
};