Bag of Holding V2 Eslint Setup

.eslintrc.cjs

module.exports = {
	root: true,
	parser: "@typescript-eslint/parser",
	extends: [
		"eslint:recommended",
		"plugin:@typescript-eslint/recommended",
		"airbnb-base",
		"airbnb-typescript/base",
		"plugin:jest/recommended",
		"plugin:sonarjs/recommended",
		"plugin:promise/recommended",
		"prettier",
	],
	plugins: [
		"svelte3",
		"@typescript-eslint",
		"import",
		"jest",
		"promise",
		"sonarjs",
		"prefer-arrow",
	],
	ignorePatterns: ["*.cjs", "svelte.config.js", "cypress/**/*.js"],
	overrides: [
		{
			files: ["*.svelte"],
			processor: "svelte3/svelte3",
			rules: {
				"import/prefer-default-export": "off",
				"import/no-mutable-exports": "off",
			},
		},
		{
			files: ["**/index.ts"],
			rules: {
				"no-restricted-exports": "off",
			},
		},
	],
	settings: {
		"svelte3/typescript": () => require("typescript"),
	},
	parserOptions: {
		sourceType: "module",
		ecmaVersion: 2020,
		project: ["./tsconfig.json", "./cypress/tsconfig.json"],
		tsconfigRootDir: __dirname,
		extraFileExtensions: [".svelte"],
	},
	env: {
		browser: true,
		es2017: true,
		node: true,
	},
	rules: {
		"prefer-arrow/prefer-arrow-functions": [
			"error",
			{
				disallowPrototype: true,
				singleReturnOnly: false,
				classPropertiesAllowed: false,
			},
		],
	},
};

README.md

1. Set the version for eslint in dev dependencies too 7.3.0^ and run yarn
2. Run npx install-peerdeps --dev eslint-config-airbnb-base
3. Run yarn add --dev eslint-config-airbnb-typescript eslint-plugin-jest eslint-plugin-promise eslint-plugin-sonarjs eslint-plugin-prefer-arrow
4. Copy in the contents of this Gist's eslint config file