ESLintのセットアップ方法(Mac)

$ npm install --save-dev eslint

$ npx eslint --init

? How would you like to use ESLint? (Use arrow keys)
  To check syntax only
❯ To check syntax and find problems
  To check syntax, find problems, and enforce code style

? What type of modules does your project use? (Use arrow keys)
❯ JavaScript modules (import/export)
  CommonJS (require/exports)
  None of these

? Which framework does your project use? (Use arrow keys)
❯ React
  Vue.js
  None of these

? Does your project use TypeScript? (y/N)

? Where does your code run?
❯◉ Browser
 ◯ Node

? How would you like to define a style for your project? (Use arrow keys)
❯ Use a popular style guide
  Answer questions about your style
  Inspect your JavaScript file(s)

? Which style guide do you want to follow? (Use arrow keys)
❯ Airbnb: https://github.com/airbnb/javascript
  Standard: https://github.com/standard/standard
  Google: https://github.com/google/eslint-config-google

? What format do you want your config file to be in? (Use arrow keys)
❯ JavaScript
  YAML
  JSON

@typescript-eslint/eslint-plugin@latest eslint-config-standard@latest eslint@>=6.2.2 eslint-plugin-import@>=2.18.0 eslint-plugin-node@>=9.1.0 eslint-plugin-promise@>=4.2.1 eslint-plugin-standard@>=4.0.0 @typescript-eslint/parser@latest
? Would you like to install them now with npm? (Y/n)

$ npx eslint --init
? How would you like to use ESLint? To check syntax, find problems, and enforce code style
? What type of modules does your project use? CommonJS (require/exports)
? Which framework does your project use? None of these
? Does your project use TypeScript? Yes
? Where does your code run? Browser, Node
? How would you like to define a style for your project? Use a popular style guide
? Which style guide do you want to follow? Standard: https://github.com/standard/standard
? What format do you want your config file to be in? YAML
Checking peerDependencies of eslint-config-standard@latest
The config that you've selected requires the following dependencies:

@typescript-eslint/eslint-plugin@latest eslint-config-standard@latest eslint@>=6.2.2 eslint-plugin-import@>=2.18.0 eslint-plugin-node@>=9.1.0 eslint-plugin-promise@>=4.2.1 eslint-plugin-standard@>=4.0.0 @typescript-eslint/parser@latest
? Would you like to install them now with npm? Yes
Installing @typescript-eslint/eslint-plugin@latest, eslint-config-standard@latest, eslint@>=6.2.2, eslint-plugin-import@>=2.18.0, eslint-plugin-node@>=9.1.0, eslint-plugin-promise@>=4.2.1, eslint-plugin-standard@>=4.0.0, @typescript-eslint/parser@latest
npm WARN [email protected] requires a peer of acorn@^6.0.0 || ^7.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN [email protected] No repository field.
npm WARN [email protected] No license field.

+ [email protected]
+ [email protected]
+ [email protected]
+ [email protected]
+ [email protected]
+ [email protected]
+ @typescript-eslint/[email protected]
+ @typescript-eslint/[email protected]
added 44 packages from 23 contributors, updated 2 packages and audited 1756085 packages in 18.34s

17 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

Successfully created .eslintrc.yml file in {プロジェクトのルートフォルダ}

env:
  browser: true
  commonjs: true
  es6: true
  node: true
extends:
  - standard
globals:
  Atomics: readonly
  SharedArrayBuffer: readonly
parser: '@typescript-eslint/parser'
parserOptions:
  ecmaVersion: 2018
plugins:
  - '@typescript-eslint'
rules: {}

rules: {
+ "no-unused-vars": "off",
+ "@typescript-eslint/no-unused-vars": ["error", {
+   "vars": "all",
+   "args": "after-used",
+   "ignoreRestSiblings": false
+ }] 
}