ESlint 설정

1. remove if you installed eslint globally $ npm uninstall eslint -g 2. install eslint extension on vscode https://marketplace.visualstudio.com/items?itemName=dbaeumer.vscode-eslint 3. install 3 packages manually, not by command on eslint installed globally, $ yarn add eslint-config-airbnb-base eslint eslint-plugin-import 4. make .eslintrc.js file and copy paste codes below

module.exports = {

    env: {

      browser: true,

      es6: true,

      node: true

    },

    extends: ["airbnb-base","prettier"],

    globals: {

      Atomics: "readonly",

      SharedArrayBuffer: "readonly"

    },

    parserOptions: {

      ecmaVersion: 2018,

      sourceType: "module"

    },

    rules: {

        "no-console": "off"

    }

  };

5. install eslint-config-prettier $yarn add eslint-config-prettier 6. go to .eslintrc.js file and change "extends" from "airbnb-base", to ["airbnb-base", "prettier"], 7. go to app.js and try save by ctrl+s then you will see red lines if eslint activates succesfully