.eslintrc.js

module.exports = {
    "env": {
        "es6": true,
        "browser": true
    },
    "globals": {
        "require": true,
        "module": true
    },
    // Enables rules that report common problems,
    // see http://eslint.org/docs/rules/ for list
    "extends": "eslint:recommended",
    "rules": {
        // Enforce the use of variables within the scope they are defined
        "block-scoped-var": 2,
        // Enforce camelcase naming convention
        "camelcase": 2,
        // Enforce consistent spacing before and after commas
        "comma-spacing": 2,
        // Enforce at least one newline at the end of files
        "eol-last": 2,
        // Require the use of === and !==
        "eqeqeq": [2, "smart"],
        // Enforce consistent spacing before and after keywords
        "keyword-spacing": [2, { "before": true, "after": true }],
        // Disallow multiple empty lines
        "no-multiple-empty-lines": [2, { "max": 1, "maxEOF": 1, "maxBOF": 0 }],
        // Enforce the consistent use of the radix argument when using parseInt()
        "radix": 2,
        // Require or disallow semicolons instead of AS
        "semi": 2,
        // Enforce consistent spacing before and after semicolons
        "semi-spacing": 2,
        // Enforce consistent spacing before blocks
        "space-before-blocks": 2,
        // Enforce consistent spacing inside parentheses
        // "space-in-parens": [2, "always"],
        // Enforce the consistent use of either backticks, double, or single quotes
        "quotes": [2, "single", { "avoidEscape": true, "allowTemplateLiterals": true }],
        // Enforce using tabs for indentation
        "indent": [2, "tab", { "SwitchCase": 1 }]
    },
    "parserOptions": {
        "sourceType": "module"
    },
    "extends": "react-app"
};