.eslintrc.json

{
    "extends": "eslint:recommended",
    "rules": {
        "semi": ["error", "always"],
        "quotes": ["error", "double"],
        "block-scoped-var": "error",
        "consistent-return": "error",
        "curly": "error",
        "eqeqeq": "error",
        "no-alert": "error",
        "no-caller": "error",
        "no-eval": "error",
        "no-console": "off",
        "no-invalid-this": "error",
        "no-unused-expressions": "error",
        "strict": ["error", "safe"],
        "global-require": "error",
        "array-bracket-newline": "error",
        "array-bracket-spacing": ["error", "always"],
        "brace-style": "error",
        "comma-dangle": "error",
        "comma-spacing": "error",
        "comma-style": "error",
        "func-call-spacing": "error",
        "indent": ["error", 4, {
            "SwitchCase": 1
        }],
        "key-spacing": "error",
        "new-cap": "error",
        "new-parens": "error",
        "no-lonely-if": "error",
        "no-new-object": "error",
        "no-nested-ternary": "error",
        "no-whitespace-before-property": "error",
        "semi-spacing": "error",
        "semi-style": "error",
        "space-before-blocks": "error",
        "space-before-function-paren": ["error", "never"],
        "spaced-comment": ["error", "always", {
            "exceptions": ["/"]
        }],
        "switch-colon-spacing": "error"
    },
    "parserOptions": {
        "sourceType": "module"
    },
    "env": {
        "browser": true,
        "es6": true
    }
}