Base ESLint config

.eslintrc.json

{
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true,
        "node": false
    },
    "parser": "@babel/eslint-parser",
    "parserOptions": {
        "ecmaVersion": 2018,
        "ecmaFeatures": {
            "jsx": true
        },
        "sourceType": "module"
    },
    "settings": {
        "react": {
            "version": "detect"
        }
    },
    "plugins": [
        "react"
    ],
    "extends": [
        "eslint:recommended",
        "plugin:react/recommended"
    ],
    "rules": {
        "indent": ["warn", 4, {"SwitchCase": 1}],
        "brace-style": ["warn", "1tbs"],
        "semi": ["error", "always"],
        "curly": ["warn", "all"],
        "arrow-parens": ["warn", "as-needed"],
        "comma-dangle": ["warn", "only-multiline"],
        "space-before-blocks": ["warn", "always"],
        "space-before-function-paren": ["warn", {
            "anonymous": "never",
            "named": "never",
            "asyncArrow": "always"
        }],
        "arrow-spacing": ["warn", {
            "before": true,
            "after": true
        }],
        "keyword-spacing": ["warn", {
            "before": true,
            "after": true
        }],
        "constructor-super": "warn",
        "valid-typeof": "warn",
        "no-const-assign": "warn",
        "no-this-before-super": "warn",
        "no-undef": "error",
        "no-undefined": "error",
        "no-undef-init": "error",
        "no-unreachable": "warn",
        "no-unused-vars": ["error", { "vars": "all", "args": "none"}],
        "no-invalid-regexp": "error",
        "no-multi-spaces": "warn",
        "no-multiple-empty-lines": ["warn", {"max": 1}],
        "react/prop-types": ["error", {"ignore": ["children"]}],
        "react/jsx-uses-react": "error",
        "react/jsx-uses-vars": "error",
        "react/button-has-type": "warn",
        "react/no-typos": "error",
        "react/no-array-index-key": "warn",
        "react/no-unused-state": "warn",
        "react/no-unused-prop-types": "warn",
        "react/self-closing-comp": "warn",
        "react/sort-comp": ["warn", {
            "order": [
                "static-methods",
                "instance-variables",
                "lifecycle",
                "everything-else",
                "render"
            ]
        }],
        "react/void-dom-elements-no-children": "error",
        "react/jsx-pascal-case": "warn",
        "react/jsx-props-no-multi-spaces": "warn",
        "react/jsx-tag-spacing": ["warn", {
            "closingSlash": "never",
            "beforeSelfClosing": "never",
            "afterOpening": "never",
            "beforeClosing": "allow"
        }],
        "react/jsx-no-target-blank": "warn"
    }
}