.eslintrc.json

{
    "env": {
        "browser": true,
        "commonjs": true,
        "mocha": true,
        "es6": true,
        "node": true
    },
    "ignorePatterns": [
        "dist/*",
        "node_modules/*",
        "legacy/*",
        "webpack.*"
    ],
    "extends": [
        "eslint:recommended",
        "plugin:react/recommended"
    ],
    "settings": {
        "react": {
            "version": "latest"
        }
    },
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": [
        "react"
    ],
    "rules": {
        "indent": [ "error", 4 ],
        "linebreak-style": [ "error","unix" ],
        "quotes": [ "error","single" ],
        "semi": [ "error","always" ],
        "brace-style": [ "error","allman" ],
        "object-curly-newline": [ "error", { "consistent": true } ],
        "object-curly-spacing": [ "error", "always" ],
        "array-bracket-spacing": [ "error", "always" ],
        "eol-last": [ "error", "always" ],
        "no-multiple-empty-lines": [ "error", { "max": 1, "maxEOF": 1 } ],
        "lines-around-comment": [ "error", { "beforeBlockComment": true, "beforeLineComment": true } ]
    }
}