.eslintrc.json

{
    "env": {
        "browser": false,
        "es6": true,
        "node": true
    },
    "extends": [
        "airbnb-base"
    ],
    "rules": {
        // indentation
        "indent": ["error", 4, {"SwitchCase": 1}],
        "import/extensions": ["error", "never"],
        "import/no-extraneous-dependencies": ["warn"],
        "no-underscore-dangle": "off",

        // removed functions from comma-dangle, as it gets in the way of
        // splitting long lines with a single param such as an aray filter() callback
        "comma-dangle": ["error", {
            "arrays": "always-multiline",
            "objects": "always-multiline",
            "imports": "always-multiline",
            "exports": "always-multiline",
            "functions": "only-multiline"
        }],

        // prefer not using default exports so tree shaking can work
        // good rules, but make them warnings
        "no-undef": "warn",
        // turned off this because at this stage in the project it's useful
        "no-unused-vars": "off",
        "object-curly-spacing": ["error", "never"],
        "no-multiple-empty-lines": ["error", {"max": 1, "maxEOF": 0, "maxBOF": 0}],
        // a little wider is fine - we're not on VT80s anymore
        "max-len": ["off"],
        // use double-quotes for consistency with JSX and PHP
        "quotes": ["error", "double", "avoid-escape"],
        // code arrangement doesn't matter as webpack fixes it all during compilation
        "no-use-before-define": ["off"],
        // this is a console app
        "no-console": ["off"],
        // make it meaningful
        "prefer-const": "error",
        // Makes defining types from props painful with typescript, so off it goes
        "prefer-destructuring": "off"
    }
}