.eslintrc

{
    "env": {
        "es6": true,
        "node": true,
        "jest": true
    },
    "extends": [
        "eslint:recommended",
        "airbnb-base"
    ],
    // reference: http://eslint.org/docs/rules/
    "rules": {
        // set "indent" space to 4
        "indent": [
            "error",
            4,
            { "SwitchCase": 1 }
        ],
        // show warning when writing console in code
        "no-console": 1,
        // arrow function is not forced to use in callback
        "prefer-arrow-callback": 0,
        // not force to naming function all the time
        "func-names": 0,
        // disable "global-require" restriction
        "global-require": 0,
        // disable "no-underscore-dangle" 
        "no-underscore-dangle": 0,
        // disable "object-shorthand" for better readability
        "object-shorthand": ["error", "never"],
        // disable "newline-per-chained-call" for promise chain style
        "newline-per-chained-call": 0,
        // due to the indent space, it is 4, please check the above setting, overwrite the original 100 limitation
        "max-len": ["error", 120, 2, {
            "ignoreUrls": true,
            "ignoreComments": false,
            "ignoreRegExpLiterals": true,
            "ignoreStrings": true,
            "ignoreTemplateLiterals": true
        }]
    }
}