.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "jquery": true
    },
    "extends": "eslint:recommended",
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly",
        "JTSageDateBox": "writable",
        "mergeOpts": "readonly"
    },
    "parserOptions": {
        "ecmaVersion": 2018
    },
    "rules": {
        "no-multi-assign": "error",
        "one-var": ["error", "always"],
        "indent" : [
            "error",
            "tab",
            {
                "VariableDeclarator": 1,
                "ArrayExpression": "first",
                "SwitchCase": 1
            }
        ],
        "linebreak-style" : [
            "error",
            "unix"
        ],
        "quotes" : [
            "error",
            "double"
        ],
        "semi" : [
            "error",
            "always"
        ],
        "max-len" : [
            "error",
            { "code": 100 }
        ],
        "no-trailing-spaces" : [
            "error", 
            { 
                "skipBlankLines": true,
                "ignoreComments": true 
            }
        ],
        "comma-dangle" : [
            "error",
            "only-multiline"
        ],
        "key-spacing" : [
            "error", 
            {
                "beforeColon": true,
                "afterColon": true,
                "mode": "minimum"
            }
        ],
        "keyword-spacing": [
            "error", 
            {
                "before": true,
                "after": true
            }
        ]
    }
}