My config file for ESLint:
{
"parserOptions": {
"ecmaVersion": 6
},
"env": {
"browser": true,
"node": true,
"es6": true,
"worker": true,
"jquery": true,
"serviceworker": true
},
"rules": {
"semi": "error",
"no-console": "warn",
"no-alert": "warn",
"quotes": ["error", "double"],
"eol-last": ["error"],
"indent": ["error", 4],
"no-use-before-define": "error",
"constructor-super": "error",
"for-direction": "error",
"getter-return": "error",
"no-case-declarations": "error",
"no-class-assign": "error",
"no-compare-neg-zero": "error",
"no-cond-assign": "error",
"no-const-assign": "error",
"no-constant-condition": "error",
"no-control-regex": "error",
"no-debugger": "error",
"no-delete-var": "error",
"no-dupe-args": "error",
"no-dupe-class-members": "error",
"no-dupe-keys": "error",
"no-duplicate-case": "error",
"no-empty": "error",
"no-empty-character-class": "error",
"no-empty-pattern": "error",
"no-ex-assign": "error",
"no-extra-boolean-cast": "error",
"no-extra-semi": "error",
"no-fallthrough": "error",
"no-func-assign": "error",
"no-global-assign": "error",
"no-inner-declarations": "error",
"no-invalid-regexp": "error",
"no-irregular-whitespace": "error",
"no-mixed-spaces-and-tabs": "error",
"no-new-symbol": "error",
"no-obj-calls": "error",
"no-octal": "error",
"no-prototype-builtins": "error",
"no-redeclare": "error",
"no-regex-spaces": "error",
"no-self-assign": "error",
"no-shadow-restricted-names": "error",
"no-sparse-arrays": "error",
"no-this-before-super": "error",
"no-undef": "error",
"no-unexpected-multiline": "error",
"no-unreachable": "error",
"no-unsafe-finally": "error",
"no-unsafe-negation": "error",
"no-unused-labels": "error",
"no-unused-vars": "error",
"no-useless-escape": "error",
"no-with": "error",
"require-yield": "error",
"use-isnan": "error",
"valid-typeof": "error"
}
}
Place this file (.eslintrc) in the root folder of project directory.