My custom ESLint + Standard rules

.eslintignore

/.nyc_output
/.vscode
/coverage
/node_modules
/tests/fixtures
/tests/integrations/*/node_modules

.eslintrc.json

{
  "env": {
    "node": true,
    "es6": true
  },
  "extends": "standard",
  "rules": {
    "array-bracket-spacing": [
      "error",
      "always"
    ],
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "max-len": [
      "error",
      {
        "code": 132,
        "ignoreUrls": true,
        "ignoreStrings": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true
      }
    ],
    "no-unused-vars": [
      "error",
      {
        "vars": "all",
        "args": "after-used",
        "ignoreRestSiblings": false
      }
    ]
  }
}

Usage:

Install ESLint and Standard dependencies:

yarn add \
  eslint \
  eslint-config-standard \
  eslint-plugin-standard \
  eslint-plugin-promise \
  eslint-plugin-import \
  eslint-plugin-node \
  --dev

Automatic lint your files:
Add to your package.json scripts:

"lint": "eslint ."

VS Code with auto formatting (ctrl + s)
Install vscode-eslint extension and then add to your settings.json:

"editor.formatOnSave": true,
"eslint.autoFixOnSave": true