ESLint plugin for Google Apps Script that defines global variables exposed by Google Apps Script environment. It does not define any linting rules.
You'll first need to install ESLint:
$ npm i eslint --save-dev
Next, install eslint-plugin-googleappsscript:
$ npm install eslint-plugin-googleappsscript --save-dev
Note: If you installed ESLint globally (using the -g flag) then you must also install eslint-plugin-googleappsscript globally.
Add googleappsscript to the plugins section of your .eslintrc
configuration file. You can omit the eslint-plugin- prefix. Also,
add googleappsscript/googleappsscript": true to env section:
{
    "plugins": [
      "googleappsscript"
    ],
    "env": {
      "googleappsscript/googleappsscript": true
    }
}