JS Identifiers
Simple script that just prints out the declared variables in a JavaScript file.
Usage
Install globally to use it on the command line easily
$ npm i -g js-identifiers
$ js-identifiers some_file.js
var1
var2
var3
var4
...
Use with npx if you don't want to install it globally
$ npx js-identifiers some_file.js
License
Do whatever you want with it.