https://www.softlookup.com/tutorial/JavaScript/data-types.asp
JavaScript Data Types for Beginners - Softlookup
Understand strings, numbers, booleans, arrays, objects, null, and undefined.
javascript data typesfor beginnerssoftlookup
https://www.w3schools.com/js/js_datatypes.asp
JavaScript Data Types
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML...
javascript data types
https://www.w3docs.com/learn-javascript/javascript-data-types.html
JavaScript Data Types | W3Docs
I did a quick search for more information and here's what I discovered.
javascript data types