Is there a jcript method for checking if an array has a certain element in it?

[tbone]

Also maybe read this, covering some JScript / javascript differences / basics here as well:

How to start learning JScript?

JScript is ECMAScript 5 (ES5) compliant as far as I know, modern Javascript is ES6+ It makes sense to specifically look into ES5 vs ES6+ differences to better understand why specific things don't work in JScript and at the same time, what would still…