Global way of dealing with global JavaScript symbols

### Description

I have a large web app that has many JavaScript files. Some of those files are classes that define global utility functions that I use everywhere. NetBeans doesn't recognize those global symbols because things are loaded in a complex way. NetBeans wants me to declare the global symbols in each JavaScript file in the form:

/* global mysymbol */

Rather than declaring those symbols global in hundreds of JavaScript files, can't I just do those declarations in one place?

### Use case/motivation

_No response_

### Related issues

_No response_

### Are you willing to submit a pull request?

No

### Code of Conduct

Yes

No repository file, test, or entry point is named. Start by tracing how NetBeans handles /* global ... */ declarations for JavaScript files and where project-wide settings are defined. Done means a user can declare global symbols once and have them recognized across the project.

Written by the indexing model from the issue text.