UXP: How to create an instance of a class from included js-file?

Hey, how’s it going.
 

UXP does not support ExtendScript preprocessor includes such as:

#include
//@include

So the usual approach is to turn the included file into a normal JavaScript module and load it with require() or import, depending on how your UXP project is set up.

// ec_general_DEV.js

class General {
    constructor(g) {
        this.g = g;
    }

    remove_trailing_linefeeds(str) {
        return String(str).replace(/[\r\n]+$/, "");
    }
}

module.exports = General;

Main UXP

const General = require("./ec_general_DEV.js");

const g = {};
const INST_gene = new General(g);

const general_txt =
    INST_gene.remove_trailing_linefeeds(g.source_PI.rows[39].cells[1].contents) + "\r";

Also, these are ExtendScript-only, so they will not work the same way in UXP

#target indesign
#include
//@include

UXP files should generally be .js rather than .jsx, and the module should usually reference relatively from inside the UXP plugin/script folder

require("./ec_general_DEV.js");

rather than from an absolute system path such as:

/Library/Scripts/Adobe Automation/ec_general_DEV.jsx