XML to JSON Conversion Issue - defining multiple schemas

Question

I want to build a data converter for XML to JSON, dealing with weather files. Those weather files have multiple 'include' and 'import' and 'schemas', and I want to know how to deal with these using xml4js, or some other javascript library.

This is one example of my xsd files. As you can see there, it has include for schema location and several imports:

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns:iwxxm="http://icao.int/iwxxm/3.0" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:aixm="http://www.aixm.aero/schema/5.1.1" xmlns="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://icao.int/iwxxm/3.0" version="3.0.0">
    <include schemaLocation="./common.xsd"/>
    <import namespace="http://www.aixm.aero/schema/5.1.1" schemaLocation="http://www.aixm.aero/schema/5.1.1_profiles/AIXM_WX/5.1.1b/AIXM_Features.xsd"/>
    <import namespace="http://www.opengis.net/gml/3.2" schemaLocation="http://schemas.opengis.net/gml/3.2.1/gml.xsd"/>

For the converter language, I am trying to use javascript or typescript. I want to use xml4js library for this project. I want to ask some advices how to define fetching multiple schemas/import or include.

For reference, this is my converter code:

var fs = require('fs');
var util = require('util');
var xml4js = require('xml4js');

// Most of xml2js options should still work
var options = {};
var parser = new xml4js.Parser(options);


// Default is not to download schemas automatically, so we should add it manually
var xsd = fs.readFileSync('./tests/xsd/IWXXM/airmet.xsd', {encoding: 'utf-8'});
var xml = fs.readFileSync('./tests/xml/IWXXM/airmet-A6-1a-TS.xml', {encoding: 'utf-8'});


parser.addSchema('http://icao.int/iwxxm/3.0', xsd, function (err, importsAndIncludes) { 
    // importsAndIncludes contains schemas to be added as well to satisfy all imports and includes found in xsd file
    parser.parseString(xml, function (err, result) {
        console.log(util.inspect(result, false, null));
    });
});

I want to solve that importsandincludes coding part, but i feel lost somehow.

I am not sure this is the right way to ask the question here...:( I am newbie for Stackoverflow. So if you need more resources or information please let me know!