xmlNodeToObject.js

        const SingleValue = Symbol("XML_TRANSPORT_VALUE")
        function xmlNodeToObject(node) {
            let res = {
                ...Array.from(node.children).map(xmlNodeToObject).reduce((a, v) => {
                    const val = v[SingleValue] ? v.$_value : v;
                    if (Array.isArray(a[v.$_.nodeName])) {
                        a[v.$_.nodeName].push(val);
                    } else if (a[v.$_.nodeName]) {
                        a[v.$_.nodeName] = [a[v.$_.nodeName], val];
                    } else {
                        a[v.$_.nodeName] = val;
                    }
                    return a;
                }, {}),
                $_attributes: new Map(Array.from(node.attributes).map(_ => ([_.name, _.value]))),
                $_value: node.children.length === 0 ? node.childNodes[0] ? node.childNodes[0].nodeValue : (Array.from(node.attributes).reduce((a, v) => {
                    a[v.name] = v.value;
                    return a
                }, {})) : null,
                $_: node,
                [SingleValue]: node.children.length === 0
            }
            return res;
        }