@nodecfdi/cfdi-cleaner/dist/esm/xml_string_cleaners/split_xml_declaration_from_document.js

Librería para limpiar comprobantes fiscales digitales v3.3 y v4.0

export default class SplitXmlDeclarationFromDocument {
    clean(xml) {
        return xml.replaceAll(/(<\?xml.*?\?>)\s*</g, '$1\n<');
    }
}