jsparser

#!/usr/bin/env node

const acorn = require("acorn");
const dashAst = require('dash-ast')
const XmlWriter = require('xml-writer');
const fs = require('fs')
const code = fs.readFileSync(process.argv[2], 'utf8')
const ast = acorn.parse(code, {ecmaVersion: 2020, sourceType: 'module'});
const xml = new XmlWriter(true);
xml.startDocument();

dashAst(ast, {
    enter: function(node, parent) {
        xml.startElement('tree');
        xml.writeAttribute('type', node.type);
        xml.writeAttribute('pos', node.start);
        xml.writeAttribute('length', node.end - node.start);
        
        if (node.type == 'Identifier')
            xml.writeAttribute('label', node.name);
        else if (node.type == 'Literal')
            xml.writeAttribute('label', node.raw);
      },
      leave: function(node, parent) {
        xml.endElement();
      }
});

xml.endDocument();
console.log(xml.toString());