Parsing .rbxlx files can be difficult to do using NodeJS since there are no libraries currently available for that, until now.

Simply put, it parses .rbxlx files (not .rbxl) in an organised manner. This can be useful in many ways and I personally use it to convert the files to objects where I then can for example find all the scripts with a specific name.

There are of course many others ways you can use this and one is for example importing a place file, changing the Color3 of all frames to something that you retrieved from an api and then importing it back to Roblox.

It simply means that we break down the file into a more user friendly structure that is easier to work with than traditional xml files.

This is a basic example on how to use it, in this case we parse a .rbxlx file and then output every Part in that file.

const rbxlx = require("../index.js");
const util = require("util");
const path = require("path");
const fs = require("fs");

rbxlx.parse(fs.readFileSync(path.join(__dirname, "test.rbxlx")))
.then(tree => {
    console.log("Parsed file!");

    var descendants = tree.getDescendants();
    for (var object of descendants) {
        if (object.class == "Part") {
            console.log("We found a Part named", object.getProperty("Name"));
        }
    }

    // You can also output the entire tree structure
    //console.log(util.inspect(tree, {depth: Infinity, colors: true}));
})
.catch(err => {
    console.log(`Could not parse file because: ${err.message}`);
})

You can use this module, if you want a demo on how to use it then check out this place.

The parser isn't perfect so if you have any general feedback on it or the module then feel free to contact me!