VMF is the format used by the Hammer editor to store maps before their compilation. Since VMF has a syntax similar to JSON, leops decided to write a VMF parser in JavaScript and I decided to write a VMF unparser to turn JSON back into VMF. I have some idea why.

The module exports a single vmfunparser(input) function. The input is a JSON object source object.

const fs = require("fs");

const vmfunparser = require("vmfunparser");

// ...take output from vmfparser
let vmf_as_json = {};

// ...now open in Hammer
fs.writeFileSync("map.vmf", vmfunparser(vmf_as_json));