fetch / download a URL / binary file (NodeJS)

fetch-file.js

const fs = require("fs");
const fetch = require("node-fetch");

function dl(url, destFilename) {
  return new Promise((resolve, reject) => {
    fetch(url).then((res) => {
      res.body.pipe(fs.createWriteStream(destFilename))
      res.body.on('end', resolve)
      res.body.on('error', reject)
    }).catch(reject)
  });
}