node-downloader.js

const fs = require('fs');
const path = require('path');
const fetch = require('node-fetch');

if (!fs.existsSync('images')) {
    fs.mkdirSync('images');
}

async function download(url) {
    const request = await fetch(url);
    const filePath = './images/' + path.basename(url)
    const stream = fs.createWriteStream(filePath);
    return new Promise((resolve, reject) => {
        request.body.pipe(stream);
        request.body.on('error', error => {
            reject(error);
        });
        stream.on('finish', () => {
            resolve();
        });
    });
}