This is a playground to test JavaScript. It runs a completely standard copy of Node.js on a virtual server created just for you. Every one of npm’s 300,000+ packages are pre-installed, so try it out:
const needle = require('needle');
const url = 'https://www.elwis.de/DE/dynamisch/gewaesserkunde/wasserstaende/wasserstaendeUebersichtGrafik.html.php?gw=RHEIN';
needle.head(url, (error) => {
console.log('This just crashed with no error', error);
});