JavaScript in CoCalc

1 + 1;

process.version;

[1, 2, 5, 10];

function test(x, y) {
  s = [];
  for (var i = 0; i < x; i++) {
    s.push(y + i);
  }
  return s;
}

test(10, 23);

$$.async();

console.log("Hello, World!");

function run() {
  console.log("I'm done waiting a second.");
  $$.done();
}

setTimeout(run, 1000);

const fs = require("fs");

$$.async();

fs.readFile("javascript.ipynb", "utf8", (err, data) => {
  const nb = JSON.parse(data);
  console.log(JSON.stringify(nb.cells[1], null, 2));
  $$.done();
});

async function a() {
  console.log("start");
  await new Promise((done, fail) => setTimeout(done, 1000));
  console.log("done");
}

$$.async();

(async () => {
  await a();
  $$.done();
})();

var http = require("http");

http
  .createServer(function (req, res) {
    res.writeHead(200, { "Content-Type": "text/plain" });
    res.end(`Hello World!\nIt's ${new Date().toISOString()}`);
  })
  .listen(8080);