Run JavaScript Everywhere

// server.mjsimport {createServer } from 'node:http';constserver =createServer((req,res) => {res.writeHead(200, { 'Content-Type': 'text/plain' });res.end('Hello World!\n');});// starts a simple http server locally on port 3000server.listen(3000, '127.0.0.1', () => {console.log('Listening on 127.0.0.1:3000');});// run with `node server.mjs`

// tests.mjsimportassert from 'node:assert';importtest from 'node:test';test('that 1 is equal 1', () => {assert.strictEqual(1, 1);});test('that throws as 1 is not equal 2', () => { // throws an exception because 1 != 2assert.strictEqual(1, 2);});// run with `node tests.mjs`

// crypto.mjsimport {createHash } from 'node:crypto';import {readFile } from 'node:fs/promises';consthasher =createHash('sha1');hasher.setEncoding('hex');// ensure you have a `package.json` file for this test!hasher.write(awaitreadFile('package.json'));hasher.end();constfileHash =hasher.read();// run with `node crypto.mjs`

// streams.mjsimport {createReadStream,createWriteStream } from 'node:fs';import {pipeline } from 'node:stream/promises';import {createGzip } from 'node:zlib';// ensure you have a `package.json` file for this test!awaitpipeline(createReadStream('package.json'),createGzip(),createWriteStream('package.json.gz'));// run with `node streams.mjs`

// threads.mjsimport {Worker,isMainThread,workerData,parentPort } from 'node:worker_threads';if (isMainThread) { constdata = 'some data'; constworker = newWorker(import.meta.filename, {workerData:data });worker.on('message',msg =>console.log('Reply from Thread:',msg));} else { constsource =workerData;parentPort.postMessage(btoa(source.toUpperCase()));}// run with `node threads.mjs`