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title Exécuter du JavaScript partout
layout home

Exécuter du JavaScript partout

Node.js® est un environnement d'exécution JavaScript gratuit, open-source et multiplateforme qui permet aux développeurs de créer des serveurs, des applications web, des outils en ligne de commande et des scripts.
Installer Node.js 
  <Button kind="primary" className="!block dark:!hidden" href="/download">Installer Node.js</Button>

  <Button kind="secondary" className="!block" href="https://www.herodevs.com/support/node-nes?utm_source=NodeJS+&utm_medium=Link&utm_campaign=Homepage_button">
    <span>Obtenir une aide à la sécurité</span>

    <br />

    <small className="!text-xs">pour Node.js 18 et moins</small>
  </Button>
</div>
```js displayName="Create an HTTP Server" // server.mjs import { createServer } from 'node:http'; 
const server = createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World!\n');
});

// starts a simple http server locally on port 3000
server.listen(3000, '127.0.0.1', () => {
  console.log('Listening on 127.0.0.1:3000');
});

// run with `node server.mjs`
```

```js displayName="Write Tests"
// tests.mjs
import assert from 'node:assert';
import test 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 != 2
  assert.strictEqual(1, 2);
});

// run with `node tests.mjs`
```

```js displayName="Read and Hash a File"
// crypto.mjs
import { createHash } from 'node:crypto';
import { readFile } from 'node:fs/promises';

const hasher = createHash('sha1');

hasher.setEncoding('hex');
// ensure you have a `package.json` file for this test!
hasher.write(await readFile('package.json'));
hasher.end();

const fileHash = hasher.read();

// run with `node crypto.mjs`
```

```js displayName="Streams Pipeline"
// streams.mjs
import { 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!
await pipeline(
  createReadStream('package.json'),
  createGzip(),
  createWriteStream('package.json.gz')
);

// run with `node streams.mjs`
```

```js displayName="Work with Threads"
// threads.mjs
import { Worker, isMainThread,
  workerData, parentPort } from 'node:worker_threads';

if (isMainThread) {
  const data = 'some data';
  const worker = new Worker(import.meta.filename, { workerData: data });
  worker.on('message', msg => console.log('Reply from Thread:', msg));
} else {
  const source = workerData;
  parentPort.postMessage(btoa(source.toUpperCase()));
}

// run with `node threads.mjs`
```

Apprenez-en plus sur ce que Node.js est capable d'offrir avec notre Matériel d'apprentissage.