How can I implement encryption in JavaScript?

How can I implement encryption in JavaScript?

You can use the Web Crypto API for encryption in JavaScript. Would you like a simple example?

Yes, please provide a basic example of encrypting a string.

Here's a simple example using AES encryption:

const text = 'Hello, World!';
const encoder = new TextEncoder();
const data = encoder.encode(text);

const key = await crypto.subtle.generateKey({
  name: 'AES-GCM',
  length: 256
}, true, ['encrypt', 'decrypt']);

const iv = crypto.getRandomValues(new Uint8Array(12));
const encrypted = await crypto.subtle.encrypt({
  name: 'AES-GCM',
  iv: iv
}, key, data);

console.log(new Uint8Array(encrypted));

What about decrypting the string? Can you show me that?

Sure! To decrypt, you would use the same key and IV:

const decrypted = await crypto.subtle.decrypt({
  name: 'AES-GCM',
  iv: iv
}, key, encrypted);
const decryptedText = new TextDecoder().decode(decrypted);
console.log(decryptedText); // 'Hello, World!'