To get crypto working in browser, follow instructions bellow 👇

1. Add dependencies

yarn add stream-browserify browserify-zlib events process util buffer

2. Configure vite.config.js

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()],
  resolve: {
    alias: {
      process: "process/browser",
      stream: "stream-browserify",
      zlib: "browserify-zlib",
      util: 'util'
    }
  }
})

3. Add JS to index.html

<!-- [...] -->
<div id="root"></div>

<!-- node // crypto -->
<script>window.global = window;</script>
<script type="module">
    import { Buffer } from "buffer/"; // <-- no typo here ("/")
    import process from "process";
    import EventEmitter from "events";
        
    window.Buffer = Buffer;
    window.process = process;
    window.EventEmitter = EventEmitter;
</script>
<!-- [...] -->

4. Add imports to App.vue, and testing function

in App.vue:

import crypto from 'crypto-browserify'
import { Buffer } from 'buffer/' // <-- no typo here ("/")

// test crypto 
function crypt() {
  // Node.js program to demonstrate the    
  // crypto.createCipheriv() method
  
  const iv = crypto.randomBytes(16);
  const key = crypto.pbkdf2Sync("foobar", "salt", 1000, 32, 'sha512');
  const cipher = crypto.createCipheriv('aes-256-gcm', key, iv);
  var text = crypto.randomBytes(200)
  var ourCipherText = Buffer.concat([cipher.update(text), cipher.final()])
  console.log("ciphered text:", ourCipherText.toString('hex'))

  return ourCipherText.toString('hex');
}

[...]

Result ✅

The function crypto.createCipheriv is a node.js only function meaning it is not available in the browser like in a Vue app. You should look into SubtleCrypto which provides native web features for many encryption purposes like AES. As always, it should be noted that one should be very careful and methodical when using low-level crypto primitives, especially regarding encryption. This page provides more examples of AES encryption specifically.