String.toByteArray.js

// Implementation of Kotlin `String.toByteArray` in JavaScript
// https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-byte-array.html

const UTF8ByteArrayFromString = (string) => {
  const encoder = new TextEncoder()
  return encoder.encode(string)
}

const stringFromUTF8ByteArray = (array) => {
  const decoder = new TextDecoder()
  return decoder.decode(array)
}

const message = 'Hello'
const coded = UTF8ByteArrayFromString(message)
const decoded = stringFromUTF8ByteArray(coded)
console.log(coded)
console.log(decoded)