ArrayBuffer.prototype.transfer not-really-a-polyfill

transfer.js

// This creates a copy, but does detach the source buffer

const mc = new MessageChannel();

ArrayBuffer.prototype.transfer = function () {
  const result = this.slice();
  mc.port1.postMessage(this, [this]);
  return result;
};

const ab = new ArrayBuffer(10);
console.log(ab.byteLength);

const transferred = ab.transfer();
console.log(ab.byteLength);
console.log(transferred.byteLength);