Convert an ArrayBuffer to a Buffer

Create a Node.js Buffer that views all or part of an ArrayBuffer with Buffer.from().

The Node.js Buffer API predates the introduction of ArrayBuffer into the JavaScript language. Bun implements both.

Use the static Buffer.from() method to create a Buffer from an ArrayBuffer.

const arrBuffer = new ArrayBuffer(64);
const nodeBuffer = Buffer.from(arrBuffer);

To create a Buffer that only views a portion of the underlying buffer, pass the offset and length to Buffer.from().

const arrBuffer = new ArrayBuffer(64);
const nodeBuffer = Buffer.from(arrBuffer, 0, 16); // view first 16 bytes