node:buffer — Elide Docs

globalThis.Buffer and the Buffer export from node:buffer have the same identity. Buffers are Uint8Array instances with indexed access and a stable underlying ArrayBuffer.

import { Buffer } from "node:buffer";

const bytes = Buffer.from("hello", "utf8");
console.log(bytes[0]); // 104
console.log(bytes.toString("hex")); // 68656c6c6f
console.log(bytes instanceof Uint8Array); // true

Use Buffer.alloc, Buffer.allocUnsafe, Buffer.allocUnsafeSlow, and Buffer.from to create buffers. Calling Buffer() or new Buffer() still works for compatibility but emits a deprecation warning.

Common Node operations are available, including compare, copy, equals, fill, includes, indexOf, slice, subarray, write, fixed- and variable-width numeric reads/writes, BigInt reads/writes, and byte swaps.

Supported encodings include utf8, utf16le, latin1, ascii, base64, base64url, and hex. utf16be is not accepted.

node:buffer also exports Blob, File, SlowBuffer, atob, btoa, isAscii, isUtf8, transcode, size constants, and related helpers.

Unlike Node, Elide 1.5.0’s allocUnsafe implementations return zero-filled memory rather than exposing previously used bytes.