@mvrx/wbxml

Zero-dependency WBXML parser and encoder for Exchange ActiveSync 14.1.

Works on Cloudflare Workers, Node.js 18+, Deno, Bun, and browsers — no native modules, no Node.js APIs.

Install

npm install @mvrx/wbxml

Usage

import { decode, encode } from "@mvrx/wbxml";

// Parse a WBXML binary buffer from an EAS response
const tree = decode(wbxmlBuffer);
console.log(tree.tag);           // "Sync"
console.log(tree.children);     // [{ tag: "Collections", ... }]

// Build and encode an EAS request
const buffer = encode({
  tag: "Sync",
  namespace: "AirSync",
  children: [
    {
      tag: "Collections",
      children: [
        {
          tag: "Collection",
          children: [
            { tag: "SyncKey", text: "0" },
            { tag: "CollectionId", text: "inbox" },
          ],
        },
      ],
    },
  ],
});

Runtime compatibility

| Runtime | Supported | |---|---| | Cloudflare Workers | ✓ | | Node.js 18+ | ✓ | | Deno | ✓ | | Bun | ✓ | | Browser | ✓ |

License

MIT — licensed separately from @mvrx/mail (AGPL-3.0-only). As a standalone protocol parser with no product logic, @mvrx/wbxml is permissively licensed so it can be freely embedded in any project, proprietary or otherwise. See LICENSE.