---
title: JavaScript SDK 0.2.2
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2022/02/javascript-sdk-0.2.2
---

## Added

- Add full support for TransformStreams
- Support directly piping Request/Response bodies to other Requests/Responses instead of manually copying every chunk
- Add support for the `queueMicrotask` global function
- Add support for the `structuredClone` global function
- Add support for the `location` global object as an instance of `WorkerLocation`
- Support BigUint64Array and BigInt64Array in crypto.getRandomValues
- Enable class static blocks syntax
- Returned the exit code from the JS Compute Runtime, by passing it up through our CLI

## Changed

- Increase max supported header size from 4096 bytes to 69000 bytes
- Update to SpiderMonkey 96 beta

## Fixed

- Avoid waiting for async tasks that weren't passed to `FetchEvent#waitUntil`
- Significantly improve spec-compliance of Request and Response builtins