This release contains multiple breaking changes. These should not affect the majority of users but it is recommended to consider the full change list.

Improvements

• Improved global API ergonomics (#740)
• Removed --insecure-http-parser support (3d1027f)
• Pass headers as Buffer (#696)
• Simplify api (#695)
• Accept callbacks in Agent close and destroy (d1a406f)
• Added closed and destroyed properties on Agent (#634)
• Allow overriding timeouts per requests (#679)
• Update deps (#675, 8158def)
• Add undici mocking support (#587)
• Unify Client, Pool & Agent under Dispatcher (#544, #606, #620)
• Add connectTimeout (#619)
• Follow redirects (#603) (#769)
• Client lifecycle diagram (#567)
• Docs improvements and site (undici.nodejs.org) (#550, #565, #567, #582, #585, #596, 5095a2b, #627)
• Reuse tls sessions across clients of a connection pool (#588)
• Add strictContentLength option to treat request content length mismatch as warning (#586)
• Connecting through a proxy (#568)
• Agent connect/disconnect events (#558)
• Use llhttp WASM build for http parsing (#564, #611, #642, #648, #680)
• Only append non empty search to path (e8ece2a)
• Add factory arg to Pool and Agent (761738a)
• Use husky (#605)
• Add pr and issue templates (#608)
• Allow process to exit when no requests are pending (#772)
• Add data to parser errors (7a750ba)
• Try to re-use timer when possible (#729)
• Make request errors explicit (#777)

Fixes

• Don't emit 'disconnect' without preceding 'connect'(#771)
• Don't fail when response ends before request body (#709)
• Don't headersTimeout while writing request body (#646)
• Emit 'disconnect' after destroy() (#665)
• Refresh timeout timer on parser resume (#653)
• Agent deep copy options (#636)
• Kill socket on request abort (#689)
• Add more strict check for streams in util.isStream() (#628)
• Remove Node 10 support (#623)
• Remove the esm wrapper, rely on commonjs auto detection (#599)
• Always detach socket on upgrade (252b676)
• Invoke onUpgrade after detach (641e018)
• Missing client arg (#555)
• Reduce queueMicrotask scope (#572)
• Wait for queued handlers to run before onError (#548)
• Add BodyTimeoutError to error types (#546)
• Omit path in undici.request opts (ts) (#559)
• Don't queue if destroyed (3d002c1)
• Agent.dispatch catch error (8c0051f)