# Deno v1.12.0 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.12.0
- **Released:** Jul 13, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.12.0/

## Executive Summary (TL;DR)
Deno v1.12.0. Source highlight: feat: Add `MessageChannel` and `MessagePort` APIs (#11051)

## New Features
- feat: Add `MessageChannel` and `MessagePort` APIs (#11051)
- feat: Deno namespace configurable and unfrozen (#11062)
- feat: Enable WebAssembly.instantiateStreaming and WebAssembly.compileStreaming (#11200)
- feat: Support "types" option when type checking (#10999)
- feat: Support SharedArrayBuffer sharing between workers (#11040)
- feat: Transfer MessagePort between workers (#11076)

## Bug Fixes
- fix: Align DedicatedWorkerGlobalScope event handlers to spec (#11353)
- fix: Move stable/unstable types/APIs to their correct places (#10880)
- fix(core): Fix concurrent loading of dynamic imports (#11089)
- fix(extensions/console): Eliminate panic inspecting event classes (#10979)
- fix(extensions/console): Inspecting prototypes of built-ins with custom inspect implementations should not throw (#11308)
- fix(extensions/console): Left align table entries (#11295)