# Deno v0.18.0 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v0.18.0
- **Released:** Sep 13, 2019
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v0.18.0/

## Executive Summary (TL;DR)
Deno v0.18.0. Source highlight: build: remove tools/build.py; cargo build is the build frontend now (#2865, #2874, #2876)

## New Features
- feat: Make integration tests rust unit tests (#2884)
- feat: Set user agent for http client (#2916)
- feat: add bindings to run microtasks from Isolate (#2793)
- feat: Add xeval (denoland/deno_std#581)

## Improvements
- perf: Improve prettier speed by adding d.ts files (denoland/deno_std#591)

## Bug Fixes
- fix(fetch): implement bodyUsed (#2877)
- fix(url): basing in constructor (#2867, #2921)
- fix(xeval): incorrect chunk matching behavior (#2857)
- fix: Default 'this' to window in EventTarget (#2918)
- fix: Expose the DOM Body interface globally (#2903)
- fix: Keep all deno_std URLs in sync (#2930)