--- title: JavaScript Async Lifetimes: Fix Your Leaking Code (2026) description: A deep dive into async resource leaks in JavaScript caused by Promise.all not cancelling orphaned tasks when one fails. Covers three real production failure... canonical: https://daily.dev/posts/javascript-async-lifetimes-fix-your-leaking-code-2026--n2ucnhmvn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: JavaScript Async Lifetimes: Fix Your Leaking Code (2026) | daily.dev og:description: A deep dive into async resource leaks in JavaScript caused by Promise.all not cancelling orphaned tasks when one fails. Covers three real production failure... og:url: https://daily.dev/posts/javascript-async-lifetimes-fix-your-leaking-code-2026--n2ucnhmvn og:image: https://api.daily.dev/og/posts/n2UCNhMvn.png og:image:alt: JavaScript Async Lifetimes: Fix Your Leaking Code (2026) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # JavaScript Async Lifetimes: Fix Your Leaking Code (2026) **[Alex CloudStar](https://daily.dev/sources/alexcloudstar)** · [@alexcloudstar](https://daily.dev/alexcloudstar) · 12 min read · 2 upvotes · 0 comments ## Summary A deep dive into async resource leaks in JavaScript caused by Promise.all not cancelling orphaned tasks when one fails. Covers three real production failure patterns (abandoned fetches, zombie DB queries, bound ports), then explains how ES2026 primitives fix them: `await using` with Symbol.asyncDispose for guaranteed cleanup, and AbortSignal.any() for composed cancellation. Shows how to build a TaskScope abstraction combining both, integrates AsyncLocalStorage for ambient request context in Node.js 24, and briefly covers the Effection library as an alternative. Honestly acknowledges that JavaScript still lacks enforced structured concurrency unlike Go, Kotlin, or Swift. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [20 Mistakes That Quietly Destroy JavaScript/TypeScript Codebases \(Part 2\)](https://daily.dev/posts/20-mistakes-that-quietly-destroy-javascript-typescript-codebases-part-2--lgbflmz2i) · The T-Shaped Dev · 59 upvotes · 1 comments - [6 Async JavaScript Mistakes That Become React Bugs](https://daily.dev/posts/6-async-javascript-mistakes-that-become-react-bugs-kpe0sld3r) · Medium · 1 upvotes · 0 comments - [What Async Promised and What it Delivered — Causality](https://daily.dev/posts/what-async-promised-and-what-it-delivered-causality-ocp1tkuw6) · Hacker News · 17 upvotes · 6 comments - [ES2026 JavaScript Features: Complete Developer Guide](https://daily.dev/posts/es2026-javascript-features-complete-developer-guide-mp5blizq1) · Alex CloudStar · 103 upvotes · 11 comments - [The Async Mistake That Makes JavaScript Code Lie to You](https://daily.dev/posts/the-async-mistake-that-makes-javascript-code-lie-to-you-b9d5ujlbf) · Medium · 4 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#nodejs](https://daily.dev/tags/nodejs) [View this post on daily.dev](https://daily.dev/posts/javascript-async-lifetimes-fix-your-leaking-code-2026--n2ucnhmvn) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"JavaScript Async Lifetimes: Fix Your Leaking Code (2026)","url":"https://daily.dev/posts/javascript-async-lifetimes-fix-your-leaking-code-2026--n2ucnhmvn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/javascript-async-lifetimes-fix-your-leaking-code-2026--n2ucnhmvn"},"datePublished":"2026-05-07T08:25:35.938Z","dateModified":"2026-05-08T05:00:18.243Z","description":"A deep dive into async resource leaks in JavaScript caused by Promise.all not cancelling orphaned tasks when one fails. 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