@tanstack/query-core
The framework agnostic core that powers TanStack Query
About
The framework agnostic core that powers TanStack Query
Live mirror of the GitHub README. Updated whenever the repo's default branch changes.
TanStack Query
An async state management library built to simplify fetching, caching, synchronizing, and updating server state.
- Protocol‑agnostic fetching (REST, GraphQL, promises, etc.)
- Caching, refetching, pagination & infinite scroll
- Mutations, dependent queries & background updates
- Prefetching, cancellation & React Suspense support
Read the docs →
Get Involved
- We welcome issues and pull requests!
- Participate in GitHub discussions
- Chat with the community on Discord
- See CONTRIBUTING.md for setup instructions
Partners
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We're looking for TanStack Query Partners to join our mission! Partner with us to push the boundaries of TanStack Query and build amazing things together.
LET'S CHATExplore the TanStack Ecosystem
- TanStack Config – Tooling for JS/TS packages
- TanStack DB – Reactive sync client store
- TanStack DevTools – Unified devtools panel
- TanStack Form – Type‑safe form state
- TanStack Pacer – Debouncing, throttling, batching
- TanStack Query – Async state & caching
- TanStack Ranger – Range & slider primitives
- TanStack Router – Type‑safe routing, caching & URL state
- TanStack Start – Full‑stack SSR & streaming
- TanStack Store – Reactive data store
- TanStack Table – Headless datagrids
- TanStack Virtual – Virtualized rendering
… and more at TanStack.com »
Quick facts
npm install @tanstack/query-coreHow Sourcemap Explorer detects @tanstack/query-core
We catch @tanstack/query-core from two complementary signals: bundled source paths and the embedded package.json. Modern bundlers (webpack, Vite, esbuild, Rollup, Turbopack) preserve the original node_modules/@tanstack/query-core/ paths inside the JavaScript sourcemap's sources[] array — that's the canonical signal. When the matching package.json is also captured in sourcesContent[], we read the exact version field — patch number included. No regex guessing, no version inference.
- 1
Confirm the site exposes sourcemaps
In DevTools Network, check the response headers of any application script for `SourceMap` or `X-SourceMap`. Failing that, fetch the script's last 4 KB and look for a `//# sourceMappingURL=` comment.
- 2
Find the package in the bundle
Open DevTools → Network → reload. Click any application script and look at its sourcemap. Inside, search `sources[]` for entries matching `node_modules/@tanstack/query-core/` — every match confirms the package is bundled. The matching `sourcesContent[i]` for `node_modules/@tanstack/query-core/package.json` gives you the exact installed version.
- 3
Read the version directly from package.json
Run `jq -r '. as $m | $m.sources | to_entries[] | select(.value | endswith("node_modules/@tanstack/query-core/package.json")) | $m.sourcesContent[.key] | fromjson | .version' bundle.js.map`. Sourcemap Explorer automates the same query in the popup.
Recent versions
FAQ
What is @tanstack/query-core used for?
The framework agnostic core that powers TanStack Query
How can I tell if a website is using @tanstack/query-core?
Open the page in Chrome with the Sourcemap Explorer extension installed and read the Stack tab. We catch `@tanstack/query-core` from two complementary signals: `node_modules/@tanstack/query-core/` paths inside the JavaScript sourcemap, and the embedded `package.json` we read for exact-version detection. Without the extension you can do the same lookup manually in DevTools — the steps are listed in the "How Sourcemap Explorer detects" section above.
What is the latest version of @tanstack/query-core?
5.100.9, as published on the npm registry. The "Recent versions" table on this page lists the most recent 8 releases with their release dates. Sourcemap Explorer reports the version actually bundled into a site, which can lag the latest release by months on real-world deployments.
Where can I read more?
Project homepage: https://tanstack.com/query. Source code: https://github.com/TanStack/query. Published on npm: https://www.npmjs.com/package/@tanstack/query-core. Licensed as MIT.
Detected by Sourcemap Explorer
When a bundle ships sourcemaps, we read the embedded package.json for @tanstack/query-core and report the precise version. Without sourcemaps, an import / require in the page's scripts is enough to flag it.