# Is @tanstack/query-core ESM-only? Can you require() it?

> @tanstack/query-core@5.102.8 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

The framework agnostic core that powers TanStack Query

Last verified Sep 9, 2026 against @tanstack/query-core@5.102.8.

@tanstack/query-core publishes both a CommonJS entry and a native ESM entry (ESM added in 4.3.0). require("@tanstack/query-core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@tanstack/query-core" works alongside it.

## What to do

1. Nothing to change. require("@tanstack/query-core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as queryCore from "@tanstack/query-core" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 5.102.8 (Aug 27, 2026)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 5.102.8
- Native ESM since: 4.3.0
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 46.8M
- License: MIT

## Runtime test results for @tanstack/query-core@5.102.8

Installed and executed on Sep 9, 2026 with require("@tanstack/query-core") from a CommonJS file and import "@tanstack/query-core" from an ES module.

| Runtime | require("@tanstack/query-core") | import "@tanstack/query-core" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import @tanstack/query-core

ES modules:

```js
import * as queryCore from "@tanstack/query-core";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
const queryCore = require("@tanstack/query-core");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (359 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 5.90.5 – 5.102.8 | Dual (CommonJS + ESM) | Oct 16, 2025 |

## Frequently asked

**Is @tanstack/query-core ESM-only?**

@tanstack/query-core@5.102.8 ships CommonJS and ESM builds. @tanstack/query-core publishes both a CommonJS entry and a native ESM entry (ESM added in 4.3.0). require("@tanstack/query-core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@tanstack/query-core" works alongside it.

**Can I require @tanstack/query-core?**

Yes. @tanstack/query-core ships a CommonJS entry alongside the native ESM entry. require("@tanstack/query-core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

**Does @tanstack/query-core work in Bun?**

Yes. import "@tanstack/query-core" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does @tanstack/query-core ship TypeScript types?**

Yes. @tanstack/query-core bundles its own type declarations; no @types package is needed.

## Links

- [@tanstack/query-core on npm](https://www.npmjs.com/package/@tanstack/query-core)
- [Source repository](https://github.com/TanStack/query)
- [HTML version](https://canirequire.com/package/@tanstack/query-core/)
- [JSON version](https://canirequire.com/package/@tanstack/query-core.json)

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