# Is @istanbuljs/nyc-config-typescript ESM-only? Can you require() it?

> @istanbuljs/nyc-config-typescript@1.0.2 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

nyc configuration that works with typescript

Last verified Sep 9, 2026 against @istanbuljs/nyc-config-typescript@1.0.2.

@istanbuljs/nyc-config-typescript ships CommonJS only. require("@istanbuljs/nyc-config-typescript") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8. import "@istanbuljs/nyc-config-typescript" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

## What to do

1. require("@istanbuljs/nyc-config-typescript") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.
2. From ES modules use the default import: import nycConfigTypescript from "@istanbuljs/nyc-config-typescript"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: no types are available for @istanbuljs/nyc-config-typescript; declare the module yourself if you need them.

## Facts

- Latest: 1.0.2 (Dec 1, 2021)
- Module format: CommonJS
- Last CommonJS version: 1.0.2
- TypeScript types: none
- Node engines: >=8
- Weekly downloads: 399K
- License: ISC

## Runtime test results for @istanbuljs/nyc-config-typescript@1.0.2

Installed and executed on Sep 9, 2026 with require("@istanbuljs/nyc-config-typescript") from a CommonJS file and import "@istanbuljs/nyc-config-typescript" from an ES module.

| Runtime | require("@istanbuljs/nyc-config-typescript") | import "@istanbuljs/nyc-config-typescript" |
|---|---|---|
| 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 @istanbuljs/nyc-config-typescript

ES modules:

```js
import nycConfigTypescript from "@istanbuljs/nyc-config-typescript";
```

CommonJS:

```js
const nycConfigTypescript = require("@istanbuljs/nyc-config-typescript");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (7 versions; the newest 7 shown).

| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 1.0.2 | CommonJS | Jan 29, 2019 |

## Frequently asked

**Is @istanbuljs/nyc-config-typescript ESM-only?**

@istanbuljs/nyc-config-typescript@1.0.2 is a CommonJS package. @istanbuljs/nyc-config-typescript ships CommonJS only. require("@istanbuljs/nyc-config-typescript") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8. import "@istanbuljs/nyc-config-typescript" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

**Can I import @istanbuljs/nyc-config-typescript with ES module syntax?**

Yes. import nycConfigTypescript from "@istanbuljs/nyc-config-typescript" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

**Does @istanbuljs/nyc-config-typescript work in Bun?**

Yes. import "@istanbuljs/nyc-config-typescript" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does @istanbuljs/nyc-config-typescript ship TypeScript types?**

No. @istanbuljs/nyc-config-typescript ships no type declarations and there is no @types package for it.

## Links

- [@istanbuljs/nyc-config-typescript on npm](https://www.npmjs.com/package/@istanbuljs/nyc-config-typescript)
- [Source repository](https://github.com/istanbuljs/istanbuljs)
- [HTML version](https://canirequire.com/package/@istanbuljs/nyc-config-typescript/)
- [JSON version](https://canirequire.com/package/@istanbuljs/nyc-config-typescript.json)

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