# Is @ethersproject/solidity ESM-only? Can you require() it?

> @ethersproject/solidity@5.8.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Solidity coder for non-standard (tight) packing.

Last verified Sep 9, 2026 against @ethersproject/solidity@5.8.0.

@ethersproject/solidity ships CommonJS only. require("@ethersproject/solidity") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@ethersproject/solidity" 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.

It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.

## What to do

1. require("@ethersproject/solidity") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
2. From ES modules use the default import: import solidity from "@ethersproject/solidity"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 5.8.0 (Feb 26, 2025)
- Module format: CommonJS
- Last CommonJS version: 5.8.0
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 901K
- License: MIT

## Runtime test results for @ethersproject/solidity@5.8.0

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

| Runtime | require("@ethersproject/solidity") | import "@ethersproject/solidity" |
|---|---|---|
| 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 @ethersproject/solidity

ES modules:

```js
import solidity from "@ethersproject/solidity";
```

CommonJS:

```js
const solidity = require("@ethersproject/solidity");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (20 versions; the newest 20 shown).

| Versions | Format | First published |
|---|---|---|
| 5.0.0 – 5.8.0 | CommonJS | Jun 13, 2020 |

## Frequently asked

**Is @ethersproject/solidity ESM-only?**

@ethersproject/solidity@5.8.0 is a CommonJS package. @ethersproject/solidity ships CommonJS only. require("@ethersproject/solidity") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@ethersproject/solidity" 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 @ethersproject/solidity with ES module syntax?**

Yes. import solidity from "@ethersproject/solidity" 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 @ethersproject/solidity work in Bun?**

Yes. import "@ethersproject/solidity" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does @ethersproject/solidity ship TypeScript types?**

Yes. @ethersproject/solidity bundles its own type declarations; no @types package is needed.

## Links

- [@ethersproject/solidity on npm](https://www.npmjs.com/package/@ethersproject/solidity)
- [Source repository](https://github.com/ethers-io/ethers.js)
- [HTML version](https://canirequire.com/package/@ethersproject/solidity/)
- [JSON version](https://canirequire.com/package/@ethersproject/solidity.json)

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