# @wordpress/warning

> Warning utility for WordPress.

Latest version **3.55.0** (published 2026-09-10) · GPL-2.0-or-later license · 0 weekly downloads

## Install

```sh
npm install @wordpress/warning
pnpm add @wordpress/warning
yarn add @wordpress/warning
bun add @wordpress/warning
```

## Health

**Score 70/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; recently updated; high maintenance score; popular repo.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 3.55.0 |
| Published | 2026-09-10 |
| First published | 2020-02-04 |
| Weekly downloads | 0 |
| License | GPL-2.0-or-later |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Node | >=18.12.0 |
| Dependencies | 0 |
| Unpacked size | 54.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 11754 |
| Author | The WordPress Contributors |
| Maintainers | garypendergast, adamsilverstein, gziolo, ntwb, riad, noisysocks, kadamwhite, gutenbergplugin, jorgefilipecosta, ellatrix, iandunn206, whyisjake, ockham, sirreal, nosolosw, wpisabel, ntsekouras, nerrad, desrosj, talldanwp, peterwilsoncc, ryanwelcher, mamaduka, aduth, johnbillion |
| Keywords | wordpress, gutenberg, warning |

## Links

- npm: https://www.npmjs.com/package/@wordpress/warning
- Repository: https://github.com/WordPress/gutenberg
- Homepage: https://github.com/WordPress/gutenberg/tree/HEAD/packages/warning/README.md
- Issues: https://github.com/WordPress/gutenberg/issues
- npm.io page: https://npm.io/package/@wordpress/warning

## Recent versions

- 3.55.0 (latest) — 2026-09-10
- 3.54.1-next.v.202609031004.0 (next) — 2026-09-03
- 3.40.1 (wp-7.0) — 2026-06-30
- 3.33.1 (wp-6.9) — 2025-10-28
- 3.19.1 (wp-6.8) — 2025-03-10
- 3.8.1 (wp-6.7) — 2024-09-19
- 3.0.1 (wp-6.6) — 2024-06-11
- 2.51.1 (wp-6.5) — 2024-02-20
- 2.42.13 (wp-6.4) — 2023-11-13
- 2.35.2 (wp-6.3) — 2023-10-12
- 2.26.2 (wp-6.2) — 2023-10-12
- 2.17.1 (wp-6.1) — 2022-09-20
- 2.6.1 (wp-6.0) — 2022-04-19
- 2.2.2 (wp-5.9) — 2021-10-12
- 2.1.2 (patch) — 2021-09-01
- … 210 more at https://npm.io/package/@wordpress/warning/versions

## README

# Warning

Utility for warning messages to the console based on a passed condition.

## Installation

Install the module

```bash
npm install @wordpress/warning --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for such language features and APIs, you should include [the polyfill shipped in `@wordpress/babel-preset-default`](https://github.com/WordPress/gutenberg/tree/HEAD/packages/babel-preset-default#polyfill) in your code._

## Reducing bundle size

Literal strings aren't minified. Keeping them in your production bundle may increase the bundle size significantly.

To prevent that, you should:

1.  Put `@wordpress/warning/babel-plugin` into your [babel config](https://babeljs.io/docs/plugins#plugin-options) or use [`@wordpress/babel-preset-default`](https://www.npmjs.com/package/@wordpress/babel-preset-default), which already includes the babel plugin.

    This will make sure your `warning` calls are wrapped within a condition that checks if `SCRIPT_DEBUG === true`.

2.  Use [UglifyJS](https://github.com/mishoo/UglifyJS2), [Terser](https://github.com/terser/terser) or any other JavaScript parser that performs [dead code elimination](https://en.wikipedia.org/wiki/Dead_code_elimination). This is usually used in conjunction with JavaScript bundlers, such as [webpack](https://github.com/webpack/webpack).

    When parsing the code in `production` mode, the `warning` call will be removed altogether.

## API

<!-- START TOKEN(Autogenerated API docs) -->

### default

Shows a warning with `message` if environment is not `production`.

_Usage_

```js
import warning from '@wordpress/warning';

function MyComponent( props ) {
  if ( ! props.title ) {
    warning( '`props.title` was not passed' );
  }
  ...
}
```

_Parameters_

-   _message_ `string`: Message to show in the warning.

<!-- END TOKEN(Autogenerated API docs) -->

## Contributing to this package

This is an individual package that's part of the Gutenberg project. The project is organized as a monorepo. It's made up of multiple self-contained software packages, each with a specific purpose. The packages in this monorepo are published to [npm](https://www.npmjs.com/) and used by [WordPress](https://make.wordpress.org/core/) as well as other software projects.

To find out more about contributing to this package or Gutenberg as a whole, please read the project's main [contributor guide](https://github.com/WordPress/gutenberg/tree/HEAD/CONTRIBUTING.md).

<br /><br /><p align="center"><img src="https://s.w.org/style/images/codeispoetry.png?1" alt="Code is Poetry." /></p>

---
_Source: https://npm.io/package/@wordpress/warning · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._