# @google-cloud/promisify > A simple utility for promisifying functions and classes. Latest version **6.0.1** (published 2026-08-11) · Apache-2.0 license · 0 weekly downloads ## Install ```sh npm install @google-cloud/promisify pnpm add @google-cloud/promisify yarn add @google-cloud/promisify bun add @google-cloud/promisify ``` ## Health **Score 55/100 (C)** — status: active. Positive: no vulnerabilities; recently updated; high maintenance score. Warnings: low downloads; no types; no esm support. ## Facts | | | |---|---| | Version | 6.0.1 | | Published | 2026-08-11 | | First published | 2018-07-08 | | Weekly downloads | 0 | | License | Apache-2.0 | | TypeScript types | none | | Module format | CommonJS | | Dependencies | 0 | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 3196 | | Author | Google Inc. | | Maintainers | google-wombot | ## Links - npm: https://www.npmjs.com/package/@google-cloud/promisify - Repository: https://github.com/googleapis/google-cloud-node - Homepage: https://github.com/googleapis/google-cloud-node/tree/main/core/promisify - Issues: https://github.com/googleapis/google-cloud-node/issues - npm.io page: https://npm.io/package/@google-cloud/promisify ## Recent versions - 6.0.1 (latest) — 2026-08-11 - 5.1.0 (legacy-18) — 2026-07-07 - 4.0.0 (legacy-14) — 2023-08-08 - 2.0.4 (legacy-10) — 2021-09-09 - 1.0.4 (legacy-8) — 2019-12-05 - 6.0.0 — 2026-07-30 - 5.0.1 — 2026-06-04 - 5.0.0 — 2025-03-11 - 4.1.0 — 2025-03-05 - 3.0.1 — 2022-09-08 - 3.0.0 — 2022-05-06 - 2.0.3 — 2020-09-04 - 2.0.2 — 2020-07-15 - 2.0.1 — 2020-06-02 - 2.0.0 — 2020-03-23 - … 9 more at https://npm.io/package/@google-cloud/promisify/versions ## README [//]: # "This README.md file is auto-generated, all changes to this file will be lost." [//]: # "To regenerate it, use `python -m synthtool`." Google Cloud Platform logo # [Google Cloud Common Promisify: Node.js Client](https://github.com/googleapis/nodejs-promisify) [![release level](https://img.shields.io/badge/release%20level-stable-brightgreen.svg?style=flat)](https://cloud.google.com/terms/launch-stages) [![npm version](https://img.shields.io/npm/v/@google-cloud/promisify.svg)](https://www.npmjs.org/package/@google-cloud/promisify) A simple utility for promisifying functions and classes. A comprehensive list of changes in each version may be found in [the CHANGELOG](https://github.com/googleapis/nodejs-promisify/blob/main/CHANGELOG.md). * [Google Cloud Common Promisify Node.js Client API Reference][client-docs] * [github.com/googleapis/nodejs-promisify](https://github.com/googleapis/nodejs-promisify) Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in [Client Libraries Explained][explained]. [explained]: https://cloud.google.com/apis/docs/client-libraries-explained **Table of contents:** * [Quickstart](#quickstart) * [Installing the client library](#installing-the-client-library) * [Using the client library](#using-the-client-library) * [Samples](#samples) * [Versioning](#versioning) * [Contributing](#contributing) * [License](#license) ## Quickstart ### Installing the client library ```bash npm install @google-cloud/promisify ``` ### Using the client library ```javascript const {promisify} = require('@google-cloud/promisify'); /** * This is a very basic example function that accepts a callback. */ function someCallbackFunction(name, callback) { if (!name) { callback(new Error('Name is required!')); } else { callback(null, `Well hello there, ${name}!`); } } // let's promisify it! const somePromiseFunction = promisify(someCallbackFunction); async function quickstart() { // now we can just `await` the function to use it like a promisified method const [result] = await somePromiseFunction('nodestronaut'); console.log(result); } quickstart(); ``` It's unlikely you will need to install this package directly, as it will be installed as a dependency when you install other `@google-cloud` packages. ## Samples Samples are in the [`samples/`](https://github.com/googleapis/nodejs-promisify/tree/main/samples) directory. Each sample's `README.md` has instructions for running its sample. | Sample | Source Code | Try it | | --------------------------- | --------------------------------- | ------ | | Quickstart | [source code](https://github.com/googleapis/nodejs-promisify/blob/main/samples/quickstart.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-promisify&page=editor&open_in_editor=samples/quickstart.js,samples/README.md) | The [Google Cloud Common Promisify Node.js Client API Reference][client-docs] documentation also contains samples. ## Supported Node.js Versions Our client libraries follow the [Node.js release schedule](https://github.com/nodejs/release#release-schedule). Libraries are compatible with all current _active_ and _maintenance_ versions of Node.js. If you are using an end-of-life version of Node.js, we recommend that you update as soon as possible to an actively supported LTS version. Google's client libraries support legacy versions of Node.js runtimes on a best-efforts basis with the following warnings: * Legacy versions are not tested in continuous integration. * Some security patches and features cannot be backported. * Dependencies cannot be kept up-to-date. Client libraries targeting some end-of-life versions of Node.js are available, and can be installed through npm [dist-tags](https://docs.npmjs.com/cli/dist-tag). The dist-tags follow the naming convention `legacy-(version)`. For example, `npm install @google-cloud/promisify@legacy-8` installs client libraries for versions compatible with Node.js 8. ## Versioning This library follows [Semantic Versioning](http://semver.org/). This library is considered to be **stable**. The code surface will not change in backwards-incompatible ways unless absolutely necessary (e.g. because of critical security issues) or with an extensive deprecation period. Issues and requests against **stable** libraries are addressed with the highest priority. More Information: [Google Cloud Platform Launch Stages][launch_stages] [launch_stages]: https://cloud.google.com/terms/launch-stages ## Contributing Contributions welcome! See the [Contributing Guide](https://github.com/googleapis/nodejs-promisify/blob/main/CONTRIBUTING.md). Please note that this `README.md`, the `samples/README.md`, and a variety of configuration files in this repository (including `.nycrc` and `tsconfig.json`) are generated from a central template. To edit one of these files, make an edit to its templates in [directory](https://github.com/googleapis/synthtool). ## License Apache Version 2.0 See [LICENSE](https://github.com/googleapis/nodejs-promisify/blob/main/LICENSE) [client-docs]: https://googleapis.dev/nodejs/promisify/latest [shell_img]: https://gstatic.com/cloudssh/images/open-btn.png [projects]: https://console.cloud.google.com/project [billing]: https://support.google.com/cloud/answer/6293499#enable-billing [auth]: https://cloud.google.com/docs/authentication/external/set-up-adc-local --- _Source: https://npm.io/package/@google-cloud/promisify · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._