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1.0.1 • Public • Published


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This package is based on p-defer. It did not contains an ES5 module. Importing the module directly or indirectly may break web apps running on ES5 browsers.

On install, this package will transpile your version of p-defer to make it compatible with ES5 browsers.

Package authors should consider importing this package instead of p-defer, so your packages will not break your users due to having p-defer as a transient dependency.

How to use

To install in your project, run:

npm install p-defer p-defer-es5

You can also use it in HTML:

<script src="https://unpkg.com/p-defer/dist/p-defer-es5.production.min.js"></script>

How it works

On postinstall, this package will run Babel and Webpack to transpile p-defer into a single file.

This package peer-depends on p-defer. Thus, you can select your own version of p-defer.

Updating p-defer

When you update p-defer, re-run npm install p-defer-es5 to get the latest package transpiled.


Instead of importing this package, there are alternative workarounds you can use.

Including the source code

You can copy the source code of p-defer into your web app and use your build pipeline transpile the original package.

Be sure to include the original license and continue to depends on the package to make sure npm audit will scan for vulnerabilities.

Modify your bundler configuration

Webpack do not transpile code under /node_modules/ unless specified explicitly. You can modify webpack.config.js to include /node_modules/p-defer/ and use babel-loader to transpile it on-the-fly.


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npm i p-defer-es5

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