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This package is based on abort-controller. Although the original package contains an ES5 bundle, 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 abort-controller to make it compatible with ES5 browsers.

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

How to use

To install in your project, run:

npm install abort-controller abort-controller-es5

In your code:

const controller = new AbortController();
controller.signal.addEventListener('abort', event => {
  // Handle abort signal

You can also use it in HTML:

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

How it works

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

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

Updating abort-controller

When you update abort-controller, re-run npm install abort-controller-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 abort-controller 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/abort-controller/ and /node_modules/event-target-shim/ (its dependencies) and use babel-loader to transpile it on-the-fly.


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npm i abort-controller-es5

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