Question 1

How to use abortcontroller-polyfill with Internet Explorer 11?

Accepted Answer

Install promise-polyfill and a fetch polyfill like unfetch or whatwg-fetch, then import them in order: promise polyfill first, fetch polyfill next, and finally abortcontroller-polyfill. The README provides example code for IE11 setup.

Question 2

Does abortcontroller-polyfill actually cancel network requests?

Accepted Answer

No, it doesn't terminate the underlying HTTP connection. It patches fetch to respond to abort signals by calling .catch() with an AbortError, simulating abort behavior without stopping the request.

Question 3

abortcontroller-polyfill vs native AbortController: which is better?

Accepted Answer

Use native AbortController in modern browsers for real connection termination and performance. The polyfill is only necessary for compatibility with older browsers or environments lacking native support, as it adds overhead.

Question 4

How to set up abortcontroller-polyfill in Node.js with node-fetch?

Accepted Answer

Import the ponyfill from 'dist/cjs-ponyfill' and use abortableFetch to wrap node-fetch, or patch global fetch if preferred. The README includes Node.js examples with code snippets.

Question 5

How to fix ESLint errors for AbortController in create-react-app?

Accepted Answer

Add a declaration like 'const AbortController = window.AbortController;' to avoid no-undef errors. The README notes this workaround for create-react-app projects encountering linting issues.

Question 6

When should I avoid using abortcontroller-polyfill?

Accepted Answer

Avoid it if your app targets only modern browsers with native support, or if you need actual network abortion. Also, skip it if managing multiple polyfills is too heavy for your project's dependencies.

Question 7

How to import only the AbortSignal polyfill without patching fetch?

Accepted Answer

Use 'abortcontroller-polyfill/dist/abortsignal-polyfill-only' for environments with partial native implementations, as mentioned in the README's legacy webview section.

abortcontroller-polyfill

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