Super simple React hook for running abortable effects
npm install @closeio/use-abortable-effect 
Super simple React hook for running abortable effects based on the AbortController API.
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``bash`
yarn add @closeio/use-abortable-effect
- Extremely lightweight (less than 500B minzipped).
- It uses the AbortController API and it is compatible with the fetch API.
- If a browser does not support the AbortController API then the hook behaves exactly like a regular useEffect hook. See Can I Use for browser support overview.
- No other 3rd-party dependencies.
- API is compatible with useEffect,
where the effect function you pass-in accepts an AbortSignal instance as a param and you
can return a cleanup function that accepts an AbortController instance.
- Supports abortable fetch requests.
- Supports running custom operations/computations that can be easily aborted.
- Auto-aborts effects on re-run (or component unmount), unless you provide
a custom cleanup function.
`jsx
useEffect(() => {
// do something
return () => {
/ cleanup /
};
}, [deps]);
const abortControllerRef = useAbortableEffect(
(abortSignal) => {
// do something
return (abortController) => {
/ do cleanup, you should probably abort /
};
},
[deps],
);
`
`jsx
import React from 'react';
import useAbortableEffect from '@closeio/use-abortable-effect';
export default function MyAbortableFetchComponent() {
const abortControllerRef = useAbortableEffect((abortSignal) =>
fetch(url, { signal: abortSignal })
.then(/ … /)
.catch((rejection) => {
if (rejection.name !== 'AbortError') {
// Re-throw or handle non-abort rejection in another way.
return Promise.reject(rejection);
}
}),
);
const handleManualAbort = () => abortControllerRef.current.abort();
// …
}
`
`jsx
import React from 'react';
import useAbortableEffect from '@closeio/use-abortable-effect';
export default function MyAbortableComputationComponent() {
const abortControllerRef = useAbortableEffect(abortSignal => {
new Promise((resolve, reject) => {
// Should be a DOMException per spec.
const abortRejection = new DOMException(
'Calculation aborted by the user',
'AbortError',
);
// Handle when abort was requested before starting the computation.
if (abortSignal.aborted) {
return reject(abortRejection);
}
// This simulates an expensive computation.
const timeout = setTimeout(() => resolve(1), 5000);
// Listen for abort request.
abortSignal.addEventListener('abort', () => {
clearTimeout(timeout);
reject(abortRejection);
});
})
.then(/ … /)
.catch(rejection => {
if (rejection.name !== 'AbortError') {
// Re-throw or handle non-abort rejection in another way.
return Promise.reject(rejection);
}
}),
});
const handleManualAbort = () => abortControllerRef.current.abort();
// …
}
`
`jsx
import React from 'react';
import useAbortableEffect from '@closeio/use-abortable-effect';
export default function MyCustomCleanupComponent() {
const [gotAborted, setGotAborted] = useState(false);
const abortControllerRef = useAbortableEffect((abortSignal) => {
fetch(url, { signal: abortSignal })
.then(/ … /)
.catch((rejection) => {
if (rejection.name !== 'AbortError') {
// Re-throw or handle non-abort rejection in another way.
return Promise.reject(rejection);
}
});
// Just return a function like in useEffect, with the difference that you
// get the abort controller (not a ref) as a param.
return (controller) => {
controller.abort();
setGotAborted(true);
};
});
const handleManualAbort = () => abortControllerRef.current.abort();
// …
}
``
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