@closeio/use-abortable-effect
v1.0.0
Published
Super simple React hook for running abortable effects
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use-abortable-effect
Super simple React hook for running abortable effects based on the AbortController
API.
Interested in working on projects like this? Close is looking for great engineers to join our team!
Install
yarn add @closeio/use-abortable-effect
Benefits
- Extremely lightweight (less than 500B minzipped).
- It uses the
AbortController
API and it is compatible with thefetch
API. - If a browser does not support the
AbortController
API then the hook behaves exactly like a regularuseEffect
hook. See Can I Use for browser support overview. - No other 3rd-party dependencies.
API differences over useEffect
- API is compatible with
useEffect
, where the effect function you pass-in accepts anAbortSignal
instance as a param and you can return a cleanup function that accepts anAbortController
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.
useEffect(() => {
// do something
return () => {
/* cleanup */
};
}, [deps]);
const abortControllerRef = useAbortableEffect(
(abortSignal) => {
// do something
return (abortController) => {
/* do cleanup, you should probably abort */
};
},
[deps],
);
Usage
Abortable fetch
requests
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();
// …
}
Arbitrary computation that can be aborted
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();
// …
}
Custom cleanup function
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();
// …
}
License
MIT © Close