Jesus sucks
This commit is contained in:
51
backend/frontend/node_modules/@restart/hooks/esm/useCustomEffect.js
generated
vendored
Normal file
51
backend/frontend/node_modules/@restart/hooks/esm/useCustomEffect.js
generated
vendored
Normal file
@@ -0,0 +1,51 @@
|
||||
import { useRef, useEffect, useDebugValue } from 'react';
|
||||
import useMounted from './useMounted';
|
||||
|
||||
/**
|
||||
* a useEffect() hook with customized depedency comparision
|
||||
*
|
||||
* @param effect The effect callback
|
||||
* @param dependencies A list of dependencies
|
||||
* @param isEqual A function comparing the next and previous dependencyLists
|
||||
*/
|
||||
|
||||
/**
|
||||
* a useEffect() hook with customized depedency comparision
|
||||
*
|
||||
* @param effect The effect callback
|
||||
* @param dependencies A list of dependencies
|
||||
* @param options
|
||||
* @param options.isEqual A function comparing the next and previous dependencyLists
|
||||
* @param options.effectHook the underlying effect hook used, defaults to useEffect
|
||||
*/
|
||||
|
||||
function useCustomEffect(effect, dependencies, isEqualOrOptions) {
|
||||
const isMounted = useMounted();
|
||||
const {
|
||||
isEqual,
|
||||
effectHook = useEffect
|
||||
} = typeof isEqualOrOptions === 'function' ? {
|
||||
isEqual: isEqualOrOptions
|
||||
} : isEqualOrOptions;
|
||||
const dependenciesRef = useRef();
|
||||
dependenciesRef.current = dependencies;
|
||||
const cleanupRef = useRef(null);
|
||||
effectHook(() => {
|
||||
// If the ref the is `null` it's either the first effect or the last effect
|
||||
// ran and was cleared, meaning _this_ update should run, b/c the equality
|
||||
// check failed on in the cleanup of the last effect.
|
||||
if (cleanupRef.current === null) {
|
||||
const cleanup = effect();
|
||||
cleanupRef.current = () => {
|
||||
if (isMounted() && isEqual(dependenciesRef.current, dependencies)) {
|
||||
return;
|
||||
}
|
||||
cleanupRef.current = null;
|
||||
if (cleanup) cleanup();
|
||||
};
|
||||
}
|
||||
return cleanupRef.current;
|
||||
});
|
||||
useDebugValue(effect);
|
||||
}
|
||||
export default useCustomEffect;
|
||||
Reference in New Issue
Block a user