56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
"use strict";
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exports.__esModule = true;
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exports.default = void 0;
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var _react = require("react");
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var _useMounted = _interopRequireDefault(require("./useMounted"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* a useEffect() hook with customized depedency comparision
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*
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* @param effect The effect callback
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* @param dependencies A list of dependencies
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* @param isEqual A function comparing the next and previous dependencyLists
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*/
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/**
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* a useEffect() hook with customized depedency comparision
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*
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* @param effect The effect callback
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* @param dependencies A list of dependencies
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* @param options
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* @param options.isEqual A function comparing the next and previous dependencyLists
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* @param options.effectHook the underlying effect hook used, defaults to useEffect
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*/
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function useCustomEffect(effect, dependencies, isEqualOrOptions) {
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const isMounted = (0, _useMounted.default)();
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const {
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isEqual,
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effectHook = _react.useEffect
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} = typeof isEqualOrOptions === 'function' ? {
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isEqual: isEqualOrOptions
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} : isEqualOrOptions;
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const dependenciesRef = (0, _react.useRef)();
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dependenciesRef.current = dependencies;
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const cleanupRef = (0, _react.useRef)(null);
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effectHook(() => {
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// If the ref the is `null` it's either the first effect or the last effect
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// ran and was cleared, meaning _this_ update should run, b/c the equality
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// check failed on in the cleanup of the last effect.
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if (cleanupRef.current === null) {
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const cleanup = effect();
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cleanupRef.current = () => {
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if (isMounted() && isEqual(dependenciesRef.current, dependencies)) {
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return;
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}
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cleanupRef.current = null;
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if (cleanup) cleanup();
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};
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}
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return cleanupRef.current;
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});
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(0, _react.useDebugValue)(effect);
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}
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var _default = useCustomEffect;
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exports.default = _default; |