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- {"ast":null,"code":"import { useReducer, useRef, useMemo, useContext, useDebugValue } from 'react';\nimport { useReduxContext as useDefaultReduxContext } from './useReduxContext';\nimport { createSubscription } from '../utils/Subscription';\nimport { useIsomorphicLayoutEffect } from '../utils/useIsomorphicLayoutEffect';\nimport { ReactReduxContext } from '../components/Context';\n\nvar refEquality = function refEquality(a, b) {\n return a === b;\n};\n\nfunction useSelectorWithStoreAndSubscription(selector, equalityFn, store, contextSub) {\n var _useReducer = useReducer(function (s) {\n return s + 1;\n }, 0),\n forceRender = _useReducer[1];\n\n var subscription = useMemo(function () {\n return createSubscription(store, contextSub);\n }, [store, contextSub]);\n var latestSubscriptionCallbackError = useRef();\n var latestSelector = useRef();\n var latestStoreState = useRef();\n var latestSelectedState = useRef();\n var storeState = store.getState();\n var selectedState;\n\n try {\n if (selector !== latestSelector.current || storeState !== latestStoreState.current || latestSubscriptionCallbackError.current) {\n var newSelectedState = selector(storeState); // ensure latest selected state is reused so that a custom equality function can result in identical references\n\n if (latestSelectedState.current === undefined || !equalityFn(newSelectedState, latestSelectedState.current)) {\n selectedState = newSelectedState;\n } else {\n selectedState = latestSelectedState.current;\n }\n } else {\n selectedState = latestSelectedState.current;\n }\n } catch (err) {\n if (latestSubscriptionCallbackError.current) {\n err.message += \"\\nThe error may be correlated with this previous error:\\n\" + latestSubscriptionCallbackError.current.stack + \"\\n\\n\";\n }\n\n throw err;\n }\n\n useIsomorphicLayoutEffect(function () {\n latestSelector.current = selector;\n latestStoreState.current = storeState;\n latestSelectedState.current = selectedState;\n latestSubscriptionCallbackError.current = undefined;\n });\n useIsomorphicLayoutEffect(function () {\n function checkForUpdates() {\n try {\n var newStoreState = store.getState(); // Avoid calling selector multiple times if the store's state has not changed\n\n if (newStoreState === latestStoreState.current) {\n return;\n }\n\n var _newSelectedState = latestSelector.current(newStoreState);\n\n if (equalityFn(_newSelectedState, latestSelectedState.current)) {\n return;\n }\n\n latestSelectedState.current = _newSelectedState;\n latestStoreState.current = newStoreState;\n } catch (err) {\n // we ignore all errors here, since when the component\n // is re-rendered, the selectors are called again, and\n // will throw again, if neither props nor store state\n // changed\n latestSubscriptionCallbackError.current = err;\n }\n\n forceRender();\n }\n\n subscription.onStateChange = checkForUpdates;\n subscription.trySubscribe();\n checkForUpdates();\n return function () {\n return subscription.tryUnsubscribe();\n };\n }, [store, subscription]);\n return selectedState;\n}\n/**\n * Hook factory, which creates a `useSelector` hook bound to a given context.\n *\n * @param {React.Context} [context=ReactReduxContext] Context passed to your `<Provider>`.\n * @returns {Function} A `useSelector` hook bound to the specified context.\n */\n\n\nexport function createSelectorHook(context) {\n if (context === void 0) {\n context = ReactReduxContext;\n }\n\n var useReduxContext = context === ReactReduxContext ? useDefaultReduxContext : function () {\n return useContext(context);\n };\n return function useSelector(selector, equalityFn) {\n if (equalityFn === void 0) {\n equalityFn = refEquality;\n }\n\n if (process.env.NODE_ENV !== 'production') {\n if (!selector) {\n throw new Error(\"You must pass a selector to useSelector\");\n }\n\n if (typeof selector !== 'function') {\n throw new Error(\"You must pass a function as a selector to useSelector\");\n }\n\n if (typeof equalityFn !== 'function') {\n throw new Error(\"You must pass a function as an equality function to useSelector\");\n }\n }\n\n var _useReduxContext = useReduxContext(),\n store = _useReduxContext.store,\n contextSub = _useReduxContext.subscription;\n\n var selectedState = useSelectorWithStoreAndSubscription(selector, equalityFn, store, contextSub);\n useDebugValue(selectedState);\n return selectedState;\n };\n}\n/**\n * A hook to access the redux store's state. 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{ useReducer, useRef, useMemo, useContext, useDebugValue } from 'react';\nimport { useReduxContext as useDefaultReduxContext } from './useReduxContext';\nimport { createSubscription } from '../utils/Subscription';\nimport { useIsomorphicLayoutEffect } from '../utils/useIsomorphicLayoutEffect';\nimport { ReactReduxContext } from '../components/Context';\n\nvar refEquality = function refEquality(a, b) {\n return a === b;\n};\n\nfunction useSelectorWithStoreAndSubscription(selector, equalityFn, store, contextSub) {\n var _useReducer = useReducer(function (s) {\n return s + 1;\n }, 0),\n forceRender = _useReducer[1];\n\n var subscription = useMemo(function () {\n return createSubscription(store, contextSub);\n }, [store, contextSub]);\n var latestSubscriptionCallbackError = useRef();\n var latestSelector = useRef();\n var latestStoreState = useRef();\n var latestSelectedState = useRef();\n var storeState = store.getState();\n var selectedState;\n\n try {\n if (selector !== 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undefined;\n });\n useIsomorphicLayoutEffect(function () {\n function checkForUpdates() {\n try {\n var newStoreState = store.getState(); // Avoid calling selector multiple times if the store's state has not changed\n\n if (newStoreState === latestStoreState.current) {\n return;\n }\n\n var _newSelectedState = latestSelector.current(newStoreState);\n\n if (equalityFn(_newSelectedState, latestSelectedState.current)) {\n return;\n }\n\n latestSelectedState.current = _newSelectedState;\n latestStoreState.current = newStoreState;\n } catch (err) {\n // we ignore all errors here, since when the component\n // is re-rendered, the selectors are called again, and\n // will throw again, if neither props nor store state\n // changed\n latestSubscriptionCallbackError.current = err;\n }\n\n forceRender();\n }\n\n subscription.onStateChange = checkForUpdates;\n subscription.trySubscribe();\n checkForUpdates();\n return function () {\n return subscription.tryUnsubscribe();\n };\n }, [store, subscription]);\n return selectedState;\n}\n/**\n * Hook factory, which creates a `useSelector` hook bound to a given context.\n *\n * @param {React.Context} [context=ReactReduxContext] Context passed to your `<Provider>`.\n * @returns {Function} A `useSelector` hook bound to the specified context.\n */\n\n\nexport function createSelectorHook(context) {\n if (context === void 0) {\n context = ReactReduxContext;\n }\n\n var useReduxContext = context === ReactReduxContext ? useDefaultReduxContext : function () {\n return useContext(context);\n };\n return function useSelector(selector, equalityFn) {\n if (equalityFn === void 0) {\n equalityFn = refEquality;\n }\n\n if (process.env.NODE_ENV !== 'production') {\n if (!selector) {\n throw new Error(\"You must pass a selector to useSelector\");\n }\n\n if (typeof selector !== 'function') {\n throw new Error(\"You must pass a function as a selector to useSelector\");\n }\n\n if (typeof equalityFn !== 'function') {\n throw new Error(\"You must pass a function as an equality function to useSelector\");\n }\n }\n\n var _useReduxContext = useReduxContext(),\n store = _useReduxContext.store,\n contextSub = _useReduxContext.subscription;\n\n var selectedState = useSelectorWithStoreAndSubscription(selector, equalityFn, store, contextSub);\n useDebugValue(selectedState);\n return selectedState;\n };\n}\n/**\n * A hook to access the redux store's state. This hook takes a selector function\n * as an argument. The selector is called with the store state.\n *\n * This hook takes an optional equality comparison function as the second parameter\n * that allows you to customize the way the selected state is compared to determine\n * whether the component needs to be re-rendered.\n *\n * @param {Function} selector the selector function\n * @param {Function=} equalityFn the function that will be used to determine equality\n *\n * @returns {any} the selected state\n *\n * @example\n *\n * import React from 'react'\n * import { useSelector } from 'react-redux'\n *\n * export const CounterComponent = () => {\n * const counter = useSelector(state => state.counter)\n * return <div>{counter}</div>\n * }\n */\n\nexport var useSelector = /*#__PURE__*/createSelectorHook();"]},"metadata":{},"sourceType":"module"}
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