53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
JavaScript
import React, { useMemo } from 'react';
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import PropTypes from 'prop-types';
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import { ReactReduxContext } from './Context';
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import { createSubscription } from '../utils/Subscription';
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import { useIsomorphicLayoutEffect } from '../utils/useIsomorphicLayoutEffect';
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function Provider(_ref) {
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var store = _ref.store,
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context = _ref.context,
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children = _ref.children;
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var contextValue = useMemo(function () {
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var subscription = createSubscription(store);
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return {
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store: store,
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subscription: subscription
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};
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}, [store]);
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var previousState = useMemo(function () {
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return store.getState();
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}, [store]);
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useIsomorphicLayoutEffect(function () {
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var subscription = contextValue.subscription;
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subscription.onStateChange = subscription.notifyNestedSubs;
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subscription.trySubscribe();
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if (previousState !== store.getState()) {
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subscription.notifyNestedSubs();
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}
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return function () {
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subscription.tryUnsubscribe();
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subscription.onStateChange = null;
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};
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}, [contextValue, previousState]);
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var Context = context || ReactReduxContext;
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return /*#__PURE__*/React.createElement(Context.Provider, {
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value: contextValue
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}, children);
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}
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if (process.env.NODE_ENV !== 'production') {
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Provider.propTypes = {
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store: PropTypes.shape({
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subscribe: PropTypes.func.isRequired,
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dispatch: PropTypes.func.isRequired,
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getState: PropTypes.func.isRequired
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}),
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context: PropTypes.object,
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children: PropTypes.any
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};
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}
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export default Provider; |