62 lines
1.8 KiB
JavaScript
62 lines
1.8 KiB
JavaScript
"use strict";
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");
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exports.__esModule = true;
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exports["default"] = void 0;
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var _react = _interopRequireWildcard(require("react"));
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var _propTypes = _interopRequireDefault(require("prop-types"));
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var _Context = require("./Context");
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var _Subscription = _interopRequireDefault(require("../utils/Subscription"));
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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 = (0, _react.useMemo)(function () {
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var subscription = new _Subscription["default"](store);
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subscription.onStateChange = subscription.notifyNestedSubs;
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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 = (0, _react.useMemo)(function () {
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return store.getState();
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}, [store]);
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(0, _react.useEffect)(function () {
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var subscription = contextValue.subscription;
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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 || _Context.ReactReduxContext;
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return _react["default"].createElement(Context.Provider, {
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value: contextValue
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}, children);
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}
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Provider.propTypes = {
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store: _propTypes["default"].shape({
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subscribe: _propTypes["default"].func.isRequired,
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dispatch: _propTypes["default"].func.isRequired,
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getState: _propTypes["default"].func.isRequired
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}),
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context: _propTypes["default"].object,
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children: _propTypes["default"].any
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};
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var _default = Provider;
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exports["default"] = _default; |