27 lines
2.1 KiB
JavaScript
27 lines
2.1 KiB
JavaScript
"use strict";
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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var _typeof = require("@babel/runtime/helpers/typeof");
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = useSyncState;
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var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
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var React = _interopRequireWildcard(require("react"));
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function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
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function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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function useSyncState(defaultState, onChange) {
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var stateRef = React.useRef(defaultState);
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var _React$useState = React.useState({}),
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_React$useState2 = (0, _slicedToArray2.default)(_React$useState, 2),
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forceUpdate = _React$useState2[1];
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function setState(updater) {
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var newValue = typeof updater === 'function' ? updater(stateRef.current) : updater;
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if (newValue !== stateRef.current) {
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onChange(newValue, stateRef.current);
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}
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stateRef.current = newValue;
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forceUpdate({});
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}
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return [stateRef.current, setState];
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} |