27 lines
1.7 KiB
JavaScript
27 lines
1.7 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(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
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function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != _typeof(e) && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
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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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} |