state-synchronizers/dist/create-synchronized-state-updater.js

Deterministically update state based on other state

"use strict";
exports.__esModule = true;
exports.createSynchronizedStateUpdater = void 0;
/**
 * @returns A state updater that runs the state synchronizer when the state changed. Caches the
 * previous state internally.
 */
exports.createSynchronizedStateUpdater = function (stateSynchronizer, initialState) {
    var previousState = initialState;
    return function (state) {
        if (state === previousState) {
            return state;
        }
        stateSynchronizer(state, previousState);
        previousState = state;
        return state;
    };
};