mobx-react-lite/es/utils/createReactionCleanupTrackingUsingFinalizationRegister.js

Lightweight React bindings for MobX based on React 16.8+ and Hooks

import { createTrackingData } from "./reactionCleanupTrackingCommon";
/**
 * FinalizationRegistry-based uncommitted reaction cleanup
 */
export function createReactionCleanupTrackingUsingFinalizationRegister(FinalizationRegistry) {
    var cleanupTokenToReactionTrackingMap = new Map();
    var globalCleanupTokensCounter = 1;
    var registry = new FinalizationRegistry(function cleanupFunction(token) {
        var trackedReaction = cleanupTokenToReactionTrackingMap.get(token);
        if (trackedReaction) {
            trackedReaction.reaction.dispose();
            cleanupTokenToReactionTrackingMap.delete(token);
        }
    });
    return {
        addReactionToTrack: function (reactionTrackingRef, reaction, objectRetainedByReact) {
            var token = globalCleanupTokensCounter++;
            registry.register(objectRetainedByReact, token, reactionTrackingRef);
            reactionTrackingRef.current = createTrackingData(reaction);
            reactionTrackingRef.current.finalizationRegistryCleanupToken = token;
            cleanupTokenToReactionTrackingMap.set(token, reactionTrackingRef.current);
            return reactionTrackingRef.current;
        },
        recordReactionAsCommitted: function (reactionRef) {
            registry.unregister(reactionRef);
            if (reactionRef.current && reactionRef.current.finalizationRegistryCleanupToken) {
                cleanupTokenToReactionTrackingMap.delete(reactionRef.current.finalizationRegistryCleanupToken);
            }
        },
        forceCleanupTimerToRunNowForTests: function () {
            // When FinalizationRegistry in use, this this is no-op
        },
        resetCleanupScheduleForTests: function () {
            // When FinalizationRegistry in use, this this is no-op
        }
    };
}
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