22 lines
724 B
TypeScript
22 lines
724 B
TypeScript
   
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/*
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Copyright 2025 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
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Please see LICENSE files in the repository root for full details.
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*/
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import { useSyncExternalStore } from "react";
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import { type ViewModel } from "./ViewModel";
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/**
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* A small wrapper around useSyncExternalStore to use a view model in a shared component view
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* @param vm The view model to use
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* @returns The current snapshot
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*/
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export function useViewModel<T>(vm: ViewModel<T>): T {
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// We need to pass the same getSnapshot function as getServerSnapshot as this
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// is used when making the HTML chat export.
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return useSyncExternalStore(vm.subscribe, vm.getSnapshot, vm.getSnapshot);
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}
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