@gravity-ui/graph/build/store/connection/selectors.js

Modern graph editor component

export function selectConnectionById(graph, id) {
    return graph.rootStore.connectionsList.$connectionsMap.value.get(id);
}
export function selectConnectionsByBlockId(graph, id) {
    return graph.rootStore.connectionsList.$connections.value.filter((connection) => [connection.targetBlockId, connection.sourceBlockId].includes(id));
}