App/helpers/blurhash.ts

import { BaseItemDto } from "@jellyfin/sdk/lib/generated-client/models";

export function getPrimaryBlurhashFromDto(item: BaseItemDto) {
    const blurhashKey : string | undefined = 
                        item.ImageBlurHashes!.Primary 
                        ? Object.keys(item.ImageBlurHashes!.Primary)[0] 
                        : undefined;

    const blurhashValue : string | undefined = 
        blurhashKey 
        ? item.ImageBlurHashes!.Primary![blurhashKey!] 
        : undefined;

    return blurhashValue;
}