trilium/src/public/app/services/note_attribute_cache.js

/**
 * Purpose of this class is to cache list of attributes for notes.
 *
 * Cache invalidation granularity is global - whenever a write operation is detected to notes, branches or attributes
 * we invalidate the whole cache. That's OK, since the purpose for this is to speed up batch read-only operations, such
 * as loading the tree which uses attributes heavily.
 */
class NoteAttributeCache {
    constructor() {
        this.attributes = {};
    }

    invalidate() {
        this.attributes = {};
    }
}

const noteAttributeCache = new NoteAttributeCache();

export default noteAttributeCache;