Problem Statement

Currently, the Content Type Filter in Content Drive uses PrimeNG's p-multiselect component and requires users to search for Content Types. This can be cumbersome when users want to browse available Content Types without knowing the exact name.

Investigation Goal

Determine if virtual scroll can be implemented on the PrimeNG p-multiselect component to enable browsing all Content Types without requiring search functionality.

Research Areas

Technical Feasibility

• Review PrimeNG 17.18.11 p-multiselect virtual scroll capabilities
• Identify current Content Type Filter implementation (component location, data loading mechanism)
• Check if p-multiselect supports virtualScroll property and virtualScrollItemSize
• Assess data loading patterns (pagination, lazy loading, total content type count)
• Test virtual scroll with actual Content Type data structure

PrimeNG Virtual Scroll Configuration

• Investigate virtualScroll and virtualScrollItemSize properties
• Test virtualScrollOptions for custom behavior
• Evaluate compatibility with existing p-multiselect features (filtering, grouping, templates)
• Determine if lazy loading is needed for very large datasets

Performance Considerations

• Determine typical number of Content Types in production environments
• Measure current loading performance with large datasets (100+, 500+, 1000+ content types)
• Evaluate memory footprint with virtual scroll vs current implementation
• Test rendering performance with virtual scroll enabled

UX Implications

• Review current user workflow and pain points
• Evaluate how virtual scroll affects search/filter functionality
• Test scrolling behavior and user experience
• Consider accessibility requirements for virtual scroll
• Compare with other p-multiselect instances in dotCMS UI

Integration Requirements

• Identify required changes to backend APIs (if any)
• Evaluate impact on existing filter features (search, favorites, recent)
• Assess compatibility with current Content Drive architecture
• Test with custom item templates (if used)

Deliverables

• Technical findings document with:
  • PrimeNG virtual scroll capabilities and limitations
  • Recommended configuration and implementation approach
  • Implementation effort estimate
  • Performance benchmarks (with/without virtual scroll)
  • Potential risks and mitigation strategies
• Prototype or proof-of-concept demonstrating virtual scroll
• Decision: Go/No-Go recommendation with justification

Acceptance Criteria

• All research areas documented with findings
• PrimeNG virtual scroll feasibility clearly established
• Performance impact quantified with real data
• Implementation approach recommended (or reasons for not proceeding)
• Code examples or prototype provided
• Findings shared with team for decision-making

Time Box

This spike should be time-boxed to 1-3 hours of investigation.

Technical Context

• Component: PrimeNG p-multiselect (v17.18.11)
• Framework: Angular 19.2.9
• Feature: Content Drive - Content Type Filter

Related Components

• Content Drive
• Content Type Filter
• PrimeNG multiselect component