Filtering and Sorting System Template

If your dataset is under 5,000 records and the payload size is manageable (under 2 MB), client-side filtering gives instant results with zero network latency. Above that, use server-side filtering with API pagination. Some products use a hybrid: load the first page server-side, then filter client-side within the loaded set, fetching more data only when the user scrolls or changes pages. For related implementation details on search indexing, the [Search Relevance Template](/templates/search-relevance-template) covers backend index design.

The cleanest pattern is the filter builder with grouped conditions. Each group is joined by AND. Within a group, conditions are joined by OR. Visually, this looks like indented condition rows inside a container. Keep AND-only as the default mode and let users switch to "advanced" mode when they need OR grouping. Most users (80%+) will never need OR logic.

Yes, for power users in data-heavy products. Multi-sort (up to 3 levels) is expected in CRM, project management, and analytics tools. Implement it as "hold Shift + click column header" for keyboard users or a sort builder panel. Single-column sort should remain the default interaction.

Separate personal views from shared views. Personal views are visible only to the creator. Shared views are visible to everyone in the workspace. Shared views should require naming conventions or admin approval to prevent clutter. Allow users to "pin" their most-used views to a tab bar for quick switching. The [product strategy document template](/templates/product-strategy-document-template) can help plan which view capabilities map to different user tiers.

Use query parameters with descriptive names: `?status=active&amount_gte=10000&sort=-amount`. This is human-readable, easy to share, and straightforward to parse. Avoid encoding filter state as a single opaque parameter (e.g., `?filters=base64encoded`) because it breaks readability and debugging. ---