Pattern library

UI Patterns

A UI pattern library built for coding agents. 40 patterns, each shipping a copy-paste prompt that rebuilds it inside your own codebase — plus a live preview and the source behind it.

Every pattern, three ways

Preview

The pattern running live in an isolated frame, in whichever theme you are reading in.

Source

Its markup, styles and behaviour, plus a single runnable file carrying its own palette.

Prompt

A written spec that rebuilds the pattern from scratch — including why each decision is the way it is. Paste it into Claude Code, Cursor, or any coding agent.

The prompts are the point. Each one is written to survive being handed to an agent with no other context: it names the surfaces the pattern belongs on, spells out the constraint that makes it work, and calls out the failure it exists to prevent. Nothing here is a dependency you install.

All patterns

40 patterns

Data display

Windowed schedule grid

Added AUG 11 2026

Rows of resources against a fixed time window, where each block is sized by its overlap with the window rather than by its own duration.

  • schedule
  • timeline
  • grid
  • flexbox
Data display

Benchmark progress bar

Added AUG 11 2026

Places a raw figure on a scale of external benchmarks instead of printing it plain.

  • progress
  • benchmarks
  • css-only
  • data-viz
Data display

Cross-highlight matrix

Added AUG 11 2026

A two-axis lookup table with both headers sticky, hover lighting the full row and column at once, and a durable click-to-pin selection for touch.

  • table
  • matrix
  • sticky
  • accessibility
Data display

Left-truncating paths

Added AUG 11 2026

Shortens a long path by dropping whole segments from the left, because the tail is what tells two paths apart.

  • truncation
  • paths
  • text-overflow
  • breadcrumbs
Data displayUpdated

Shape-mark sequence

Updated AUG 21 2026

A sequence compressed into a row of small marks whose shape carries the state.

  • stepper
  • sparkline
  • series
  • truncation
Data display

Linked month bars

Added AUG 21 2026

A month-by-month volume timeline built from plain divs where every aggregate row links to the filtered view that produced it.

  • timeline
  • drill-down
  • css-only
  • data-viz
Data display

Glass vial meter

Added AUG 21 2026

A vertical potion-vial meter whose liquid fills a wide bulb first and then rises into a narrow neck — all CSS, no images.

  • meter
  • skeuomorphic
  • css-only
  • reduced-motion
Data display

Partitioned stage bar

Added SEP 12 2026

Progress for work with several possible endings, drawn as a census rather than a fraction.

  • progress
  • stacked-bar
  • batch
  • legend
Data display

Term-by-term derivation

Added SEP 12 2026

A computed figure shown with the audit trail behind it — the number is the product and the derivation is the receipt.

  • explainability
  • calculator
  • disclosure
  • formula
Data displayUpdated

Plan preview tree

Updated SEP 12 2026

A dry run shown as a before-and-after tree with counts now, after, and the difference.

  • dry-run
  • diff
  • tree
  • preview
Data display

Uniform slot shell

Added SEP 12 2026

One card shell many independent sources render through, where the shell does the capping.

  • dashboard
  • widgets
  • cards
  • empty-state
LayoutUpdated

Object-shaped cards

Updated AUG 11 2026

Where a record stands for a physical thing, the card is drawn as that thing — nine variations in pure gradients.

  • cards
  • css-only
  • gradients
  • variations
Layout

Adaptive tile mosaic

Added AUG 11 2026

A container with no artwork draws one from up to four member tiles, grid tracks following tile count.

  • css-grid
  • css-only
  • no-assets
  • cards
LayoutUpdated

Ground-scrimmed artwork

Updated AUG 11 2026

Text printed over unreviewed artwork, scrimmed to an alpha that can be written down rather than guessed.

  • layout
  • css-only
  • gradients
  • contrast
LayoutUpdated

Hairline stat strip

Updated AUG 21 2026

Stat tiles joined by hairlines that are grid gap, not borders.

  • stats
  • css-grid
  • css-only
  • hairline
Layout

Annotated transcript

Added AUG 21 2026

Conversation bubbles with a speaker-colored spine and a fixed metadata gutter.

  • conversation
  • gutter
  • status-roles
  • contrast
Layout

Cork notice board

Added AUG 21 2026

Pinned paper notes on a cork board where every texture is layered CSS gradients.

  • skeuomorphic
  • gradients
  • no-assets
  • cards
LayoutUpdated

Hotspot marker layer

Updated SEP 12 2026

Markers at percentage coordinates over a fixed-aspect picture, turning into a list when too narrow.

  • hotspots
  • pointer-events
  • aspect-ratio
  • container-query
Layout

Line-art empty states

Added SEP 12 2026

Inline drawings for empty surfaces stroked in the inherited text colour.

  • empty-state
  • svg
  • currentcolor
  • illustration
Layout

Column-flow wall

Added SEP 12 2026

Cards flowing down columns instead of across rows, with the reading-order cost stated plainly.

  • masonry
  • columns
  • break-inside
  • reading-order
Interaction

Scroll edge shadows

Added AUG 11 2026

An inset shadow shown only on the edge that has more content behind it.

  • scrolling
  • affordance
  • lists
  • overflow
Interaction

Frozen-batch deck

Added AUG 11 2026

A one-card-at-a-time review queue whose batch is snapshotted at mount.

  • queue
  • review-flow
  • animation
  • keyboard
InteractionUpdated

Controls beside the anchor

Updated AUG 11 2026

Per-card controls over a fully-linked card without nesting interactive elements in the anchor.

  • cards
  • accessibility
  • keyboard
  • focus-within
InteractionUpdated

Pluggable canvas visualizer

Updated AUG 11 2026

One canvas, a registry of draw modes, each mode owning its entire frame.

  • canvas
  • visualization
  • registry
  • animation
InteractionUpdated

Roving-grid board

Updated AUG 21 2026

A dense grid of state cells that is one tab stop with arrow-key navigation.

  • keyboard
  • roving-tabindex
  • accessibility
  • states
Interaction

Section rail

Added AUG 21 2026

Sticky vertical rail on wide screens, wrapping tab row on narrow ones, from the same markup.

  • navigation
  • toc
  • responsive
  • aria-current
Interaction

Ledge-press buttons

Added AUG 21 2026

Buttons on a solid ledge shadow that travel down onto it when pressed.

  • buttons
  • skeuomorphic
  • press
  • tokens
InteractionUpdated

Guarded control

Updated SEP 12 2026

A blocked control stays focusable, carries the reason as text, and refuses in its handler.

  • aria-disabled
  • disabled
  • preconditions
  • keyboard
InteractionUpdated

Polled job card

Updated SEP 12 2026

One card for every state a background job passes through.

  • progress
  • polling
  • background-job
  • indeterminate
Interaction

Entry-transform motion

Added SEP 12 2026

FLIP-style motion between two rendered states when the old DOM is already gone.

  • animation
  • transitions
  • reflow
  • reduced-motion
InteractionUpdated

Slot-first picker

Updated SEP 12 2026

Assignment that starts at the destination slot, then narrows the catalogue.

  • assignment
  • picker
  • aria-pressed
  • filtering
Forms

Undo toast

Added AUG 28 2026

A destructive action with no confirm dialog, held behind a toast and committed when it expires.

  • undo
  • toast
  • destructive
  • aria-live
FormsNew

Blast-radius confirm

Added SEP 28 2026

A confirm dialog that names everything a delete cascades and blocks dismissal while it runs.

  • confirm-dialog
  • destructive
  • cascade
  • dialog-element
FormsUpdated

Batch action bar

Updated AUG 28 2026

A bar that exists only while something is selected, states the count in words, caps at five actions.

  • selection
  • bulk-actions
  • toolbar
  • checkbox
Forms

Filtered to zero

Added SEP 12 2026

The three empty states a list actually has, written as three different screens.

  • empty-state
  • filter
  • search
  • zero-results
Forms

Parsed query chips

Added SEP 12 2026

A search box that echoes back how it read the text as removable chips.

  • search
  • query-syntax
  • chips
  • facets
Forms

Compound-value picker

Added SEP 12 2026

One grouped select whose value carries both the kind and the id.

  • select
  • optgroup
  • polymorphic
  • forms
ColorUpdated

Ground-referenced color

Updated AUG 11 2026

Colors solved against the page's own ground token so they invert correctly between themes.

  • color
  • contrast
  • color-mix
  • accessibility
ColorUpdated

Single-property color variants

Updated AUG 21 2026

One custom property carries the hue; border, fill, spine and dot derive from it.

  • color
  • color-mix
  • custom-properties
  • theming
ColorUpdated

Controls on an unknown fill

Updated SEP 12 2026

Opaque controls, a gradient-darkened fill, and a two-tone focus ring on a surface whose colour arrives from outside.

  • contrast
  • brand-color
  • focus-ring
  • opacity