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.

40 patterns

Data display

Added Aug 11, 2026

Windowed schedule grid

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.

scheduletimelinegridflexbox
Data display

Added Aug 11, 2026

Benchmark progress bar

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

progressbenchmarkscss-onlydata-viz
Data display

Added Aug 11, 2026

Cross-highlight matrix

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.

tablematrixstickyaccessibility
Data display

Added Aug 11, 2026

Left-truncating paths

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

truncationpathstext-overflowbreadcrumbs
Data display

Updated Aug 21, 2026Updated

Shape-mark sequence

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

steppersparklineseriestruncation
Data display

Added Aug 21, 2026

Linked month bars

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

timelinedrill-downcss-onlydata-viz
Data display

Added Aug 21, 2026

Glass vial meter

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

meterskeuomorphiccss-onlyreduced-motion
Data display

Added Sep 12, 2026

Partitioned stage bar

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

progressstacked-barbatchlegend
Data display

Added Sep 12, 2026

Term-by-term derivation

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

explainabilitycalculatordisclosureformula
Data display

Updated Sep 12, 2026Updated

Plan preview tree

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

dry-rundifftreepreview
Data display

Added Sep 12, 2026

Uniform slot shell

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

dashboardwidgetscardsempty-state
Layout

Updated Aug 11, 2026Updated

Object-shaped cards

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

cardscss-onlygradientsvariations
Layout

Added Aug 11, 2026

Adaptive tile mosaic

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

css-gridcss-onlyno-assetscards
Layout

Updated Aug 11, 2026Updated

Ground-scrimmed artwork

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

layoutcss-onlygradientscontrast
Layout

Updated Aug 21, 2026Updated

Hairline stat strip

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

statscss-gridcss-onlyhairline
Layout

Added Aug 21, 2026

Annotated transcript

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

conversationgutterstatus-rolescontrast
Layout

Added Aug 21, 2026

Cork notice board

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

skeuomorphicgradientsno-assetscards
Layout

Updated Sep 12, 2026Updated

Hotspot marker layer

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

hotspotspointer-eventsaspect-ratiocontainer-query
Layout

Added Sep 12, 2026

Line-art empty states

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

empty-statesvgcurrentcolorillustration
Layout

Added Sep 12, 2026

Column-flow wall

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

masonrycolumnsbreak-insidereading-order
Interaction

Added Aug 11, 2026

Scroll edge shadows

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

scrollingaffordancelistsoverflow
Interaction

Added Aug 11, 2026

Frozen-batch deck

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

queuereview-flowanimationkeyboard
Interaction

Updated Aug 11, 2026Updated

Controls beside the anchor

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

cardsaccessibilitykeyboardfocus-within
Interaction

Updated Aug 11, 2026Updated

Pluggable canvas visualizer

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

canvasvisualizationregistryanimation
Interaction

Updated Aug 21, 2026Updated

Roving-grid board

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

keyboardroving-tabindexaccessibilitystates
Interaction

Added Aug 21, 2026

Section rail

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

navigationtocresponsivearia-current
Interaction

Added Aug 21, 2026

Ledge-press buttons

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

buttonsskeuomorphicpresstokens
Interaction

Updated Sep 12, 2026Updated

Guarded control

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

aria-disableddisabledpreconditionskeyboard
Interaction

Updated Sep 12, 2026Updated

Polled job card

One card for every state a background job passes through.

progresspollingbackground-jobindeterminate
Interaction

Added Sep 12, 2026

Entry-transform motion

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

animationtransitionsreflowreduced-motion
Interaction

Updated Sep 12, 2026Updated

Slot-first picker

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

assignmentpickeraria-pressedfiltering
Forms

Added Aug 28, 2026

Undo toast

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

undotoastdestructivearia-live
Forms

Added Sep 28, 2026New

Blast-radius confirm

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

confirm-dialogdestructivecascadedialog-element
Forms

Updated Aug 28, 2026Updated

Batch action bar

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

selectionbulk-actionstoolbarcheckbox
Forms

Added Sep 12, 2026

Filtered to zero

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

empty-statefiltersearchzero-results
Forms

Added Sep 12, 2026

Parsed query chips

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

searchquery-syntaxchipsfacets
Forms

Added Sep 12, 2026

Compound-value picker

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

selectoptgrouppolymorphicforms
Color

Updated Aug 11, 2026Updated

Ground-referenced color

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

colorcontrastcolor-mixaccessibility
Color

Updated Aug 21, 2026Updated

Single-property color variants

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

colorcolor-mixcustom-propertiestheming
Color

Updated Sep 12, 2026Updated

Controls on an unknown fill

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

contrastbrand-colorfocus-ringopacity