# Diff table > The edits an assistant proposes to a table, shown in the table itself: removals struck through in red, additions sliding in green, each one a toggle. A small table that takes an assistant’s proposal in place. The rows it would remove turn red and are struck through, the rows it would add open in green, and each change carries a box. A press anywhere on a changed row leaves it out or brings it back, the footer counts what is still ticked, and Apply turns the footer into a green “3 edits applied” pill. A React component by Bruno Delorence: https://brunodelorence.com/components/diff-table. MIT License, Copyright (c) 2026 Bruno Delorence. Category: AI. ## Anatomy 1. **Card**: The title bar, the table and the footer in one card, 380 px at most, with a ring and soft layered shadows. 2. **Hint**: A quiet line beside the title, shown only while the changes can be toggled; it truncates before the title does. 3. **Header row**: The column labels, set by `columns`, each with its share of the width. 4. **Removal row**: Tinted red, its words red and the last cell struck through; its tag fades to 55%. Unticked, it is an ordinary row again. 5. **Addition row**: Opens in green by its grid row (0fr to 1fr, 200 ms), so its height is never measured. Unticked, it stays, greyed. 6. **Checkbox**: A real checkbox, visually hidden behind this box, so Tab and Space work; a press anywhere on the row flips it too. 7. **Tag**: A small sunken pill with a dot in the row’s `tone`, for the column of kind `tag`. 8. **Footer**: Counts what is still ticked and applies just that. The button is disabled at zero. ## When to use - An assistant proposes edits to rows of data and the person should see them in the table itself. - A handful of changes, up to ten or so, that can each be kept or left out on its own. - Removals and additions to records with a short name: products, members, rows of a sheet. - In a chat or a side panel, where the proposal waits for one press of Apply before anything changes. ## When not to use - Edits inside a cell, word by word. Use a text diff with the changed words marked. - Hundreds of changes. Show a summary and a filterable list, not every row in a card. - Changes that only make sense together (a rename and its references). Ask once with a confirmation. - Edits already made. Say what changed with a toast and an Undo instead. - Code or long files: a side-by-side or unified diff reads better than a table. ## Installation Install it with the shadcn CLI, into components/diff-table of any React project: ```sh npx shadcn@latest add https://brunodelorence.com/r/diff-table.json ``` Or copy all the source files below into one folder of your project. Either way it needs React 19.2 and a bundler with CSS Modules (Next.js, Vite). It has a dark colour scheme. Its colours are CSS light-dark() pairs, kept inside @supports so that builds which rewrite light-dark() for older browsers leave them alone: it follows your page’s color-scheme (light unless the page sets one) or its colorScheme prop, with nothing to configure. Browsers without light-dark() show it light. ## Usage ```tsx import { DiffTable, type DiffRow } from './diff-table'; const columns = [ { key: 'name', label: 'Name', width: '40%', kind: 'name' as const }, { key: 'team', label: 'Team', width: '28%', kind: 'tag' as const }, { key: 'email', label: 'Email', width: '32%', kind: 'text' as const }, ]; export function ProposedCleanup({ rows, onApply }: { rows: DiffRow[]; onApply: (ids: string[]) => void }) { return ( onApply([...removed, ...added].map((row) => row.id))} /> ); } ``` ## States - **Before the proposal**: The table as it stands: the rows to add are folded away, nothing can be toggled yet. - **Removals marked**: The first beat, 900 ms after the table is seen: the rows to remove tint red. - **Proposed**: 260 ms later the boxes, the hint, the green addition and the footer arrive, all ticked. - **Some left out**: One removal back to an ordinary row and the addition greyed: Apply counts what is left. - **Nothing ticked**: Every change left out: the button reads Apply 0 changes and is disabled. - **Applied**: The table freezes as it stands and a green pill pops in where the footer was. ## How it works - The proposal arrives in two beats once the table is first on screen: 900 ms in, the rows to remove tint red (background 150 ms, words 200 ms, their tag fading to 55 %), then 260 ms later the boxes, the hint and the footer appear together while the rows to add open. - A row being added sits in a full-width cell whose grid goes from grid-template-rows: 0fr to 1fr, with its opacity, over 200 ms on cubic-bezier(0.23, 1, 0.32, 1). The row inside is clipped while it grows, so its height is never measured and any content opens the same way. - The footer rises 8 px as it fades in (180 ms, same ease-out); once applied, its contents swap for a pill that pops in from 95 % over 180 ms. - Each change’s box is a real checkbox, visually hidden behind an 18 px drawn box; the row around it is the target, so a press anywhere on it flips the change, and the row draws the focus ring for the checkbox inside with :has(:focus-visible). - An unticked removal goes back to an ordinary row; an unticked addition stays in place but greyed, so the reader still sees what was offered. The box un-ticks by colour and a 0.92 scale on 150 ms. - The counts are derived from the ticked set on every render: “2 removals · 1 addition”, “Apply 3 changes”, with singulars and a disabled button at zero. Applying hands onApply the rows themselves, removed and added, and freezes the table as it stands. - While on screen and untouched, a demo leaves the addition out, then a removal, takes both back, presses Apply, and after a pause clears the table and proposes again. Its toggles never reach onChange or onApply; any key or press hands the table to the reader. - Every colour is a light-dark() token on the root, so the table follows the page’s color-scheme or the colorScheme prop. Removals and additions are tints of the same red and green as their words: translucent at night, solid pale colours by day. ## API reference - **rows** (`DiffRow[]`, default `four sample flavours`): The rows, in order: { id, cells, change?, tone? }. cells holds each column’s value by key; change is 'remove' or 'add' for a proposed edit; tone colours the dot in the row’s tags (blue, grey, green or red). - **columns** (`DiffColumn[]`, default `Flavor, Category, Supplier`): The columns: { key, label, width, kind? }. kind 'name' is the strong first cell, 'tag' a small pill with a dot, 'text' a quiet value; the last column carries the boxes. - **defaultState** (`DiffTableState`): Opens held in a phase ('idle', 'marked', 'proposed' or 'applied'), with no sweep in, and with the ticked changes’ ids (all by default). Turns the demo off. - **onApply** (`(selection: DiffSelection) => void`): Called when the reader applies, with the ticked rows: { removed, added }. - **onChange** (`(ids: string[]) => void`): Called with the ids of the ticked changes whenever the reader toggles one. - **title** (`string`, default `'Proposed menu cleanup'`): The card’s title. - **hint** (`string`, default `'Click changed rows to toggle'`): The quiet line beside the title while the changes can be toggled. - **summaryLabel** (`(removals: number, additions: number) => string`, default `“2 removals · 1 addition”`): The footer’s count of the ticked changes. - **applyLabel** (`(count: number) => string`, default `“Apply 3 changes”`): The button’s words. - **appliedLabel** (`(count: number) => string`, default `“3 edits applied”`): The pill shown once the changes are applied. - **reveal** (`boolean`, default `true`): The proposal arrives in its two beats once the table is first on screen; false shows it at once. - **autoplay** (`boolean`, default `true`): While on screen and untouched, a demo toggles a few rows, applies, and proposes again. - **colorScheme** (`'light' | 'dark' | 'system'`): Its colours: light, dark, or the reader’s system setting. Without it the component follows the page’s color-scheme, which is light unless the page sets one. - **className** (`string`): Extra class for the root. ## Accessibility - It is a real table with column headers, inside a section named by the title. Each change has a native checkbox named for what it does (“Remove Rocky Road”, “Add Pistachio”), so a screen reader hears the change and its state. - Tab reaches each change; Space or Enter flips it, and the whole row shows a 1 px accent focus ring. Apply is a button, disabled when nothing is ticked, with its own focus ring. - A polite live region says the new count after each toggle (“1 removal · 1 addition”) and “3 edits applied” once applied; the demo’s toggles are not announced. - Once applied the checkboxes are disabled, so the table reads as final. - Under reduced motion the proposal is shown at once, rows change colour and open without transitions, the footer and pill appear without their entrance, and the demo never plays. ## Source ### diff-table/diff-table.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. 'use client'; import { useEffect, useRef, useState, type CSSProperties, type MouseEvent } from 'react'; import { useAutoplay } from './use-autoplay'; import styles from './diff-table.module.css'; /* * Diff table: the edits an assistant proposes to a table, shown in the table itself. Rows it * would remove turn red and are struck through, rows it would add slide in green, and each * change has a box the reader unticks to leave it out before applying the rest. * * - The proposal arrives in two beats once the table is on screen: 900 ms in, the rows to remove * tint red (background 150 ms, words 200 ms, their tag fading to 55 %); 260 ms later the boxes, * the hint and the footer appear, and the rows to add open by grid-template-rows 0fr → 1fr * (200 ms on a soft ease-out), so their height is never measured. * - A changed row is one big toggle: a press anywhere on it ticks or unticks its box. The box is * a real checkbox, visually hidden, so Tab reaches it and Space or Enter flips it; the row draws * the focus ring around itself. * - An unticked removal goes back to an ordinary row; an unticked addition stays in place, greyed. * The footer counts what is still ticked and the button applies just that. * - Applying freezes the table as it stands and swaps the footer's contents for a green * "3 edits applied" pill that pops in (180 ms, from 95 %). * - While on screen and untouched, a demo unticks and reticks a couple of rows, applies, then * clears the table and proposes again. Any real input hands the table to the reader. * - defaultState opens it in a phase, with chosen changes ticked, and holds it there (no sweep in, * no demo): for docs and tests. * - Light or dark: every colour is a light-dark() token in the CSS, so the scheme is the page's * color-scheme, or the one the colorScheme prop sets. */ export type DiffTone = 'blue' | 'grey' | 'green' | 'red'; export type DiffColumn = { key: string; label: string; /** Its share of the table's width, as a CSS length (e.g. '34%'). */ width: string; /** 'name' is the row's strong first cell, 'tag' a small pill with a dot, 'text' a quiet value. */ kind?: 'name' | 'tag' | 'text'; }; export type DiffRow = { id: string; /** What the proposal does to the row; without it the row is left as it is. */ change?: 'remove' | 'add'; /** The row's values by column key. */ cells: Record; /** The colour of the dot in the row's tags. */ tone?: DiffTone; }; /** The changes left ticked, as handed to onApply. */ export type DiffSelection = { removed: DiffRow[]; added: DiffRow[] }; const COLUMNS: DiffColumn[] = [ { key: 'flavor', label: 'Flavor', width: '34%', kind: 'name' }, { key: 'category', label: 'Category', width: '30%', kind: 'tag' }, { key: 'supplier', label: 'Supplier', width: '36%', kind: 'text' }, ]; const ROWS: DiffRow[] = [ { id: 'rocky-road', change: 'remove', tone: 'blue', cells: { flavor: 'Rocky Road', category: 'Classic', supplier: 'aurora-scoops' }, }, { id: 'bubblegum', change: 'remove', tone: 'grey', cells: { flavor: 'Bubblegum', category: 'Retro', supplier: 'kumo-creamery' }, }, { id: 'mint-chip', tone: 'blue', cells: { flavor: 'Mint Chip', category: 'Classic', supplier: 'maple-orbit' }, }, { id: 'pistachio', change: 'add', tone: 'green', cells: { flavor: 'Pistachio', category: 'Seasonal', supplier: 'maple-orbit' }, }, ]; const plural = (count: number, word: string) => `${count} ${word}${count === 1 ? '' : 's'}`; /** Before the proposal, while the removals tint, once it is all shown, and once applied. */ type Phase = 'idle' | 'marked' | 'proposed' | 'applied'; /** * Where the table opens. A phase holds there (no sweep in); ticked lists the changes left ticked * (all of them when left out). Either one turns the demo off. */ export type DiffTableState = { phase?: Phase; ticked?: string[] }; /** The proposal's two beats: the removals tint, then the rest arrives. */ const MARK = 900; const PROPOSE = 260; const changed = (rows: DiffRow[]) => new Set(rows.filter((row) => row.change).map((row) => row.id)); export function DiffTable({ columns = COLUMNS, rows = ROWS, title = 'Proposed menu cleanup', hint = 'Click changed rows to toggle', summaryLabel = (removals, additions) => `${plural(removals, 'removal')} · ${plural(additions, 'addition')}`, applyLabel = (count) => `Apply ${plural(count, 'change')}`, appliedLabel = (count) => `${plural(count, 'edit')} applied`, onApply, onChange, reveal = true, autoplay = true, colorScheme, defaultState, className = '', }: { columns?: DiffColumn[]; /** The table's rows, the proposed changes among them. */ rows?: DiffRow[]; title?: string; /** The quiet line beside the title while changes can be toggled. */ hint?: string; /** The footer's count of the ticked changes. */ summaryLabel?: (removals: number, additions: number) => string; applyLabel?: (count: number) => string; /** The pill shown once the changes are applied. */ appliedLabel?: (count: number) => string; /** Called with the ticked changes when the reader applies them. */ onApply?: (selection: DiffSelection) => void; /** Called with the ids of the ticked changes whenever the reader toggles one. */ onChange?: (ids: string[]) => void; /** The proposal sweeps in once the table is first on screen; false shows it at once. */ reveal?: boolean; /** While on screen and untouched, a demo toggles a few rows, applies, and proposes again. */ autoplay?: boolean; /** Light or dark colours, or the reader's ('system'); without it, the page's color-scheme. */ colorScheme?: 'light' | 'dark' | 'system'; /** Opens in a given phase and with given changes ticked; turns the demo off. */ defaultState?: DiffTableState; className?: string; }) { const { ref: root, playing: onStage, take } = useAutoplay(6000); const playing = autoplay && !defaultState && onStage; // A phase set by defaultState holds: the proposal doesn't sweep in from it. const held = defaultState?.phase !== undefined; const [phase, setPhase] = useState(defaultState?.phase ?? (reveal ? 'idle' : 'proposed')); const [accepted, setAccepted] = useState(() => defaultState?.ticked ? new Set(defaultState.ticked.filter((id) => changed(rows).has(id))) : changed(rows), ); const [applied, setApplied] = useState(() => defaultState?.phase === 'applied' ? accepted.size : 0, ); // Seen on screen at least once: the proposal waits for it. const [seen, setSeen] = useState(!reveal || held); const [pressing, setPressing] = useState(false); const [announce, setAnnounce] = useState(''); const reduced = useRef(false); useEffect(() => { reduced.current = window.matchMedia('(prefers-reduced-motion: reduce)').matches; const element = root.current; if (!element || seen) return; const observer = new IntersectionObserver( ([entry]) => { if (entry.isIntersecting) setSeen(true); }, { threshold: 0.3 }, ); observer.observe(element); return () => observer.disconnect(); }, [root, seen]); const removals = rows.filter((row) => row.change === 'remove' && accepted.has(row.id)); const additions = rows.filter((row) => row.change === 'add' && accepted.has(row.id)); const count = removals.length + additions.length; const summary = summaryLabel(removals.length, additions.length); // The proposal's arrival: the removals tint, then the boxes, the additions and the footer. useEffect(() => { if (!seen || held) return; if (phase === 'idle') { if (reduced.current) { setPhase('proposed'); return; } const timer = window.setTimeout(() => setPhase('marked'), MARK); return () => window.clearTimeout(timer); } if (phase === 'marked') { const timer = window.setTimeout(() => setPhase('proposed'), PROPOSE); return () => window.clearTimeout(timer); } }, [seen, held, phase]); // The demo: untick a row or two and tick them again, apply, then clear and propose again. useEffect(() => { if (!playing) return; const timers: number[] = []; const at = (ms: number, step: () => void) => timers.push(window.setTimeout(step, ms)); const all = changed(rows); const without = (...ids: string[]) => new Set([...all].filter((id) => !ids.includes(id))); const additionId = rows.find((row) => row.change === 'add')?.id ?? ''; const removalIds = rows.filter((row) => row.change === 'remove').map((row) => row.id); const secondId = removalIds[removalIds.length - 1] ?? ''; if (phase === 'proposed') { setAccepted(all); at(1600, () => setAccepted(without(additionId))); at(2500, () => setAccepted(without(additionId, secondId))); at(3600, () => setAccepted(without(additionId))); at(4300, () => setAccepted(all)); at(5300, () => setPressing(true)); at(5450, () => { setPressing(false); setApplied(all.size); setPhase('applied'); }); } else if (phase === 'applied') { at(2800, () => { setAccepted(all); setPhase('idle'); }); } return () => timers.forEach((timer) => window.clearTimeout(timer)); }, [playing, phase, rows]); const interactive = phase === 'proposed'; const toggle = (id: string) => { if (!interactive) return; const next = new Set(accepted); if (next.has(id)) next.delete(id); else next.add(id); setAccepted(next); onChange?.([...next]); const r = rows.filter((row) => row.change === 'remove' && next.has(row.id)).length; const a = rows.filter((row) => row.change === 'add' && next.has(row.id)).length; setAnnounce(summaryLabel(r, a)); }; const apply = () => { if (!interactive || count === 0) return; setApplied(count); setPhase('applied'); setAnnounce(appliedLabel(count)); onApply?.({ removed: removals, added: additions }); }; // A press anywhere on a changed row flips it, unless it landed on the checkbox itself. const onRowClick = (id: string) => (event: MouseEvent) => { if ((event.target as HTMLElement).tagName === 'INPUT') return; toggle(id); }; const widths = columns.map((column) => column.width).join(' '); const cell = (row: DiffRow, column: DiffColumn, last: boolean, state: string) => { const value = row.cells[column.key] ?? ''; if (column.kind === 'tag') return ( ); if (!last) return value; if (!row.change || phase === 'idle' || phase === 'marked') return ( {value} ); const on = accepted.has(row.id); const verb = row.change === 'remove' ? 'Remove' : 'Add'; const name = row.cells[columns[0].key] ?? row.id; return ( {value} toggle(row.id)} onKeyDown={(event) => { if (event.key === 'Enter') { event.preventDefault(); toggle(row.id); } }} /> ); }; const cells = (row: DiffRow, state: string, Tag: 'td' | 'span') => columns.map((column, index) => ( {cell(row, column, index === columns.length - 1, state)} )); const shown = phase === 'proposed' || phase === 'applied'; return (

{announce}

{title} {interactive && ( {hint} )}
{columns.map((column) => ( ))} {columns.map((column) => ( ))} {rows.map((row) => { if (row.change === 'add') { const state = accepted.has(row.id) ? 'add' : 'off'; return ( ); } const marked = row.change === 'remove' && (phase === 'marked' || (phase !== 'idle' && accepted.has(row.id))); const state = marked ? 'remove' : 'plain'; const live = row.change === 'remove' && interactive; return ( {cells(row, state, 'td')} ); })}
{column.label}
{cells(row, state, 'span')}
{shown && (
{phase === 'applied' ? ( {appliedLabel(applied)} ) : ( <> {summary} )}
)}
); } /** A tick on a 24-unit grid, drawn at 11 px. */ function Check() { return ( ); } ``` ### diff-table/diff-table.module.css ```css /* Diff table (diff-table.tsx): a soft grey stage with a 380 px card in its middle, or at night a graphite stage with the card a step lighter. Colours are the tokens below, light-dark(light, dark): the component takes the color-scheme it inherits from the page (light unless the page says otherwise), or the one its colorScheme prop sets (data-color-scheme). The card's shadow is one list for both schemes, each layer coloured for one of them and clear in the other. Motion is colour and opacity on the rows, and grid-template-rows on the rows being added, so nothing is measured. */ .root { /* The stage, the card, and the sunken pills and boxes. */ --canvas: oklch(96.1% 0.002 247.84); --surface: oklch(100% 0 0); --inset: oklch(97.9% 0.002 247.839); /* Words: strong, quiet, and quieter. */ --ink: oklch(24.7% 0.006 258.361); --ink-2: oklch(50.6% 0.01 264.477); --ink-3: oklch(69.5% 0.009 264.505); --line: oklch(94.6% 0.003 264.542); /* Apply, and Apply under the pointer; also the blue dots and the focus ring. */ --accent: oklch(62.6% 0.205 254.947); --accent-hover: oklch(55.6% 0.187 255.617); /* Removals and additions, and their row tints. */ --red: oklch(62.1% 0.192 23.042); --red-tint: oklch(95.6% 0.017 17.462); --green: oklch(60.3% 0.155 150.883); --green-tint: oklch(95.8% 0.017 159.118); /* The card's ring and lift: the day's long soft shadows, the night's short dark ones. */ --card-ring: oklch(94.6% 0.003 264.542); --day-3: rgb(0 0 0 / 0.031); --day-2: rgb(0 0 0 / 0.02); --day-1: rgb(0 0 0 / 0.012); --night: transparent; position: relative; container-type: inline-size; display: flex; align-items: center; justify-content: center; box-sizing: border-box; width: 100%; min-height: 331px; padding: 12px; overflow: hidden; overflow: clip; border-radius: 14px; background: var(--canvas); box-shadow: 0 0 0 1px var(--line); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, sans-serif; font-size: 14px; line-height: 1.5; letter-spacing: -0.14px; font-feature-settings: normal; -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent; } @supports (color: light-dark(#fff, #000)) { .root { --canvas: light-dark(oklch(96.1% 0.002 247.84), oklch(23.1% 0.004 264.487)); --surface: light-dark(oklch(100% 0 0), oklch(26% 0.006 271.191)); --inset: light-dark(oklch(97.9% 0.002 247.839), oklch(24.3% 0.004 264.492)); --ink: light-dark(oklch(24.7% 0.006 258.361), oklch(96.4% 0.002 247.839)); --ink-2: light-dark(oklch(50.6% 0.01 264.477), oklch(73.1% 0.008 260.731)); --ink-3: light-dark(oklch(69.5% 0.009 264.505), oklch(54.1% 0.01 264.484)); --line: light-dark(oklch(94.6% 0.003 264.542), oklch(30.8% 0.006 258.354)); --accent: light-dark(oklch(62.6% 0.205 254.947), oklch(68% 0.173 253.301)); --accent-hover: light-dark(oklch(55.6% 0.187 255.617), oklch(78.8% 0.113 248.33)); --red: light-dark(oklch(62.1% 0.192 23.042), oklch(66.6% 0.18 21.433)); --red-tint: light-dark(oklch(95.6% 0.017 17.462), oklch(66.6% 0.18 21.433 / 0.14)); --green: light-dark(oklch(60.3% 0.155 150.883), oklch(70.5% 0.154 153.814)); --green-tint: light-dark(oklch(95.8% 0.017 159.118), oklch(70.5% 0.154 153.814 / 0.14)); --card-ring: light-dark(oklch(94.6% 0.003 264.542), oklch(100% 0 0 / 0.11)); --day-3: light-dark(rgb(0 0 0 / 0.031), transparent); --day-2: light-dark(rgb(0 0 0 / 0.02), transparent); --day-1: light-dark(rgb(0 0 0 / 0.012), transparent); --night: light-dark(transparent, oklch(0% 0 0 / 0.2)); } } .root[data-color-scheme='light'] { color-scheme: light; } .root[data-color-scheme='dark'] { color-scheme: dark; } .root[data-color-scheme='system'] { color-scheme: light dark; } :where(.root) :where(button, input, table, th, td) { margin: 0; font: inherit; letter-spacing: inherit; } /* The card's column: 480 px at most, the card itself 380. */ .column { display: flex; justify-content: center; width: 100%; max-width: 480px; } .card { position: relative; width: 100%; max-width: 380px; overflow: hidden; border-radius: 10px; background: var(--surface); box-shadow: 0 0 0 1px var(--card-ring), 0 1px 2px var(--night), 0 2px 6px var(--night), 0 18px 47px var(--day-3), 0 7.5px 19px var(--day-2), 0 4px 10.5px var(--day-2), 0 2.3px 5.8px var(--day-1), 0 1.2px 3.1px var(--day-1), 0 0.5px 1.3px var(--day-1); } /* The title bar: the title, and the hint while the changes can be toggled. */ .bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; border-bottom: 1px solid var(--line); } .title { flex: none; font-size: 12.5px; font-weight: 500; line-height: 18.75px; } .hint { min-width: 0; overflow: hidden; color: var(--ink-3); font-size: 11px; line-height: 16.5px; white-space: nowrap; text-overflow: ellipsis; } .table { width: 100%; table-layout: fixed; border-collapse: collapse; border-spacing: 0; text-align: left; } .table thead tr { border-bottom: 1px solid var(--line); } th.cell { color: var(--ink-3); font-size: 12px; font-weight: 500; line-height: 18px; } /* Every cell: 12 px in from the sides, rows 44 px tall plus their line. */ .cell { box-sizing: border-box; min-width: 0; padding: 10px 12px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; vertical-align: middle; } td.cell { height: 45px; } .row[data-added] { min-height: 45px; } .cell[data-kind='name'] { font-size: 13px; font-weight: 500; line-height: 19.5px; font-variant-numeric: tabular-nums; } .cell[data-kind='text'] { color: var(--ink-2); font-size: 12.5px; line-height: 18.75px; text-decoration-color: color-mix(in srgb, var(--red) 50%, transparent); } .cell[data-kind='name'], .cell[data-kind='text'] { transition: color 200ms cubic-bezier(0.4, 0, 0.2, 1), text-decoration-color 200ms cubic-bezier(0.4, 0, 0.2, 1); } /* A row, and the states the proposal gives it. */ .row { border-bottom: 1px solid var(--line); transition: background-color 150ms cubic-bezier(0.4, 0, 0.2, 1), filter 150ms cubic-bezier(0.4, 0, 0.2, 1); } .table tbody > tr:last-child { border-bottom: 0; } .row[data-state='remove'] { background: var(--red-tint); } .row[data-state='remove'] > .cell[data-kind='name'], .row[data-state='remove'] > .cell[data-kind='text'] { color: var(--red); } .row[data-state='remove'] > .cell[data-last] { text-decoration-line: line-through; } .row[data-state='remove'] .tag { opacity: 0.55; } .row[data-interactive] { cursor: pointer; } @media (hover: hover) { .row[data-interactive]:hover { filter: brightness(0.985); } } .row:has(.input:focus-visible) { outline: 1px solid var(--accent); outline-offset: -1px; } /* A row being added: it opens by its grid row, so its height is never measured. */ .addedHost { border: 0; } .addedCell { padding: 0; } .collapse { display: grid; grid-template-rows: 0fr; opacity: 0; transition: grid-template-rows 200ms cubic-bezier(0.23, 1, 0.32, 1), opacity 200ms cubic-bezier(0.23, 1, 0.32, 1); } .collapse[data-open='true'] { grid-template-rows: 1fr; opacity: 1; } .clip { min-height: 0; overflow: hidden; } .row[data-added] { display: grid; box-sizing: border-box; grid-template-columns: var(--columns); align-items: center; border-top: 1px solid var(--line); border-bottom: 0; } .row[data-added] > .cell[data-kind='text'] { font-size: 13px; line-height: 19.5px; } .row[data-added] .tag { background: var(--surface); } .row[data-state='add'] { background: var(--green-tint); } .row[data-state='add'] > .cell[data-kind='name'], .row[data-state='add'] > .cell[data-kind='text'] { color: var(--green); } .row[data-state='off'] > .cell[data-kind='name'], .row[data-state='off'] > .cell[data-kind='text'] { color: var(--ink-3); } /* The tag: a small sunken pill with a coloured dot. */ .tag { display: inline-flex; box-sizing: border-box; max-width: 100%; height: 22px; align-items: center; gap: 6px; padding: 0 8px; border-radius: 999px; background: var(--inset); box-shadow: 0 0 0 1px var(--line); font-size: 11.5px; font-weight: 500; line-height: 17.25px; vertical-align: middle; transition: opacity 200ms cubic-bezier(0.4, 0, 0.2, 1); } .dot { flex: none; width: 6px; height: 6px; border-radius: 50%; background: var(--ink-3); } .tag[data-tone='blue'] .dot { background: var(--accent); } .tag[data-tone='green'] .dot { background: var(--green); } .tag[data-tone='red'] .dot { background: var(--red); } .tagLabel { min-width: 0; overflow: hidden; color: var(--ink-2); text-overflow: ellipsis; } /* The last cell: its value, and the change's box at the far end. */ .end { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 8px; } .truncate { min-width: 0; overflow: hidden; text-overflow: ellipsis; } .input { position: absolute; right: 0; width: 18px; height: 18px; margin: 0; opacity: 0; pointer-events: none; } .box { display: flex; flex: none; align-items: center; justify-content: center; width: 18px; height: 18px; border-radius: 5px; background: var(--inset); box-shadow: 0 0 0 1px var(--line); color: var(--ink-3); transform: scale(0.92); transition: background-color 150ms cubic-bezier(0.4, 0, 0.2, 1), color 150ms cubic-bezier(0.4, 0, 0.2, 1), transform 150ms cubic-bezier(0.4, 0, 0.2, 1); } .box[data-on='true'] { box-shadow: none; color: #fff; transform: none; } .box[data-on='true'][data-state='remove'] { background: var(--red); } .box[data-on='true'][data-state='add'] { background: var(--green); } .box svg, .appliedIcon svg { fill: none; stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; } /* The footer: the count and Apply, or the applied pill. It rises in as the proposal lands. */ .footer { display: flex; box-sizing: border-box; min-height: 44px; align-items: center; justify-content: space-between; gap: 8px; padding: 10px; border-top: 1px solid var(--line); animation: rise 180ms cubic-bezier(0.23, 1, 0.32, 1) both; } @keyframes rise { from { opacity: 0; transform: translateY(8px); } } .summary { min-width: 0; overflow: hidden; color: var(--ink-3); font-size: 11.5px; line-height: 17.25px; font-variant-numeric: tabular-nums; white-space: nowrap; text-overflow: ellipsis; } .apply { display: inline-flex; flex: none; height: 27px; align-items: center; justify-content: center; padding: 0 12px; border: 0; border-radius: 999px; background: var(--accent); box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.14); color: #fff; font-size: 12px; font-weight: 500; line-height: 18px; cursor: pointer; user-select: none; transition: transform 150ms cubic-bezier(0, 0, 0.2, 1), background-color 150ms cubic-bezier(0, 0, 0.2, 1), opacity 150ms cubic-bezier(0, 0, 0.2, 1); } @media (hover: hover) { .apply:hover { background: var(--accent-hover); } } .apply:active, .apply[data-pressing] { transform: scale(0.96); } .apply:disabled { opacity: 0.5; pointer-events: none; } .apply:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; } .applied { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px 4px 4px; border-radius: 999px; background: var(--green-tint); color: var(--green); font-size: 12.5px; font-weight: 500; line-height: 18.75px; animation: pop 180ms cubic-bezier(0.23, 1, 0.32, 1) both; } @keyframes pop { from { opacity: 0; transform: scale(0.95); } } .appliedIcon { display: flex; align-items: center; justify-content: center; width: 18px; height: 18px; border-radius: 50%; background: var(--green); color: #fff; } .hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; } /* On a narrow card the cells and the bar come in a little from the sides. */ @container (max-width: 360px) { .cell { padding-right: 8px; padding-left: 8px; } .bar { padding-right: 10px; padding-left: 10px; } .tag { gap: 5px; padding: 0 7px; } } @media (prefers-reduced-motion: reduce) { .row, .cell, .tag, .box, .collapse, .apply { transition: none; } .footer, .applied { animation: none; } } ``` ### diff-table/use-autoplay.ts ```tsx 'use client'; import { useCallback, useEffect, useRef, useState } from 'react'; /* * When a demo may play on its own: while part of it is on screen and the tab is visible, never * under reduced motion, and not while the reader is using it. `take()` hands it to the reader; it * takes back over `idle` ms after their last input. */ export function useAutoplay(idle = 6000) { const ref = useRef(null); const [visible, setVisible] = useState(false); const [reduced, setReduced] = useState(true); const [taken, setTaken] = useState(false); const timer = useRef(0); useEffect(() => { const element = ref.current; if (!element) return; let onScreen = false; const update = () => setVisible(onScreen && !document.hidden); const observer = new IntersectionObserver( ([entry]) => { onScreen = entry.isIntersecting; update(); }, { threshold: 0.3 }, ); observer.observe(element); document.addEventListener('visibilitychange', update); const motion = window.matchMedia('(prefers-reduced-motion: reduce)'); const readMotion = () => setReduced(motion.matches); readMotion(); motion.addEventListener('change', readMotion); return () => { observer.disconnect(); document.removeEventListener('visibilitychange', update); motion.removeEventListener('change', readMotion); }; }, []); const take = useCallback(() => { setTaken(true); window.clearTimeout(timer.current); timer.current = window.setTimeout(() => setTaken(false), idle); }, [idle]); useEffect(() => () => window.clearTimeout(timer.current), []); return { ref, take, playing: visible && !reduced && !taken }; } ```