Pagination

A frame that stretches to the page you picked and then catches up with itself, in three styles of button.

Take it with you

This demo also exists as a standalone project — npm install && npm run dev, no changes needed. 

npx giget@latest gh:lordicondev/ui-components/pagination#standalone pagination

Copies the pagination folder of the standalone branch — where every demo lives on its own — into ./pagination.

How it works

Define the element, put the icon in the markup, set the control's state. Then the parts that make this demo different.

Define the element Built-in triggers only. What each icon follows is written in its markup. 
import { defineElement } from '@lordicon/element';

// Registers <lord-icon> with its built-in triggers. The markup says what each icon follows.
defineElement();
The pages and the frame aria-current says which page it is. The frame is one element for the row.
html 
<!-- The frame is one element for the row, so it can travel between pages.
     aria-current is what says which page is current. -->
<div class="numbers">
    <span class="numbers__frame" aria-hidden="true"></span>

    <button class="page" type="button">1</button>
    <button class="page" type="button" aria-current="page">2</button>
    <button class="page" type="button">3</button>
    <button class="page" type="button">4</button>
</div>
Change page Move aria-current, place the frame, disable the step with nowhere to go. 
/** Wires one row: its pages, its two steps, and the frame. */
function paginate(row: HTMLElement): void {
    const numbers = row.querySelector<HTMLElement>('.numbers')!;
    const pages = [...row.querySelectorAll<HTMLButtonElement>('.page')];
    const steps = [...row.querySelectorAll<HTMLButtonElement>('.step')];
    let at = pages.findIndex((page) => page.getAttribute('aria-current') === 'page');

    function turn(to: number): void {
        if (to === at || to < 0 || to >= pages.length) return;

        pages[at].removeAttribute('aria-current');
        pages[to].setAttribute('aria-current', 'page');
        place(numbers, pages[to], to > at ? 'on' : 'back');
        at = to;
        limit(steps, at, pages.length);
    }

    pages.forEach((page, index) => page.addEventListener('click', () => turn(index)));
    steps.forEach((step) => {
        step.addEventListener('click', () => turn(at + Number(step.dataset.step)));
    });

    new ResizeObserver(() => place(numbers, pages[at], 'on')).observe(numbers);
    limit(steps, at, pages.length);
}
Place the frame Measured, so the row can have any number of pages at any width. 
/**
 * Puts the frame over `page`. Both edges are written every time; the stylesheet reads
 * `data-going` to decide which edge moves first. Also runs whenever the row changes size:
 * when it is first shown, and when the web font arrives. A hidden row has no size and keeps
 * its frame where it was, so the frame does not slide in when the row comes back.
 */
function place(numbers: HTMLElement, page: HTMLElement, going: 'on' | 'back'): void {
    if (!numbers.offsetWidth) return;
    const trailing = numbers.offsetWidth - page.offsetLeft - page.offsetWidth;

    numbers.dataset.going = going;
    numbers.style.setProperty('--frame-left', `${page.offsetLeft}px`);
    numbers.style.setProperty('--frame-right', `${trailing}px`);
}
The frame's two transitions The direction decides which edge leaves first.
css 
.numbers__frame {
    position: absolute;
    inset-block: 0;
    left: var(--frame-left);
    right: var(--frame-right);
    border: 1px solid var(--accent);
    border-radius: var(--radius-md);
    pointer-events: none;
    transition:
        right var(--frame-lead),
        left var(--frame-trail);
}

.numbers[data-going='back'] .numbers__frame {
    transition:
        left var(--frame-lead),
        right var(--frame-trail);
}
One arrow icon, flipped for next Flipping the button flips its animation with it.
html 
<!-- One arrow icon for both buttons. The stylesheet flips the next button's
     icon, and its animation with it. -->
<button
    class="step step--boxed"
    type="button"
    data-step="-1"
    aria-label="Previous page"
>
    <lord-icon
        class="step__mark"
        current-color
        src="icons/arrow-left.json"
        loading="interaction"
        trigger="click"
        target=".step"
        state="hover-slide"
        aria-hidden="true"
    >
        <img alt="" src="icons/arrow-left.svg" />
    </lord-icon>
</button>
The three button styles A box, a box with a word, and no box at all. Everything else is shared.
css 
.step--boxed {
    border: 1px solid var(--border);
    background: var(--surface);
}

.step--boxed:hover:not(:disabled),
.step--labelled:hover:not(:disabled) {
    background: var(--surface-muted);
}

.step--boxed:active:not(:disabled),
.step--labelled:active:not(:disabled) {
    background: var(--surface-sunken);
}

/* No box to tint, so the chevron changes colour instead. */
.step--bare:hover:not(:disabled) {
    color: var(--accent);
}

.step--labelled .step__mark,
.step--bare .step__mark {
    width: var(--icon-size-20);
    height: var(--icon-size-20);
}

Every file

The demo's own files, whole, at the paths the export uses.

index.html 170 lines
html 
<!doctype html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <title>Pagination</title>
        <link rel="stylesheet" href="./pagination.css" />
        <script type="module" src="./main.ts"></script>
    </head>
    <body>
        <main class="demo">
            <nav class="pages" id="style-arrows" data-page aria-label="Pagination">
                <!-- One arrow icon for both buttons. The stylesheet flips the next button's
                     icon, and its animation with it. -->
                <button
                    class="step step--boxed"
                    type="button"
                    data-step="-1"
                    aria-label="Previous page"
                >
                    <lord-icon
                        class="step__mark"
                        current-color
                        src="icons/arrow-left.json"
                        loading="interaction"
                        trigger="click"
                        target=".step"
                        state="hover-slide"
                        aria-hidden="true"
                    >
                        <img alt="" src="icons/arrow-left.svg" />
                    </lord-icon>
                </button>

                <!-- The frame is one element for the row, so it can travel between pages.
                     aria-current is what says which page is current. -->
                <div class="numbers">
                    <span class="numbers__frame" aria-hidden="true"></span>

                    <button class="page" type="button">1</button>
                    <button class="page" type="button" aria-current="page">2</button>
                    <button class="page" type="button">3</button>
                    <button class="page" type="button">4</button>
                </div>

                <button
                    class="step step--boxed step--next"
                    type="button"
                    data-step="1"
                    aria-label="Next page"
                >
                    <lord-icon
                        class="step__mark"
                        current-color
                        src="icons/arrow-left.json"
                        loading="interaction"
                        trigger="click"
                        target=".step"
                        state="hover-slide"
                        aria-hidden="true"
                    >
                        <img alt="" src="icons/arrow-left.svg" />
                    </lord-icon>
                </button>
            </nav>

            <nav class="pages" id="style-labelled" data-page hidden aria-label="Pagination">
                <button class="step step--labelled" type="button" data-step="-1">
                    <lord-icon
                        class="step__mark"
                        current-color
                        src="icons/chevron-left.json"
                        trigger="click"
                        target=".step"
                        aria-hidden="true"
                    ></lord-icon>
                    Previous
                </button>

                <div class="numbers">
                    <span class="numbers__frame" aria-hidden="true"></span>

                    <button class="page" type="button">1</button>
                    <button class="page" type="button" aria-current="page">2</button>
                    <button class="page" type="button">3</button>
                    <button class="page" type="button">4</button>
                </div>

                <button class="step step--labelled step--next" type="button" data-step="1">
                    Next
                    <lord-icon
                        class="step__mark"
                        current-color
                        src="icons/chevron-left.json"
                        trigger="click"
                        target=".step"
                        aria-hidden="true"
                    ></lord-icon>
                </button>
            </nav>

            <nav class="pages pages--bare" id="style-bare" data-page hidden aria-label="Pagination">
                <button
                    class="step step--bare"
                    type="button"
                    data-step="-1"
                    aria-label="Previous page"
                >
                    <lord-icon
                        class="step__mark"
                        current-color
                        src="icons/chevron-left.json"
                        trigger="click"
                        target=".step"
                        aria-hidden="true"
                    ></lord-icon>
                </button>

                <div class="numbers">
                    <span class="numbers__frame" aria-hidden="true"></span>

                    <button class="page" type="button">1</button>
                    <button class="page" type="button" aria-current="page">2</button>
                    <button class="page" type="button">3</button>
                    <button class="page" type="button">4</button>
                </div>

                <button
                    class="step step--bare step--next"
                    type="button"
                    data-step="1"
                    aria-label="Next page"
                >
                    <lord-icon
                        class="step__mark"
                        current-color
                        src="icons/chevron-left.json"
                        trigger="click"
                        target=".step"
                        aria-hidden="true"
                    ></lord-icon>
                </button>
            </nav>

            <div class="pager">
                <button
                    class="pager__dot"
                    type="button"
                    aria-pressed="true"
                    aria-controls="style-arrows"
                    aria-label="Arrow buttons"
                ></button>
                <button
                    class="pager__dot"
                    type="button"
                    aria-pressed="false"
                    aria-controls="style-labelled"
                    aria-label="Chevrons with labels"
                ></button>
                <button
                    class="pager__dot"
                    type="button"
                    aria-pressed="false"
                    aria-controls="style-bare"
                    aria-label="Chevrons alone"
                ></button>
            </div>
        </main>
    </body>
</html>
main.ts 59 lines 
import { defineElement } from '@lordicon/element';

// Registers <lord-icon> with its built-in triggers. The markup says what each icon follows.
defineElement();

import { pager } from '@shared/ui/pager.ts';

/**
 * Puts the frame over `page`. Both edges are written every time; the stylesheet reads
 * `data-going` to decide which edge moves first. Also runs whenever the row changes size:
 * when it is first shown, and when the web font arrives. A hidden row has no size and keeps
 * its frame where it was, so the frame does not slide in when the row comes back.
 */
function place(numbers: HTMLElement, page: HTMLElement, going: 'on' | 'back'): void {
    if (!numbers.offsetWidth) return;
    const trailing = numbers.offsetWidth - page.offsetLeft - page.offsetWidth;

    numbers.dataset.going = going;
    numbers.style.setProperty('--frame-left', `${page.offsetLeft}px`);
    numbers.style.setProperty('--frame-right', `${trailing}px`);
}

/** Disables a step with nowhere to go. A disabled button fires no click, so its icon holds still. */
function limit(steps: HTMLButtonElement[], at: number, count: number): void {
    for (const step of steps) {
        const next = at + Number(step.dataset.step);
        step.disabled = next < 0 || next >= count;
    }
}

/** Wires one row: its pages, its two steps, and the frame. */
function paginate(row: HTMLElement): void {
    const numbers = row.querySelector<HTMLElement>('.numbers')!;
    const pages = [...row.querySelectorAll<HTMLButtonElement>('.page')];
    const steps = [...row.querySelectorAll<HTMLButtonElement>('.step')];
    let at = pages.findIndex((page) => page.getAttribute('aria-current') === 'page');

    function turn(to: number): void {
        if (to === at || to < 0 || to >= pages.length) return;

        pages[at].removeAttribute('aria-current');
        pages[to].setAttribute('aria-current', 'page');
        place(numbers, pages[to], to > at ? 'on' : 'back');
        at = to;
        limit(steps, at, pages.length);
    }

    pages.forEach((page, index) => page.addEventListener('click', () => turn(index)));
    steps.forEach((step) => {
        step.addEventListener('click', () => turn(at + Number(step.dataset.step)));
    });

    new ResizeObserver(() => place(numbers, pages[at], 'on')).observe(numbers);
    limit(steps, at, pages.length);
}

for (const row of document.querySelectorAll<HTMLElement>('.pages')) paginate(row);

pager();
pagination.css 147 lines
css 
@import '@shared/styles/index.css';
@import '@shared/ui/pager.css';

/* A row above, the dots below. */
.demo {
    display: grid;
    grid-template-rows: 1fr auto;
    justify-items: center;
    align-items: center;
    gap: var(--space-48);
    min-height: 100dvh;
    padding: var(--space-64) var(--gutter) var(--space-32);
}

.pages {
    display: flex;
    align-items: center;
    gap: var(--space-96);
}

/* The bare chevrons carry 8px of padding to be big enough to hit; the gap gives it back
   so the visible distance matches the other rows. */
.pages--bare {
    gap: calc(var(--space-96) - var(--space-8));
}

.numbers {
    position: relative;
    display: flex;
    gap: var(--space-4);
}

/*
 * The frame's two edges do not move together. The leading edge goes first, so the frame
 * stretches to the new page; the trailing edge follows once it has arrived. Times and
 * curves are from the reference recording.
 */
.numbers {
    --frame-lead: 130ms cubic-bezier(0.4, 0, 1, 1);
    --frame-trail: 300ms cubic-bezier(0.215, 0.61, 0.355, 1) 130ms;
}

.numbers__frame {
    position: absolute;
    inset-block: 0;
    left: var(--frame-left);
    right: var(--frame-right);
    border: 1px solid var(--accent);
    border-radius: var(--radius-md);
    pointer-events: none;
    transition:
        right var(--frame-lead),
        left var(--frame-trail);
}

.numbers[data-going='back'] .numbers__frame {
    transition:
        left var(--frame-lead),
        right var(--frame-trail);
}

/* Hidden until the row has been measured, which is when `data-going` is first set. */
.numbers:not([data-going]) .numbers__frame {
    opacity: 0;
}

/* A square: as wide as a line of text plus padding is tall. A minimum, so a two-digit
   page can widen it. */
.page {
    display: grid;
    place-items: center;
    min-width: calc(var(--leading-base) + 2 * var(--space-8));
    padding: var(--space-8);
    border: 0;
    border-radius: var(--radius-md);
    background: none;
    font-weight: 500;
    cursor: pointer;
}

.page:hover {
    background: var(--surface-muted);
}

.step {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8);
    border: 0;
    border-radius: var(--radius-md);
    background: none;
    color: var(--ink);
    font-weight: 500;
    --icon-filter: var(--filter-ink);
    cursor: pointer;
}

.step:disabled {
    color: var(--ink-subtle);
    --icon-filter: var(--filter-ink-subtle);
    cursor: default;
}

/* One arrow icon for both buttons. Flipping the next one flips its animation too. */
.step__mark {
    flex: none;
    width: var(--icon-size-24);
    height: var(--icon-size-24);
}

.step--next .step__mark {
    scale: -1 1;
}

/* Everything that differs between the three rows. */
.step--boxed {
    border: 1px solid var(--border);
    background: var(--surface);
}

.step--boxed:hover:not(:disabled),
.step--labelled:hover:not(:disabled) {
    background: var(--surface-muted);
}

.step--boxed:active:not(:disabled),
.step--labelled:active:not(:disabled) {
    background: var(--surface-sunken);
}

/* No box to tint, so the chevron changes colour instead. */
.step--bare:hover:not(:disabled) {
    color: var(--accent);
}

.step--labelled .step__mark,
.step--bare .step__mark {
    width: var(--icon-size-20);
    height: var(--icon-size-20);
}

@media (prefers-reduced-motion: reduce) {
    .numbers__frame {
        transition: none;
    }
}
What it imports 6 shared files
shared/styles/base.css 115 lines
css 
/*
 * Fonts, reset and default typography. Nothing control-specific: every demo styles its
 * own control. Only the UI face is here; the mono face is the portal's.
 */
@font-face {
    font-family: 'Figtree';
    font-style: normal;
    font-weight: 300 900;
    font-display: swap;
    src: url('../fonts/figtree-latin.woff2') format('woff2');
    unicode-range:
        U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308,
        U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
    font-family: 'Figtree';
    font-style: normal;
    font-weight: 300 900;
    font-display: swap;
    src: url('../fonts/figtree-latin-ext.woff2') format('woff2');
    unicode-range:
        U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
        U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113,
        U+2C60-2C7F, U+A720-A7FF;
}

/* Arial with Figtree's measurements, for the moment before Figtree arrives, so the text does
   not move when it does. Measured on Figtree at 400 and 500. */
@font-face {
    font-family: 'Figtree fallback';
    src: local('Arial'), local('Liberation Sans');
    size-adjust: 100.3%;
    ascent-override: 94.7%;
    descent-override: 24.9%;
    line-gap-override: 0%;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

/* An author `display` on a component would beat the UA rule for [hidden], and then
   `el.hidden = true` would stop working. Settled once here. */
[hidden] {
    display: none !important;
}

body {
    margin: 0;
    background: var(--surface);
    color: var(--ink);
    --icon-filter: var(--filter-ink);
    font-family: var(--font-ui);
    font-size: var(--text-base);
    line-height: var(--leading-base);
    -webkit-font-smoothing: antialiased;
}

button,
input,
textarea,
select {
    font: inherit;
    color: inherit;
}

/* A second click on a button would otherwise select its label. */
button {
    -webkit-user-select: none;
    user-select: none;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/*
 * In the accessibility tree but not on screen: labels and legends that the visual design
 * has no room for. Clipped rather than `display: none`, which would remove it from the
 * tree too, and it also hides live radio inputs that must stay reachable by keyboard.
 */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

/*
 * Until the script defines <lord-icon> it is an unknown inline element with no size. These
 * rules give it the box it will have, so nothing moves when it is defined.
 */
lord-icon {
    display: inline-block;
    width: var(--icon-size-32);
    height: var(--icon-size-32);
}

/* A placeholder inside the icon fills it until the icon is ready. */
lord-icon:not(:defined) > img {
    display: block;
    width: 100%;
    height: 100%;
}

/* Placeholders are black. Set --icon-filter wherever an icon's colour is set. */
lord-icon > img {
    filter: var(--icon-filter);
}
shared/styles/index.css 4 lines
css 
/* The one stylesheet a demo imports. */
@import './palette.css';
@import './tokens.css';
@import './base.css';
shared/styles/palette.css 87 lines
css 
/*
 * Generated from the Figma token export.
 * Raw values only — roles live in tokens.css. Edit the Figma variables, not this file.
 */
:root {
    /* color/ink */
    --gray-0: #FFFFFF;
    --gray-50: #F7F8FA;
    --gray-100: #EEF0F3;
    --gray-200: #DEE1E6;
    --gray-300: #C3C7D0;
    --gray-400: #9BA1AD;
    --gray-500: #767C89;
    --gray-600: #565C68;
    --gray-700: #3D414B;
    --gray-800: #282B33;
    --gray-900: #16181D;
    --gray-950: #0A0B0E;

    /* color/signal */
    --brand-100: #FFEEE9;
    --brand-200: #FFD7CA;
    --brand-300: #FFB199;
    --brand-400: #FF7D5C;
    --brand-500: #FF5A36;
    --brand-600: #E8431F;
    --brand-700: #C2340F;

    /* color/success */
    --green-100: #EDF9F1;
    --green-300: #A7D9BC;
    --green-700: #15803D;

    /* color/error */
    --red-100: #FDECEC;
    --red-300: #F5B5B5;
    --red-700: #DC2626;

    /* typography/font */
    --font-ui-name: 'Figtree';
    --font-mono-name: 'JetBrains Mono';

    /* typography/size */
    --text-xs: 12px;
    --text-sm: 14px;
    --text-base: 16px;
    --text-lg: 20px;
    --text-xl: 24px;
    --text-2xl: 32px;
    --text-3xl: 40px;

    /* typography/lineHeight */
    --leading-xs: 16px;
    --leading-sm: 20px;
    --leading-base: 24px;
    --leading-lg: 28px;
    --leading-xl: 32px;
    --leading-2xl: 40px;
    --leading-3xl: 48px;

    /* spacing (named after the value, the Figma scale is non-linear) */
    --space-4: 4px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-24: 24px;
    --space-32: 32px;
    --space-48: 48px;
    --space-64: 64px;
    --space-96: 96px;

    /* size/icon */
    --icon-size-16: 16px;
    --icon-size-20: 20px;
    --icon-size-24: 24px;
    --icon-size-32: 32px;
    --icon-size-40: 40px;
    --icon-size-48: 48px;
    --icon-size-64: 64px;
    --icon-size-96: 96px;

    /* radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-pill: 9999px;
}
shared/styles/tokens.css 93 lines
css 
/*
 * Design tokens by role. Raw values come from palette.css (generated); which grey is a
 * border and which is muted text is decided here, and so would a dark mode be.
 */
:root {
    /* Text. `--ink*` is always a colour; `--text-*` is always a size. */
    --ink: var(--gray-950);
    /* Text that reads as done or in progress, a step lighter than a heading. */
    --ink-strong: var(--gray-800);
    /* Body copy: a step down from --ink. */
    --ink-soft: var(--gray-600);
    --ink-muted: var(--gray-500);
    --ink-subtle: var(--gray-400);
    /* What has not started yet. */
    --ink-faint: var(--gray-300);
    --ink-inverse: var(--gray-0);

    /* Backgrounds */
    --surface: var(--gray-0);
    --surface-muted: var(--gray-50);
    /* A well inside a surface: the filled shape a single icon sits in. */
    --surface-sunken: var(--gray-100);

    /* Outlines */
    --border: var(--gray-200);
    /* The edge of a box that already has a fill, such as an input. */
    --border-soft: var(--gray-100);
    --border-strong: var(--gray-300);
    --border-accent: var(--brand-400);

    /* Brand accent */
    --accent: var(--brand-500);
    --accent-strong: var(--brand-600);
    --accent-surface: var(--brand-100);
    /* The outline of a tinted box, or a small shape on one. */
    --accent-border: var(--brand-300);
    /* Text or a mark on either of the above. */
    --accent-ink: var(--brand-700);

    /* Status. Warning rides the brand ramp — that is what the designs use. */
    --success: var(--green-700);
    --success-surface: var(--green-100);
    --success-border: var(--green-300);

    --warning: var(--brand-500);
    --warning-surface: var(--brand-100);
    --warning-border: var(--brand-300);

    --danger: var(--red-700);
    --danger-surface: var(--red-100);
    --danger-border: var(--red-300);

    /* Icons. Fed straight into --lord-icon-* by the demos. */
    --icon-color: var(--gray-950);
    --icon-accent: var(--brand-500);

    /* Icon placeholders are black SVGs. Each filter turns black into the colour of the same
       name. Made with a CSS filter generator: make a new one when its colour changes. */
    --filter-ink: invert(2%) sepia(4%) saturate(4817%) hue-rotate(193deg) brightness(114%)
        contrast(96%);
    --filter-ink-soft: invert(33%) sepia(18%) saturate(323%) hue-rotate(182deg) brightness(100%)
        contrast(90%);
    --filter-ink-muted: invert(55%) sepia(23%) saturate(191%) hue-rotate(181deg) brightness(84%)
        contrast(89%);
    --filter-ink-subtle: invert(70%) sepia(11%) saturate(284%) hue-rotate(181deg) brightness(91%)
        contrast(86%);
    --filter-ink-faint: invert(76%) sepia(17%) saturate(99%) hue-rotate(184deg) brightness(99%)
        contrast(100%);
    --filter-ink-inverse: invert(100%);
    --filter-accent: invert(49%) sepia(65%) saturate(3508%) hue-rotate(337deg) brightness(106%)
        contrast(113%);
    --filter-accent-strong: invert(29%) sepia(85%) saturate(1790%) hue-rotate(350deg)
        brightness(94%) contrast(93%);
    --filter-success: invert(38%) sepia(22%) saturate(2045%) hue-rotate(94deg) brightness(92%)
        contrast(84%);
    --filter-warning: var(--filter-accent);
    --filter-danger: invert(48%) sepia(74%) saturate(7139%) hue-rotate(343deg) brightness(84%)
        contrast(105%);

    /* Type stacks. The families themselves are in palette.css. */
    --font-ui:
        var(--font-ui-name), 'Figtree fallback', -apple-system, BlinkMacSystemFont, 'Segoe UI',
        Roboto, sans-serif;
    --font-mono: var(--font-mono-name), ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Side padding of a page. The portal uses the same value, so demo and text line up. */
    --gutter: clamp(var(--space-16), 5vw, var(--space-48));

    /* A card's halo: no offset, so it reads as lift rather than as a light source. */
    --shadow-sm: 0 0 7.5px color-mix(in srgb, var(--gray-400) 20%, transparent);
    /* The same halo under a brand-coloured element. */
    --shadow-accent: 0 0 7.5px color-mix(in srgb, var(--accent-strong) 40%, transparent);
}
shared/ui/pager.css 40 lines
css 
/* The dots that page between the parts of a demo. Where they sit is the demo's business. */
.pager {
    display: flex;
    gap: var(--space-4);
}

/* A small dot inside a button big enough to hit. */
.pager__dot {
    display: grid;
    place-items: center;
    width: var(--space-24);
    height: var(--space-24);
    padding: 0;
    border: 0;
    background: none;
    cursor: pointer;
}

.pager__dot::before {
    content: '';
    width: var(--space-8);
    height: var(--space-8);
    border-radius: var(--radius-pill);
    background: var(--border-strong);
    transition: background 150ms ease;
}

.pager__dot:hover::before {
    background: var(--ink-subtle);
}

.pager__dot[aria-pressed='true']::before {
    background: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
    .pager__dot::before {
        transition: none;
    }
}
shared/ui/pager.ts 21 lines 
/**
 * Dots that switch between the parts of one demo. Demo scaffolding, not a control: it
 * exists so a demo can show three variants of a component without stacking them.
 *
 * Parts carry `data-page`, dots carry `.pager__dot`, both in source order. A hidden page is
 * out of the tab order and the accessibility tree.
 */
export function pager(root: ParentNode = document): (shown: number) => void {
    const pages = [...root.querySelectorAll<HTMLElement>('[data-page]')];
    const dots = [...root.querySelectorAll<HTMLButtonElement>('.pager__dot')];

    const show = (shown: number) => {
        pages.forEach((page, at) => (page.hidden = at !== shown));
        dots.forEach((dot, at) => dot.setAttribute('aria-pressed', String(at === shown)));
    };

    dots.forEach((dot, at) => dot.addEventListener('click', () => show(at)));
    show(0);

    return show;
}

Icons

Hover a preview to play it. The icons are under the Lordicon License Terms, not the MIT licence of the code.

Used as Lordicon icon
arrow-left system-outline-2753-arrow-left (edited by hand)
chevron-left system-outline-32-chevron-left (edited by hand)