Button

// Copyright (c) 2026 Bruno Delorence. MIT License.'use client';import {  createElement,  isValidElement,  type AnchorHTMLAttributes,  type ButtonHTMLAttributes,  type ComponentType,  type MouseEvent,  type ReactNode,  type Ref,} from 'react';import styles from './button.module.css';/* * Button: the everyday action. A <button> by default, an <a> when it has an href; four sizes, * five hierarchies (each with a destructive version), icons before or after the words or alone, * a loading spinner, a disabled state and an optional keyboard-shortcut chip. * * - Every look is a handful of private custom properties on the root (--_bg, --_fg, --_edge, *   --_ring, --_bevel, --_highlight, --_shadow, --_chip-bg, --_focus…) that the hierarchy sets and *   the states (hover, pressed, focus) change. The paint reads only those, so a hierarchy is a

/* Button (button.tsx). The palette is light-dark(light, dark) tokens on the root, so a button   follows the page's color-scheme. A hierarchy sets the private properties below (--_bg, --_fg,   --_edge…); the states change them; the paint reads only them. The anatomy figure overrides   them inline to draw one layer at a time, so every rule here must paint through them.   Measured: 36 / 40 / 44 / 48 px tall; 12 / 14 / 16 / 18 px of side padding; 4 px between parts   (6 px at lg and xl); 14/20 or 16/24 type at 600; 20 px icons; 8 px corners; 2 px of padding   around the words; focus ring 2 px, 2 px out; disabled at half opacity; 100 ms colour fades. */.button {  /* The palette. */  --color-white: #fff;  --color-accent-200: #c9cafa;  --color-accent-300: #a8a9f6;  --color-accent-400: #8789ef;  --color-accent-500: #6a6ce5;  --color-accent-600: #5557d9;  --color-accent-700: #4547bd;  --color-accent-800: #393a98;  --color-accent-950: #1d1e4a;  --color-error-50: #fef3f2;  --color-error-300: #fca19b;  --color-error-400: #f8726a;  --color-error-500: #ef4a3f;

// Copyright (c) 2026 Bruno Delorence. MIT License.import type { SVGProps } from 'react';/* * A few line icons for the examples and the figure, drawn on a 20-unit grid with a 1.67 stroke, * round ends and joins, in currentColor, so a button tints them like its words. They carry no * size: the button sizes its icons in CSS. */type IconProps = SVGProps<SVGSVGElement>;function Icon({ children, ...props }: IconProps) {  return (    <svg      viewBox="0 0 20 20"      fill="none"      stroke="currentColor"      strokeWidth={1.67}      strokeLinecap="round"      strokeLinejoin="round"      aria-hidden="true"      focusable="false"      {...props}

// Copyright (c) 2026 Bruno Delorence. MIT License.'use client';import { useEffect, useRef, useState, type KeyboardEvent } from 'react';import { Button } from './button';import { ArrowRightIcon, ArrowUpIcon, CopyIcon, DownloadIcon, TrashIcon } from './icons';import { useAutoplay } from './use-autoplay';import styles from './showcase.module.css';/* * Button showcase: the button at work. A primary "Deploy ⌘D" that really deploys (a loading * spinner beside its words, then a line saying it is done), and under it a row of the other * hierarchies: secondary, tertiary, a link, an icon-only square and a destructive one. * * - Every button is the real Button. Pressing Deploy, or ⌘D / Ctrl+D while the showcase has *   focus, runs the deploy: isLoading with showTextWhileLoading for 1.6 s, then "Deployed" for *   a moment. The other buttons say what they would do in the same status line. * - While on screen and untouched, it plays a slow walk-through: it points at each button in *   turn (data-state="hover"), presses it (data-state="pressed"), and ends on a deploy. The *   states are the button's own, forced through data-state, so nothing here paints a button. *   Any real input hands it to the reader, and it takes back over after six idle seconds. * - The status line is a polite live region for the reader's own presses and silent during the *   walk-through. Nothing plays under reduced motion or while the showcase is off screen.

/* Button showcase (showcase.tsx): a quiet stage with the Deploy button in its middle, a status   line under it and a row of the other hierarchies below. The buttons paint themselves   (button.module.css); this file only lays them out.   Colours are light-dark(light, dark) tokens: the stage 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). */.root {  --surface: #fff;  --line: rgb(0 0 0 / 0.06);  --dots: rgb(0 0 0 / 0.07);  --muted: #74747d;  position: relative;  width: 100%;  min-height: 360px;  display: grid;  place-items: center;  overflow: hidden;  overflow: clip;  border-radius: 18px;  background:    radial-gradient(circle at 1px 1px, var(--dots) 1px, transparent 1.5px) 0 0 / 16px 16px,    var(--surface);

'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<T extends HTMLElement>(idle = 6000) {  const ref = useRef<T>(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;