GlassKit UI
Components

Button

A D-pad-focusable action. Renders a real <button> with the focusable class, so useDpad walks it and activates it on Enter/Space. Edge + focus ring are emitted light, never fills.

Heart rate128BPM

Enter activates

600 × 600 · live

Installation

npx @glasskit-ui/cli add button

Install the SDK (it provides GlassViewport, useDpad and the stylesheet), then copy these files into your project:

npm install @glasskit-ui/react
// components/lib/utils.tsexport type ClassValue = string | number | null | undefined | false;/** * Join truthy class names. Dependency-free on purpose: the lens components * style via bespoke semantic classes (no conflicting Tailwind utilities to * de-dupe), so this needs no clsx/tailwind-merge and resolves from anywhere * the registry is vendored. */export function cn(...inputs: ClassValue[]): string {  return inputs.filter(Boolean).join(" ");}/** * Accessible name from a free-form `label` prop: the label itself when it's a * plain string, otherwise undefined (a ReactNode can't become an aria-label). */export function stringLabel(label: unknown): string | undefined {  return typeof label === "string" ? label : undefined;}
// components/glasskit/button.tsximport type { ReactNode } from "react";import { cn } from "../lib/utils";/** * <Button> — a D-pad-focusable action. Renders a real <button> carrying * the `focusable` class, so `useDpad()` includes it in spatial navigation * and activates it on Enter/Space (the hook calls `.click()`, which fires * `onClick`). Edge + focus ring come from the additive `.focusable` recipe; * `primary` brightens the edge — no fills (apple-feel §9). */export function Button({  children,  variant = "secondary",  icon,  disabled,  onClick,  type = "button",  initialFocus = false,  className,}: {  children: ReactNode;  variant?: "primary" | "secondary";  /** Optional leading glyph — typically a <GlowIcon>. */  icon?: ReactNode;  disabled?: boolean;  onClick?: () => void;  type?: "button" | "submit" | "reset";  /** Seed the D-pad ring here when the screen mounts (`data-autofocus`). */  initialFocus?: boolean;  className?: string;}) {  return (    <button      type={type}      disabled={disabled}      onClick={onClick}      data-autofocus={initialFocus || undefined}      className={cn(        "focusable gk-btn t-body",        variant === "primary" && "gk-btn--primary",        className,      )}    >      {icon}      {children}    </button>  );}

Usage

<Button variant="primary" onClick={log}>  Confirm</Button>

Props

Prop

Type