Tabs

npm install react-aria-components

"use client";

import type { ReactNode } from "react";
import {
  SelectionIndicator,
  Tab as AriaTab,
  TabList as AriaTabList,
  TabPanel as AriaTabPanel,
  Tabs as AriaTabs,
  type TabListProps as AriaTabListProps,
  type TabPanelProps as AriaTabPanelProps,
  type TabProps as AriaTabProps,
  type TabsProps as AriaTabsProps,
} from "react-aria-components";

const join = (...classes: (string | undefined)[]) => classes.filter(Boolean).join(" ");

const styles = {
  root: "flex flex-col gap-(--tui-tabs-panel-gap) font-(family-name:--tui-font) text-(length:--tui-tabs-font-size) text-(--tui-fg)",
  // One capsule with every tab in it. The chosen one is a pill that slides to wherever it is picked.
  list: "inline-flex w-fit gap-(--tui-tabs-gap) rounded-(--tui-tabs-list-radius) bg-(--tui-tabs-list-bg) p-(--tui-tabs-list-padding)",
  tab: "relative z-0 flex h-(--tui-tabs-height) cursor-default items-center justify-center rounded-(--tui-tabs-radius) px-(--tui-tabs-padding-x) leading-none font-(--tui-tabs-font-weight) whitespace-nowrap text-(--tui-tabs-fg) outline-none transition-colors duration-(--tui-tabs-duration) data-disabled:opacity-(--tui-tabs-disabled-opacity) data-focus-visible:[outline:var(--tui-tabs-ring-width)_solid_var(--tui-tabs-ring)] data-focus-visible:[outline-offset:var(--tui-tabs-ring-offset)] data-hovered:text-(--tui-tabs-fg-hover) data-selected:text-(--tui-tabs-selected-fg)!",
  indicator:
    "absolute inset-0 -z-10 rounded-(--tui-tabs-radius) bg-(--tui-tabs-selected-bg) shadow-(--tui-tabs-selected-shadow) transition-[translate,width,height] duration-(--tui-tabs-duration) ease-out motion-reduce:transition-none",
  panel: "leading-normal outline-none data-focus-visible:[outline:var(--tui-tabs-ring-width)_solid_var(--tui-tabs-ring)] data-focus-visible:[outline-offset:var(--tui-tabs-ring-offset)]",
};

type WithClass<T> = Omit<T, "className"> & { className?: string };

export function Tabs({ className, ...props }: WithClass<AriaTabsProps>) {
  return <AriaTabs {...props} className={join(styles.root, className)} />;
}

export function TabList<T extends object>({ className, ...props }: WithClass<AriaTabListProps<T>>) {
  return <AriaTabList data-slot="tabs-list" {...props} className={join(styles.list, className)} />;
}

export function Tab({ className, children, ...props }: Omit<WithClass<AriaTabProps>, "children"> & { children?: ReactNode }) {
  return (
    <AriaTab data-slot="tab" {...props} className={join(styles.tab, className)}>
      <SelectionIndicator data-slot="tab-indicator" className={styles.indicator} />
      {children}
    </AriaTab>
  );
}

export function TabPanel({ className, ...props }: WithClass<AriaTabPanelProps>) {
  return <AriaTabPanel {...props} className={join(styles.panel, className)} />;
}

:root {
  color-scheme: light;
  --tui-bg: #ffffff;
  --tui-fg: #0a0a0a;
  --tui-muted: #f5f5f5;
  --tui-muted-fg: #737373;
  --tui-border: #e5e5e5;
  --tui-primary: #171717;
  --tui-primary-fg: #fafafa;
  --tui-ring: #a3a3a3;
  --tui-success: #16a34a;
  --tui-warning: #d97706;
  --tui-danger: #dc2626;
  --tui-radius: 8px;
  --tui-border-width: 1px;
  --tui-space: 4px;
  --tui-shadow: none;
  --tui-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --tui-text: 14px;
  --tui-duration: 150ms;

  /* Tabs */
  --tui-tabs-height: calc(var(--tui-space) * 9);
  --tui-tabs-padding-x: calc(var(--tui-space) * 4.5);
  --tui-tabs-gap: calc(var(--tui-space) * 0.5);
  --tui-tabs-list-padding: calc(var(--tui-space) * 1);
  --tui-tabs-panel-gap: calc(var(--tui-space) * 5);
  --tui-tabs-list-radius: calc(var(--tui-radius) * 3);
  --tui-tabs-radius: calc(var(--tui-radius) * 2.5);
  --tui-tabs-font-size: var(--tui-text);
  --tui-tabs-font-weight: 500;
  --tui-tabs-duration: 200ms;
  --tui-tabs-list-bg: color-mix(in srgb, var(--tui-bg) 94%, var(--tui-fg));
  --tui-tabs-fg: var(--tui-muted-fg);
  --tui-tabs-fg-hover: var(--tui-fg);
  --tui-tabs-selected-bg: light-dark(var(--tui-bg), color-mix(in srgb, var(--tui-bg) 84%, var(--tui-fg)));
  --tui-tabs-selected-fg: var(--tui-fg);
  --tui-tabs-selected-shadow: 0 0 0 1px color-mix(in srgb, var(--tui-fg) 5%, transparent), 0 1px 3px rgb(0 0 0 / 0.08);
  --tui-tabs-ring: var(--tui-ring);
  --tui-tabs-ring-width: 2px;
  --tui-tabs-ring-offset: 2px;
  --tui-tabs-disabled-opacity: 0.5;
}

.dark,
[data-theme="dark"] {
  color-scheme: dark;
  --tui-bg: #0a0a0a;
  --tui-fg: #fafafa;
  --tui-muted: #1c1c1c;
  --tui-muted-fg: #a3a3a3;
  --tui-border: #2a2a2a;
  --tui-primary: #fafafa;
  --tui-primary-fg: #171717;
  --tui-ring: #737373;
  --tui-success: #22c55e;
  --tui-warning: #f59e0b;
  --tui-danger: #ef4444;
}