Select — logic2b/ui

import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"

export default function SelectDemo() {
  return (
    <Select>
      <SelectTrigger className="w-[180px]">
        <SelectValue placeholder="Select a fruit" />
      </SelectTrigger>
      <SelectContent>
        <SelectItem value="apple">Apple</SelectItem>
        <SelectItem value="banana">Banana</SelectItem>
        <SelectItem value="blueberry">Blueberry</SelectItem>
        <SelectItem value="grapes">Grapes</SelectItem>
        <SelectItem value="pineapple">Pineapple</SelectItem>
      </SelectContent>
    </Select>
  )
}

Installation

npx logic2b@latest add select

Working with an AI assistant? Copy this prompt into Claude Code, Cursor or Copilot — it carries the install steps, a no-CLI fallback and a verification checklist.

Add the "select" item from the logic2b ui registry (https://ui.logic2b.com) to this project. Follow every step and verify at the end.

## Steps

1. If the project has no `components.json` yet, set up logic2b ui first:

   ```bash
   npx logic2b@latest init
   ```

2. Install the item (the CLI resolves registry dependencies automatically):

   ```bash
   npx logic2b@latest add select
   ```

3. Install any npm dependencies the command prints.

## If the CLI is not available

Do it manually from the registry payload:

1. Fetch https://ui.logic2b.com/r/select.json.
2. Write every entry in `files[]` to its mapped project path (see below).
3. Repeat (recursively) for each name in `registryDependencies`.
4. Install every package listed in `dependencies` across those payloads.

## Registry reference

- Index of every item: https://ui.logic2b.com/r/index.json
- Item payload (full source): https://ui.logic2b.com/r/<name>.json
- Usage examples per item: https://ui.logic2b.com/r/demos/index.json → https://ui.logic2b.com/r/demos/<demo>.json
- Docs index for agents: https://ui.logic2b.com/llms.txt (full docs: https://ui.logic2b.com/llms-full.txt)
- Every docs page is Markdown when you append `.md` to its URL.

Registry file paths map to project paths like this:
- `ui/*` → `@/components/ui/*`
- `blocks/<name>/*` → `@/components/*`
- `charts/*` → `@/components/charts/*`
- `hooks/*` → `@/hooks/*`
- `lib/utils.ts` → `@/lib/utils.ts`
- `theme.css` → next to the project's Tailwind entry stylesheet

## Conventions (do not break these)

- Tailwind CSS v4 (CSS-first config; no tailwind.config.js needed) and React 19.
- All colors go through semantic tokens (`bg-primary`, `text-muted-foreground`,
  `border-border`, …). Never hardcode hex/oklch values in components.
- Dark mode is class-based: toggle `.dark` on `<html>`.
- Icons come from lucide-react.

## Verify before finishing

1. The dev server starts and the app renders without console errors.
2. TypeScript compiles (`tsc --noEmit` or the framework's check).
3. Components use the theme: a `<Button>` shows the primary token color,
   and toggling `.dark` on `<html>` switches the palette.

Install the dependencies:

npm install radix-ui lucide-react

Copy into ui/select.tsx:

"use client"

import * as React from "react"
import { Select as SelectPrimitive } from "radix-ui"
import { CheckIcon, ChevronDownIcon, ChevronUpIcon } from "lucide-react"

import { cn } from "@/lib/utils"

function Select({
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Root>) {
  return <SelectPrimitive.Root data-slot="select" {...props} />
}

function SelectGroup({
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Group>) {
  return <SelectPrimitive.Group data-slot="select-group" {...props} />
}

function SelectValue({
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Value>) {
  return <SelectPrimitive.Value data-slot="select-value" {...props} />
}

function SelectTrigger({
  className,
  size = "default",
  children,
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Trigger> & {
  size?: "sm" | "default"
}) {
  return (
    <SelectPrimitive.Trigger
      data-slot="select-trigger"
      data-size={size}
      className={cn(
        "border-input data-[placeholder]:text-muted-foreground [&_svg:not([class*='text-'])]:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 dark:hover:bg-input/50 flex w-fit items-center justify-between gap-2 rounded-md border bg-transparent px-3 py-2 text-sm whitespace-nowrap shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 data-[size=default]:h-9 data-[size=sm]:h-8 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-2 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
        className
      )}
      {...props}
    >
      {children}
      <SelectPrimitive.Icon asChild>
        <ChevronDownIcon className="size-4 opacity-50" />
      </SelectPrimitive.Icon>
    </SelectPrimitive.Trigger>
  )
}

function SelectContent({
  className,
  children,
  position = "popper",
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Content>) {
  return (
    <SelectPrimitive.Portal>
      <SelectPrimitive.Content
        data-slot="select-content"
        className={cn(
          "bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 relative z-50 max-h-(--radix-select-content-available-height) min-w-[8rem] origin-(--radix-select-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border shadow-md",
          position === "popper" &&
            "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
          className
        )}
        position={position}
        {...props}
      >
        <SelectScrollUpButton />
        <SelectPrimitive.Viewport
          className={cn(
            "p-1",
            position === "popper" &&
              "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)] scroll-my-1"
          )}
        >
          {children}
        </SelectPrimitive.Viewport>
        <SelectScrollDownButton />
      </SelectPrimitive.Content>
    </SelectPrimitive.Portal>
  )
}

function SelectLabel({
  className,
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Label>) {
  return (
    <SelectPrimitive.Label
      data-slot="select-label"
      className={cn("text-muted-foreground px-2 py-1.5 text-xs", className)}
      {...props}
    />
  )
}

function SelectItem({
  className,
  children,
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Item>) {
  return (
    <SelectPrimitive.Item
      data-slot="select-item"
      className={cn(
        "focus:bg-accent focus:text-accent-foreground [&_svg:not([class*='text-'])]:text-muted-foreground relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 *:[span]:last:flex *:[span]:last:items-center *:[span]:last:gap-2",
        className
      )}
      {...props}
    >
      <span className="absolute right-2 flex size-3.5 items-center justify-center">
        <SelectPrimitive.ItemIndicator>
          <CheckIcon className="size-4" />
        </SelectPrimitive.ItemIndicator>
      </span>
      <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
    </SelectPrimitive.Item>
  )
}

function SelectSeparator({
  className,
  ...props
}: React.ComponentProps<typeof SelectPrimitive.Separator>) {
  return (
    <SelectPrimitive.Separator
      data-slot="select-separator"
      className={cn("bg-border pointer-events-none -mx-1 my-1 h-px", className)}
      {...props}
    />
  )
}

function SelectScrollUpButton({
  className,
  ...props
}: React.ComponentProps<typeof SelectPrimitive.ScrollUpButton>) {
  return (
    <SelectPrimitive.ScrollUpButton
      data-slot="select-scroll-up-button"
      className={cn(
        "flex cursor-default items-center justify-center py-1",
        className
      )}
      {...props}
    >
      <ChevronUpIcon className="size-4" />
    </SelectPrimitive.ScrollUpButton>
  )
}

function SelectScrollDownButton({
  className,
  ...props
}: React.ComponentProps<typeof SelectPrimitive.ScrollDownButton>) {
  return (
    <SelectPrimitive.ScrollDownButton
      data-slot="select-scroll-down-button"
      className={cn(
        "flex cursor-default items-center justify-center py-1",
        className
      )}
      {...props}
    >
      <ChevronDownIcon className="size-4" />
    </SelectPrimitive.ScrollDownButton>
  )
}

export {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectLabel,
  SelectScrollDownButton,
  SelectScrollUpButton,
  SelectSeparator,
  SelectTrigger,
  SelectValue,
}

Usage

import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"

<Select>
  <SelectTrigger className="w-[180px]">
    <SelectValue placeholder="Select a fruit" />
  </SelectTrigger>
  <SelectContent>
    <SelectItem value="apple">Apple</SelectItem>
  </SelectContent>
</Select>

API

Prop	Type	Default
`value` / `defaultValue` (Select)	`string`	—
`onValueChange` (Select)	`(value: string) => void`	—
`disabled` (Select)	`boolean`	`false`
`size` (SelectTrigger)	`sm \| default`	`default`
`position` (SelectContent)	`popper \| item-aligned`	`popper`
`disabled` (SelectItem)	`boolean`	`false`

Examples

Grouped options

import {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectLabel,
  SelectSeparator,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"

export default function SelectGroupsDemo() {
  return (
    <Select>
      <SelectTrigger className="w-[200px]">
        <SelectValue placeholder="Select a timezone" />
      </SelectTrigger>
      <SelectContent>
        <SelectGroup>
          <SelectLabel>North America</SelectLabel>
          <SelectItem value="est">Eastern (EST)</SelectItem>
          <SelectItem value="cst">Central (CST)</SelectItem>
          <SelectItem value="pst">Pacific (PST)</SelectItem>
        </SelectGroup>
        <SelectSeparator />
        <SelectGroup>
          <SelectLabel>Europe</SelectLabel>
          <SelectItem value="gmt">Greenwich (GMT)</SelectItem>
          <SelectItem value="cet">Central European (CET)</SelectItem>
        </SelectGroup>
      </SelectContent>
    </Select>
  )
}

With a disabled option

import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"

export default function SelectDisabledDemo() {
  return (
    <Select defaultValue="starter">
      <SelectTrigger size="sm" className="w-[180px]">
        <SelectValue placeholder="Select a plan" />
      </SelectTrigger>
      <SelectContent>
        <SelectItem value="starter">Starter</SelectItem>
        <SelectItem value="pro">Pro</SelectItem>
        <SelectItem value="enterprise" disabled>
          Enterprise (contact us)
        </SelectItem>
      </SelectContent>
    </Select>
  )
}

Accessibility

Built on Radix Select, following the WAI-ARIA listbox pattern.

Fully keyboard operable: open with Enter/Space/arrow keys, move with arrows, and type-ahead to jump to an option.
Esc closes the list and focus returns to the trigger.
The trigger exposes the selected value to assistive technology; use SelectValue’s placeholder for the empty state.
Group related options with SelectGroup + SelectLabel for clearer announcements.