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# Component Composition
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## Contents
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- Items always inside their Group component
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- Callouts use Alert
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- Empty states use Empty component
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- Toast notifications use vue-sonner
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- Choosing between overlay components
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- Dialog, Sheet, and Drawer always need a Title
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- Card structure
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- Button has no isPending or isLoading prop
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- TabsTrigger must be inside TabsList
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- Avatar always needs AvatarFallback
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- Use Separator instead of raw hr or border divs
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- Use Skeleton for loading placeholders
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- Use Badge instead of custom styled spans
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---
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## Items always inside their Group component
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Never render items directly inside the content container.
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**Incorrect:**
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```html
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<SelectContent>
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<SelectItem value="apple">Apple</SelectItem>
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<SelectItem value="banana">Banana</SelectItem>
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</SelectContent>
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```
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**Correct:**
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```html
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<SelectContent>
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<SelectGroup>
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<SelectItem value="apple">Apple</SelectItem>
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<SelectItem value="banana">Banana</SelectItem>
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</SelectGroup>
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</SelectContent>
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```
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This applies to all group-based components:
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| Item | Group |
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|------|-------|
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| `SelectItem`, `SelectLabel` | `SelectGroup` |
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| `DropdownMenuItem`, `DropdownMenuLabel`, `DropdownMenuSub` | `DropdownMenuGroup` |
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| `MenubarItem` | `MenubarGroup` |
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| `ContextMenuItem` | `ContextMenuGroup` |
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| `CommandItem` | `CommandGroup` |
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---
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## Callouts use Alert
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```html
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<Alert>
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<AlertTitle>Warning</AlertTitle>
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<AlertDescription>Something needs attention.</AlertDescription>
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</Alert>
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```
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---
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## Empty states use Empty component
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```html
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<Empty>
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<EmptyHeader>
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<EmptyMedia variant="icon"><FolderIcon /></EmptyMedia>
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<EmptyTitle>No projects yet</EmptyTitle>
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<EmptyDescription>Get started by creating a new project.</EmptyDescription>
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</EmptyHeader>
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<EmptyContent>
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<Button>Create Project</Button>
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</EmptyContent>
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</Empty>
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```
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---
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## Toast notifications use vue-sonner
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```js
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<script setup lang="ts">
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import { toast } from "vue-sonner"
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toast.success("Changes saved.")
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toast.error("Something went wrong.")
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toast("File deleted.", {
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action: { label: "Undo", onClick: () => undoDelete() },
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})
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</script>
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```
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---
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## Choosing between overlay components
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| Use case | Component |
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|----------|-----------|
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| Focused task that requires input | `Dialog` |
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| Destructive action confirmation | `AlertDialog` |
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| Side panel with details or filters | `Sheet` |
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| Mobile-first bottom panel | `Drawer` |
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| Quick info on hover | `HoverCard` |
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| Small contextual content on click | `Popover` |
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---
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## Dialog, Sheet, and Drawer always need a Title
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`DialogTitle`, `SheetTitle`, `DrawerTitle` are required for accessibility. Use `class="sr-only"` if visually hidden.
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```vue
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<DialogContent>
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<DialogHeader>
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<DialogTitle>Edit Profile</DialogTitle>
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<DialogDescription>Update your profile.</DialogDescription>
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</DialogHeader>
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...
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</DialogContent>
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```
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---
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## Card structure
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Use full composition — don't dump everything into `CardContent`:
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```html
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<Card>
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<CardHeader>
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<CardTitle>Team Members</CardTitle>
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<CardDescription>Manage your team.</CardDescription>
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</CardHeader>
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<CardContent>...</CardContent>
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<CardFooter>
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<Button>Invite</Button>
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</CardFooter>
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</Card>
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```
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---
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## Button has no isPending or isLoading prop
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Compose with `Spinner` + `data-icon` + `disabled`:
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```html
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<Button disabled>
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<Spinner data-icon="inline-start" />
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Saving...
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</Button>
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```
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---
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## TabsTrigger must be inside TabsList
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Never render `TabsTrigger` directly inside `Tabs` — always wrap in `TabsList`:
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```html
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<Tabs default-value="account">
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<TabsList>
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<TabsTrigger value="account">Account</TabsTrigger>
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<TabsTrigger value="password">Password</TabsTrigger>
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</TabsList>
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<TabsContent value="account">...</TabsContent>
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</Tabs>
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```
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---
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## Avatar always needs AvatarFallback
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Always include `AvatarFallback` for when the image fails to load:
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```html
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<Avatar>
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<AvatarImage src="/avatar.png" alt="User" />
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<AvatarFallback>JD</AvatarFallback>
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</Avatar>
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```
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---
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## Use existing components instead of custom markup
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| Instead of | Use |
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|---|---|
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| `<hr>` or `<div class="border-t">` | `<Separator />` |
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| `<div class="animate-pulse">` with styled divs | `<Skeleton class="h-4 w-3/4" />` |
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| `<span class="rounded-full bg-green-100 ...">` | `<Badge variant="secondary">` |
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@@ -0,0 +1,207 @@
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# Forms & Inputs
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## Contents
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- Forms use FieldGroup + Field
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- InputGroup requires InputGroupInput/InputGroupTextarea
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- Buttons inside inputs use InputGroup + InputGroupAddon
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- Option sets (2–7 choices) use ToggleGroup
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- FieldSet + FieldLegend for grouping related fields
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- Field validation and disabled states
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---
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## Forms use FieldGroup + Field
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Always use `FieldGroup` + `Field` — never raw `div` with `space-y-*`:
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```vue
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<FieldGroup>
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<Field>
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<FieldLabel for="email">Email</FieldLabel>
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<Input id="email" type="email" />
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</Field>
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<Field>
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<FieldLabel for="password">Password</FieldLabel>
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<Input id="password" type="password" />
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</Field>
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</FieldGroup>
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```
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Use `Field orientation="horizontal"` for settings pages. Use `FieldLabel class="sr-only"` for visually hidden labels.
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**Choosing form controls:**
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- Simple text input → `Input`
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- Dropdown with predefined options → `Select`
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- Searchable dropdown → `Combobox`
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- Native HTML select (no JS) → `native-select`
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- Boolean toggle → `Switch` (for settings) or `Checkbox` (for forms)
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- Single choice from few options → `RadioGroup`
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- Toggle between 2–7 options → `ToggleGroup` + `ToggleGroupItem`
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- OTP/verification code → `InputOTP`
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- Multi-line text → `Textarea`
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---
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## InputGroup requires InputGroupInput/InputGroupTextarea
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Never use raw `Input` or `Textarea` inside an `InputGroup`.
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**Incorrect:**
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```html
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<InputGroup>
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<Input placeholder="Search..." />
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</InputGroup>
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```
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**Correct:**
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```js
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<script setup lang="ts">
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import { InputGroup, InputGroupInput } from "@/components/ui/input-group"
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</script>
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<template>
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<InputGroup>
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<InputGroupInput placeholder="Search..." />
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</InputGroup>
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</template>
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```
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---
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## Buttons inside inputs use InputGroup + InputGroupAddon
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Never place a `Button` directly inside or adjacent to an `Input` with custom positioning.
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**Incorrect:**
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```html
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<div class="relative">
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<Input placeholder="Search..." class="pr-10" />
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<Button class="absolute right-0 top-0" size="icon">
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<SearchIcon />
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</Button>
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</div>
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```
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**Correct:**
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```js
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<script setup lang="ts">
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import { InputGroup, InputGroupInput, InputGroupAddon } from "@/components/ui/input-group"
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</script>
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<template>
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<InputGroup>
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<InputGroupInput placeholder="Search..." />
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<InputGroupAddon>
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<Button size="icon">
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<SearchIcon data-icon="inline-start" />
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</Button>
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</InputGroupAddon>
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</InputGroup>
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</template>
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```
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---
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## Option sets (2–7 choices) use ToggleGroup
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Don't manually loop `Button` components with active state.
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**Incorrect:**
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```js
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<script setup lang="ts">
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const selected = ref("daily")
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const options = ["daily", "weekly", "monthly"]
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</script>
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<template>
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<div class="flex gap-2">
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<Button
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v-for="option in options"
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:key="option"
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:variant="selected === option ? 'default' : 'outline'"
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@click="selected = option"
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>
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{{ option }}
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</Button>
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</div>
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</template>
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```
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**Correct:**
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```js
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<script setup lang="ts">
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import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"
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</script>
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<template>
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<ToggleGroup spacing="2">
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<ToggleGroupItem value="daily">Daily</ToggleGroupItem>
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<ToggleGroupItem value="weekly">Weekly</ToggleGroupItem>
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<ToggleGroupItem value="monthly">Monthly</ToggleGroupItem>
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</ToggleGroup>
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</template>
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```
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Combine with `Field` for labelled toggle groups:
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```html
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<Field orientation="horizontal">
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<FieldTitle id="theme-label">Theme</FieldTitle>
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<ToggleGroup aria-labelledby="theme-label" spacing="2">
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<ToggleGroupItem value="light">Light</ToggleGroupItem>
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<ToggleGroupItem value="dark">Dark</ToggleGroupItem>
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<ToggleGroupItem value="system">System</ToggleGroupItem>
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</ToggleGroup>
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</Field>
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```
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---
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## FieldSet + FieldLegend for grouping related fields
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Use `FieldSet` + `FieldLegend` for related checkboxes, radios, or switches — not `div` with a heading:
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```html
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<FieldSet>
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<FieldLegend variant="label">Preferences</FieldLegend>
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<FieldDescription>Select all that apply.</FieldDescription>
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<FieldGroup class="gap-3">
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<Field orientation="horizontal">
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<Checkbox id="dark" />
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<FieldLabel for="dark" class="font-normal">Dark mode</FieldLabel>
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</Field>
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</FieldGroup>
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</FieldSet>
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```
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---
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## Field validation and disabled states
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Both attributes are needed — `data-invalid`/`data-disabled` styles the field (label, description), while `aria-invalid`/`disabled` styles the control.
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```html
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<!-- Invalid. -->
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<Field data-invalid>
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<FieldLabel for="email">Email</FieldLabel>
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<Input id="email" aria-invalid />
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<FieldDescription>Invalid email address.</FieldDescription>
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</Field>
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<!-- Disabled. -->
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<Field data-disabled>
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<FieldLabel for="email">Email</FieldLabel>
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<Input id="email" disabled />
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</Field>
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```
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Works for all controls: `Input`, `Textarea`, `Select`, `Checkbox`, `RadioGroupItem`, `Switch`, `Slider`, `NativeSelect`, `InputOTP`.
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@@ -0,0 +1,111 @@
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# Icons
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**Always use the project's configured `iconLibrary` for imports.** Check the `iconLibrary` field from project context: `lucide` → `@lucide/vue`, `tabler` → `@tabler/icons-vue`, etc. Never assume `@lucide/vue`.
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|
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---
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||||
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## Icons in Button use data-icon attribute
|
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Add `data-icon="inline-start"` (prefix) or `data-icon="inline-end"` (suffix) to the icon. No sizing classes on the icon.
|
||||
|
||||
**Incorrect:**
|
||||
|
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```html
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<Button>
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<SearchIcon class="mr-2 size-4" />
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Search
|
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</Button>
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```
|
||||
|
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**Correct:**
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|
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```html
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<Button>
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<SearchIcon data-icon="inline-start"/>
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Search
|
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</Button>
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<Button>
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Next
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<ArrowRightIcon data-icon="inline-end"/>
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</Button>
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```
|
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|
||||
---
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||||
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## No sizing classes on icons inside components
|
||||
|
||||
Components handle icon sizing via CSS. Don't add `size-4`, `w-4 h-4`, or other sizing classes to icons inside `Button`, `DropdownMenuItem`, `Alert`, `Sidebar*`, or other shadcn components. Unless the user explicitly asks for custom icon sizes.
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```html
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||||
<Button>
|
||||
<SearchIcon class="size-4" data-icon="inline-start" />
|
||||
Search
|
||||
</Button>
|
||||
|
||||
<DropdownMenuItem>
|
||||
<SettingsIcon class="mr-2 size-4" />
|
||||
Settings
|
||||
</DropdownMenuItem>
|
||||
```
|
||||
|
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**Correct:**
|
||||
|
||||
```html
|
||||
<Button>
|
||||
<SearchIcon data-icon="inline-start" />
|
||||
Search
|
||||
</Button>
|
||||
|
||||
<DropdownMenuItem>
|
||||
<SettingsIcon />
|
||||
Settings
|
||||
</DropdownMenuItem>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Pass icons as component objects, not string keys
|
||||
|
||||
Use `:icon="CheckIcon"`, not a string key to a lookup map.
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```js
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||||
<script setup lang="ts">
|
||||
const iconMap = {
|
||||
check: CheckIcon,
|
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alert: AlertIcon,
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}
|
||||
|
||||
defineProps({
|
||||
icon: String
|
||||
})
|
||||
</script>
|
||||
|
||||
<template>
|
||||
<component :is="iconMap[icon]" />
|
||||
</template>
|
||||
```
|
||||
|
||||
**Correct:**
|
||||
|
||||
```js
|
||||
<script setup lang="ts">
|
||||
// Import from the project's configured iconLibrary (e.g. @lucide/vue, @tabler/icons-vue).
|
||||
import { CheckIcon } from "@lucide/vue"
|
||||
|
||||
defineProps({
|
||||
icon: Object // Or Component
|
||||
})
|
||||
</script>
|
||||
|
||||
<template>
|
||||
<component :is="icon" />
|
||||
</template>
|
||||
|
||||
<!-- Usage -->
|
||||
<StatusBadge :icon="CheckIcon" />
|
||||
```
|
||||
@@ -0,0 +1,166 @@
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||||
# Styling & Customization
|
||||
|
||||
See [customization.md](../customization.md) for theming, CSS variables, and adding custom colors.
|
||||
|
||||
## Contents
|
||||
|
||||
- Semantic colors
|
||||
- Built-in variants first
|
||||
- class for layout only
|
||||
- No space-x-* / space-y-*
|
||||
- Prefer size-* over w-* h-* when equal
|
||||
- Prefer truncate shorthand
|
||||
- No manual dark: color overrides
|
||||
- Use cn() for conditional classes
|
||||
- No manual z-index on overlay components
|
||||
|
||||
---
|
||||
|
||||
## Semantic colors
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```html
|
||||
<div class="bg-blue-500 text-white">
|
||||
<p class="text-gray-600">Secondary text</p>
|
||||
</div>
|
||||
```
|
||||
|
||||
**Correct:**
|
||||
|
||||
```html
|
||||
<div class="bg-primary text-primary-foreground">
|
||||
<p class="text-muted-foreground">Secondary text</p>
|
||||
</div>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## No raw color values for status/state indicators
|
||||
|
||||
For positive, negative, or status indicators, use Badge variants, semantic tokens like `text-destructive`, or define custom CSS variables — don't reach for raw Tailwind colors.
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```html
|
||||
<span class="text-emerald-600">+20.1%</span>
|
||||
<span class="text-green-500">Active</span>
|
||||
<span class="text-red-600">-3.2%</span>
|
||||
```
|
||||
|
||||
**Correct:**
|
||||
|
||||
```html
|
||||
<Badge variant="secondary">+20.1%</Badge>
|
||||
<Badge>Active</Badge>
|
||||
<span class="text-destructive">-3.2%</span>
|
||||
```
|
||||
|
||||
If you need a success/positive color that doesn't exist as a semantic token, use a Badge variant or ask the user about adding a custom CSS variable to the theme (see [customization.md](../customization.md)).
|
||||
|
||||
---
|
||||
|
||||
## Built-in variants first
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```html
|
||||
<Button class="border border-input bg-transparent hover:bg-accent">
|
||||
Click me
|
||||
</Button>
|
||||
```
|
||||
|
||||
**Correct:**
|
||||
|
||||
```html
|
||||
<Button variant="outline">Click me</Button>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## class for layout only
|
||||
|
||||
Use `class` for layout (e.g. `max-w-md`, `mx-auto`, `mt-4`), **not** for overriding component colors or typography. To change colors, use semantic tokens, built-in variants, or CSS variables.
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```html
|
||||
<Card class="bg-blue-100 text-blue-900 font-bold">
|
||||
<CardContent>Dashboard</CardContent>
|
||||
</Card>
|
||||
```
|
||||
|
||||
**Correct:**
|
||||
|
||||
```html
|
||||
<Card class="max-w-md mx-auto">
|
||||
<CardContent>Dashboard</CardContent>
|
||||
</Card>
|
||||
```
|
||||
|
||||
To customize a component's appearance, prefer these approaches in order:
|
||||
1. **Built-in variants** — `variant="outline"`, `variant="destructive"`, etc.
|
||||
2. **Semantic color tokens** — `bg-primary`, `text-muted-foreground`.
|
||||
3. **CSS variables** — define custom colors in the global CSS file (see [customization.md](../customization.md)).
|
||||
|
||||
---
|
||||
|
||||
## No space-x-* / space-y-*
|
||||
|
||||
Use `gap-*` instead. `space-y-4` → `flex flex-col gap-4`. `space-x-2` → `flex gap-2`.
|
||||
|
||||
```html
|
||||
<div class="flex flex-col gap-4">
|
||||
<Input />
|
||||
<Input />
|
||||
<Button>Submit</Button>
|
||||
</div>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Prefer size-* over w-* h-* when equal
|
||||
|
||||
`size-10` not `w-10 h-10`. Applies to icons, avatars, skeletons, etc.
|
||||
|
||||
---
|
||||
|
||||
## Prefer truncate shorthand
|
||||
|
||||
`truncate` not `overflow-hidden text-ellipsis whitespace-nowrap`.
|
||||
|
||||
---
|
||||
|
||||
## No manual dark: color overrides
|
||||
|
||||
Use semantic tokens — they handle light/dark via CSS variables. `bg-background text-foreground` not `bg-white dark:bg-gray-950`.
|
||||
|
||||
---
|
||||
|
||||
## Use cn() for conditional classes
|
||||
|
||||
Use the `cn()` utility from the project for conditional or merged class names. Don't write manual ternaries in class strings.
|
||||
|
||||
**Incorrect:**
|
||||
|
||||
```html
|
||||
<div :class="`flex items-center ${isActive ? 'bg-primary text-primary-foreground' : 'bg-muted'}`">
|
||||
```
|
||||
|
||||
**Correct:**
|
||||
|
||||
```js
|
||||
<script setup lang="ts">
|
||||
import { cn } from "@/lib/utils"
|
||||
</script>
|
||||
|
||||
<template>
|
||||
<div :class="cn('flex items-center', isActive ? 'bg-primary text-primary-foreground' : 'bg-muted')">
|
||||
</template>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## No manual z-index on overlay components
|
||||
|
||||
`Dialog`, `Sheet`, `Drawer`, `AlertDialog`, `DropdownMenu`, `Popover`, `Tooltip`, `HoverCard` handle their own stacking. Never add `z-50` or `z-[999]`.
|
||||
Reference in new issue
Block a user