---
title: January 2026 - Inline Start and End Styles
description: We've updated the styles for Base UI components to support inline-start and inline-end side values.
date: 2026-01-23
---

We've updated the styles for Base UI components to support `inline-start` and `inline-end` side values. The following components now support these values:

- Tooltip
- Popover
- Combobox
- Context Menu
- Dropdown Menu
- Hover Card
- Menubar
- Select

### What Changed

We added new Tailwind classes to handle the logical side values:

```diff
<PopoverPrimitive.Popup
  className={cn(
    "... 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
+   data-[side=inline-start]:slide-in-from-right-2
+   data-[side=inline-end]:slide-in-from-left-2 ...",
    className
  )}
/>
```

### Usage

```tsx
<Popover>
  <PopoverTrigger>Open</PopoverTrigger>
  <PopoverContent side="inline-start">
    {/* Opens on the left in LTR, right in RTL */}
  </PopoverContent>
</Popover>
```

### LLM Prompt

Ask your LLM to update your components by running the following prompt:

```txt showLineNumbers
Add inline-start and inline-end support to my shadcn/ui components. Add the following Tailwind classes to each component:

| File | Component | Add Classes |
|------|-----------|-------------|
| tooltip.tsx | TooltipContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |
| tooltip.tsx | TooltipArrow | `data-[side=inline-start]:top-1/2! data-[side=inline-start]:-right-1 data-[side=inline-start]:-translate-y-1/2
data-[side=inline-end]:top-1/2! data-[side=inline-end]:-left-1 data-[side=inline-end]:-translate-y-1/2` |
| popover.tsx | PopoverContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |
| hover-card.tsx | HoverCardContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |
| select.tsx | SelectContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2
data-[align-trigger=true]:animate-none` and add `data-align-trigger={alignItemWithTrigger}` attribute |
| combobox.tsx | ComboboxContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |
| dropdown-menu.tsx | DropdownMenuContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |
| context-menu.tsx | ContextMenuContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |
| menubar.tsx | MenubarContent | `data-[side=inline-start]:slide-in-from-right-2 data-[side=inline-end]:slide-in-from-left-2` |

Add these classes next to the existing `data-[side=top]`, `data-[side=bottom]`, `data-[side=left]`, `data-[side=right]` classes.
```
