---
title: v1.0.0-beta.3
subtitle: Sep 3, 2025
description: v1.0.0-beta.3 release notes. Sep 3, 2025.
---

# v1.0.0-beta.3

v1.0.0-beta.3 release notes. Sep 3, 2025.

## General changes

- **Breaking change:** Base UI event details.
  Custom event callbacks provide BaseUIChangeEventDetails object as their second parameter.
  This object contains the source event, reason and methods to customize the behavior (where applicable).
  For example, `onOpenChange(open, event, reason)` becomes `onOpenChange(open, eventDetails)`, where `eventDetails` contains `event` and `reason` properties.
  ([#2382](https://github.com/mui/base-ui/pull/2382))

## Alert Dialog

- **Breaking change:** Support `initialFocus` and `finalFocus` functions.
  The `initialFocus` and `finalFocus` props can be functions that return DOM elements to focus.
  This is a new feature for `finalFocus` and a breaking change for `initialFocus` as the element must be returned directly (not as a ref).
  ([#2536](https://github.com/mui/base-ui/pull/2536))

## Autocomplete

- New Autocomplete component ([#2105](https://github.com/mui/base-ui/pull/2105))

## Checkbox

- Fix missing validity attributes when wrapped in `<Field>` ([#2572](https://github.com/mui/base-ui/pull/2572))

## Combobox

- New Combobox component ([#2105](https://github.com/mui/base-ui/pull/2105))

## Context Menu

- Fix default offsets when `align="center"` or `side` differs ([#2601](https://github.com/mui/base-ui/pull/2601))

## Dialog

- **Breaking change:** Support `initialFocus` and `finalFocus` functions.
  The `initialFocus` and `finalFocus` props can be functions that return DOM elements to focus.
  This is a new feature for `finalFocus` and a breaking change for `initialFocus` as the element must be returned directly (not as a ref).
  ([#2536](https://github.com/mui/base-ui/pull/2536))
- Restore focus to popup when focused element is removed ([#2479](https://github.com/mui/base-ui/pull/2479))

## Field

- Prevent defaultValue reset on focus for uncontrolled inputs ([#2543](https://github.com/mui/base-ui/pull/2543))
- Allow `onValueChange` to fire when `defaultValue`/`value` are not set ([#2600](https://github.com/mui/base-ui/pull/2600))

## Input

- Allow `onValueChange` to fire when `defaultValue`/`value` are not set ([#2600](https://github.com/mui/base-ui/pull/2600))

## Menu

- **Breaking change:** Fix `closeParentOnEsc` default value.
  The default value of `closeParentOnEsc` in Menu.SubmenuRoot is now false.
  When the <kbd>Esc</kbd> key is pressed in a Submenu, the Submenu closes, and the focus correctly moves to the SubmenuTrigger.
  ([#2493](https://github.com/mui/base-ui/pull/2493))
- **Breaking change:** Support `initialFocus` and `finalFocus` functions.
  The `initialFocus` and `finalFocus` props can be functions that return DOM elements to focus.
  This is a new feature for `finalFocus` and a breaking change for `initialFocus` as the element must be returned directly (not as a ref).
  ([#2536](https://github.com/mui/base-ui/pull/2536))
- Fix menu not opening when inside context menu trigger ([#2506](https://github.com/mui/base-ui/pull/2506))
- Fix `transform-origin` variable calculation when Positioner `sideOffset` is a function ([#2511](https://github.com/mui/base-ui/pull/2511))
- Fix submenu events ([#2483](https://github.com/mui/base-ui/pull/2483))
- Fix `limitShift` offset based on arrow size ([#2571](https://github.com/mui/base-ui/pull/2571))

## Navigation Menu

- **Breaking change:** Semantic element structure and `active` page prop.
  `<NavigationMenu.List>` renders `<ul>` and `<NavigationMenu.Item>` renders `<li>` by default.
  ([#2526](https://github.com/mui/base-ui/pull/2526))
- Unshare `AbortController` instance ([#2441](https://github.com/mui/base-ui/pull/2441))
- Close on link click by default ([#2535](https://github.com/mui/base-ui/pull/2535))

## Number Field

- Fix duplicate `onValueChange` calls ([#2591](https://github.com/mui/base-ui/pull/2591))

## Popover

- **Breaking change:** Support `initialFocus` and `finalFocus` functions.
  The `initialFocus` and `finalFocus` props can be functions that return DOM elements to focus.
  This is a new feature for `finalFocus` and a breaking change for `initialFocus` as the element must be returned directly (not as a ref).
  ([#2536](https://github.com/mui/base-ui/pull/2536))
- Fix outside click after right clicking in popup ([#2508](https://github.com/mui/base-ui/pull/2508))
- Fix unexpected close when nested inside two popovers ([#2481](https://github.com/mui/base-ui/pull/2481))
- Fix `transform-origin` variable calculation when Positioner `sideOffset` is a function ([#2511](https://github.com/mui/base-ui/pull/2511))
- Restore focus to popup when focused element is removed ([#2479](https://github.com/mui/base-ui/pull/2479))
- Fix `limitShift` offset based on arrow size ([#2571](https://github.com/mui/base-ui/pull/2571))

## Preview Card

- Fix `transform-origin` variable calculation when Positioner `sideOffset` is a function ([#2511](https://github.com/mui/base-ui/pull/2511))
- Fix `limitShift` offset based on arrow size ([#2571](https://github.com/mui/base-ui/pull/2571))

## Radio Group

- Return null in form data when no option selected ([#2473](https://github.com/mui/base-ui/pull/2473))

## Scroll Area

- Prevent pointer events from sibling portals triggering hover ([#2542](https://github.com/mui/base-ui/pull/2542))

## Select

- Fix stale `items` prop ([#2397](https://github.com/mui/base-ui/pull/2397))
- Fix unexpected close when nested inside two popovers ([#2481](https://github.com/mui/base-ui/pull/2481))
- Fix `onValueChange` type inference ([#2372](https://github.com/mui/base-ui/pull/2372))
- Fix `transform-origin` variable calculation when Positioner `sideOffset` is a function ([#2511](https://github.com/mui/base-ui/pull/2511))
- Reset state when selected item is removed ([#2577](https://github.com/mui/base-ui/pull/2577))
- Fix `data-highlighted` and DOM focus item desync ([#2569](https://github.com/mui/base-ui/pull/2569))
- Fix item click with `defaultOpen` prop ([#2570](https://github.com/mui/base-ui/pull/2570))
- Fix scroll arrows not propagating scroll fully to start/end of list ([#2523](https://github.com/mui/base-ui/pull/2523))
- Fix `limitShift` offset based on arrow size ([#2571](https://github.com/mui/base-ui/pull/2571))

## Slider

- **Breaking change:** Instead of the thumb div, the `input type="range"` element receives focus. Focus styles that were targeting the thumb, should be updated.
  For example `.Thumb:focus-visible` should be replaced with `.Thumb:has(:focus-visible)`.
  The `tabIndex` prop is moved from Root to Thumb where it gets forwarded to the input.
  The thumb's `render` prop no longer contains the third `inputProps` argument; the input element is instead merged with children.
  ([#2578](https://github.com/mui/base-ui/pull/2578))
- Reduce bundle size ([#2551](https://github.com/mui/base-ui/pull/2551))
- Fix thumb `:focus-visible` with mixed keyboard and pointer modality ([#2584](https://github.com/mui/base-ui/pull/2584))
- Add `index` prop to `<Slider.Thumb>` ([#2593](https://github.com/mui/base-ui/pull/2593))

## Tabs

- Fix tab size rounding ([#2488](https://github.com/mui/base-ui/pull/2488))
- Fix highlight sync when focus is inside list ([#2487](https://github.com/mui/base-ui/pull/2487))

## Tooltip

- Fix `transform-origin` variable calculation when Positioner `sideOffset` is a function ([#2511](https://github.com/mui/base-ui/pull/2511))
- Fix `limitShift` offset based on arrow size ([#2571](https://github.com/mui/base-ui/pull/2571))

## useRender

- Add support for data-\* attributes ([#2524](https://github.com/mui/base-ui/pull/2524))
- Add `defaultTagName` parameter ([#2527](https://github.com/mui/base-ui/pull/2527))