[!NOTE]
Popper is now Floating UI! For Popper v2, visit
its dedicated branch and its documentation.
For help on migrating, check out the
Migration Guide.
Floating UI is a small library that helps you create
"floating" elements such as tooltips, popovers, dropdowns, and more.
It offers two main features:
- Anchor positioning: Anchor a floating element (such as a tooltip) to
another element (such as a button) while simultaneously ensuring it stays in
view as best as possible by avoiding collisions. This feature is available
for all platforms.
- User interactions for React: Hooks and components for composing
interactions to create accessible floating UI components.
README Contributors
You can support Floating UI in a variety of ways on
Open Collective.
Why
Floating elements are absolutely positioned, typically anchored to another UI
element. Ensuring a floating element remains anchored next to another element
can be challenging, especially in unique layout contexts like scrolling
containers.
Absolute positioning can also cause problems when the floating element is too
close to the edge of the viewport and becomes obscured, also known as a
collision. When a collision occurs, the position must be adjusted to ensure the
floating element remains visible.
Further, floating elements are often interactive, which can raise complex
accessibility issues when designing user interactions.
Floating UI offers a set of low-level features to help you navigate these
challenges and build accessible floating UI components.
Install
To install Floating UI, you can use a package manager like npm or a
CDN. There are different
versions available for different platforms.
Vanilla
Use on the web with vanilla JavaScript.
npm install @floating-ui/dom
You can either start by
reading the tutorial, which teaches you
how to use the library by building a basic tooltip, or you can jump right into
the API documentation.
React
Use with React DOM or
React Native.
React DOM
# Positioning + interactions
npm install @floating-ui/react
# Positioning only (smaller size)
npm install @floating-ui/react-dom
React Native
npm install @floating-ui/react-native
Vue
Use with Vue.
npm install @floating-ui/vue
Canvas or other platforms
If you're targeting a platform other than the vanilla DOM (web), React, or React
Native, you can create your own
Platform. This allows you to support
things like Canvas/WebGL, or other platforms that can run JavaScript.
npm install @floating-ui/core
Contributing
This project is a monorepo written in TypeScript using pnpm
workspaces. The website is using Next.js SSG and Tailwind CSS for styling.
- Fork and clone the repo
- Install dependencies in root directory with
pnpm install
- Build initial package dist files with
pnpm run build
Testing grounds
DOM
pnpm run --filter @floating-ui/dom dev in the root will launch the
@floating-ui/dom development visual tests at http://localhost:1234. The
playground uses React to write each test route, bundled by Vite.
Each route has screenshots taken of the page by Playwright to ensure all the
functionalities work as expected; this is an easy, reliable and high-level way
of testing the positioning logic.
Below the main container are UI controls to turn on certain state and options.
Every single combination of state is tested visually via the snapshots to cover
as much as possible.
React
pnpm run --filter @floating-ui/react dev in the root will launch the
@floating-ui/react development tests at http://localhost:1234.
Credits
The floating shapes in the banner image are made by the amazing artists
@artstar3d,
@killnicole and
@liiiiiiii on Figma — check out their work!
License
MIT
