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Markdown

# Popup
React component that wraps mapbox-gl's [Popup](https://docs.mapbox.com/mapbox-gl-js/api/markers/#popup) class.
```tsx
import * as React from 'react';
import {useState} from 'react';
import Map, {Popup} from 'react-map-gl/mapbox';
import 'mapbox-gl/dist/mapbox-gl.css';
function App() {
const [showPopup, setShowPopup] = useState<boolean>(true);
return <Map
mapboxAccessToken="<Mapbox access token>"
initialViewState={{
longitude: -100,
latitude: 40,
zoom: 3.5
}}
mapStyle="mapbox://styles/mapbox/streets-v9"
>
{showPopup && (
<Popup longitude={-100} latitude={40}
anchor="bottom"
onClose={() => setShowPopup(false)}>
You are here
</Popup>)}
</Map>;
}
```
## Properties
### Reactive Properties
#### `anchor`: 'center' | 'left' | 'right' | 'top' | 'bottom' | 'top-left' | 'top-right' | 'bottom-left' | 'bottom-right' | undefined {#anchor}
A string indicating the part of the popup that should be positioned closest to the coordinate, set via `longitude` and `latitude`.
If unset, the anchor will be dynamically set to ensure the popup falls within the map container with a preference for `'bottom'`.
#### `className`: string {#classname}
Space-separated CSS class names to add to popup container.
#### `offset`: number | [PointLike](./types.md#pointlike) | Record\<string, [PointLike](./types.md#pointlike)\> {#offset}
Default: `null`
A pixel offset applied to the popup's location specified as:
- a single number specifying a distance from the popup's location
- a PointLike specifying a constant offset
- an object of Points specifing an offset for each anchor position.
Negative offsets indicate left and up.
#### `maxWidth`: string {#maxwidth}
Default: `240px`
A string that sets the CSS property of the popup's maximum width.
#### `style`: CSSProperties {#style}
CSS style override that applies to the popup's container.
### Callbacks
#### `onOpen`: (evt: [PopupEvent](./types.md#popupevent)) => void {#onopen}
Called when the popup is opened.
#### `onClose`: (evt: [PopupEvent](./types.md#popupevent)) => void {#onclose}
Called when the popup is closed by the user clicking on the close button or outside (if `closeOnClick: true`).
### Other Properties
The properties in this section are not reactive. They are only used when the component first mounts.
Any options supported by the `Popup` class ([Mapbox](https://docs.mapbox.com/mapbox-gl-js/api/markers/#popup) | [Maplibre](https://maplibre.org/maplibre-gl-js/docs/API/type-aliases/PopupOptions/)), such as
- `closeButton`
- `closeOnClick`
- `closeOnMove`
- `focusAfterOpen`
## Methods
The underlying native `Popup` instance is accessible via a [React ref](https://reactjs.org/docs/refs-and-the-dom.html#creating-refs) hook.
You may use it to call any imperative methods:
```tsx
import * as React from 'react';
import {useRef, useEffect} from 'react';
import Map, {Popup} from 'react-map-gl/mapbox';
import mapboxgl from 'mapbox-gl';
function App() {
const popupRef = useRef<mapboxgl.Popup>();
useEffect(() => {
popupRef.current?.trackPointer();
}, [popupRef.current])
return <Map>
<Popup longitude={-122.4} latitude={37.8} ref={popupRef} >
Tooltip
</Popup>
</Map>;
}
```
## Source
[popup.ts](https://github.com/visgl/react-map-gl/tree/8.0-release/modules/react-mapbox/src/components/popup.ts)