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import React, { useEffect, useRef, useState } from "react" | |
export const VisualViewport = ({ | |
as: Element = "div", | |
children, | |
style = {}, | |
...props | |
}) => { | |
const ref = useRef (null) | |
const [viewport, setViewport] = useState ({ | |
"maxHeight": "100vh", | |
"maxWidth": "100vw" | |
}) | |
const updateViewport = () => { | |
setViewport ({ | |
"maxHeight": window.visualViewport.height, | |
"maxWidth": window.visualViewport.width | |
}) | |
window.scrollTo (0, ref.current.offsetTop) | |
} | |
useEffect (() => { | |
if ( | |
typeof window !== "undefined" | |
&& typeof window.visualViewport !== "undefined" | |
) { | |
updateViewport () | |
window.visualViewport.addEventListener ("resize", updateViewport) | |
return () => | |
window.visualViewport.removeEventListener ("resize", updateViewport) | |
} | |
}, []) | |
return ( | |
<Element | |
ref={ref} | |
style={{ ...style, ...viewport }} | |
{...props} | |
> | |
{children} | |
</Element> | |
) | |
} |
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