useMeasure
Effortlessly measure and track your component’s dimensions with useMeasure.
Install:
npm i @uidotdev/usehooks
Description:
The useMeasure hook provides a convenient and efficient way to monitor and respond to changes in the size of a React component. This custom hook uses the ResizeObserver API to actively track changes in the component’s dimensions, such as width and height, and keeps them available as state. The returned ref is used on the element whose dimensions you want to measure, making it a valuable tool for responsive design and dynamic layout adjustments.
Return Value
| Name | Type | Description |
|---|---|---|
| ref | React ref object | A React reference that can be attached to a DOM element to observe. |
| rect | object | An object containing the width and height of the observed element. |
rect Object Properties
| Property | Type | Description |
|---|---|---|
| width | number | Width of the observed element. |
| height | number | Height of the observed element. |
Demo:
Example:
import * as React from "react";
import { useMeasure } from "@uidotdev/usehooks";
function Measure({ type = "horizontal" }) {
const [ref, { width, height }] = useMeasure();
return (
<figure>
<figcaption>
<span>{type}</span>
</figcaption>
<article
ref={ref}
className={type}
style={{
resize: type
}}
>
{type === "horizontal" ? (
<label>width: {Math.floor(width)}</label>
) : (
<label>height: {Math.floor(height)}</label>
)}
</article>
</figure>
);
}
export default function App() {
return (
<section>
<h1>useMeasure</h1>
<p>(Resize the rulers)</p>
<Measure />
</section>
);
}
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