use-device-pixel-ratio

 

useDevicePixelRatio() is a React hook (and utility) that will tell you what the current device has as its Device Pixel Ratio (DPR). The hook is reactive - if the browser window moves to a different display with a different DPR, it will update automatically. If you only need to get the DPR statically, there is a function (getDevicePixelRatio()) equivalent.

Installing

``
npm i use-device-pixel-ratio
`

Server rendering

When rendering on the server or in browsers that do not support the devicePixelRatio property, it will default to 1 unless overriden by using the defaultDpr option.

Rounding/limiting

The hook (by default) both rounds and limits the DPR - it will round _down_ by default, and cap the number at 3. In other words, you should by default only have three values returned: 1, 2 or 3. To allow larger DPRs, pass a higher number to the maxDpr option. To prevent rounding, pass round: false.

Usage

Default usage

`jsx
import {useDevicePixelRatio} from 'use-device-pixel-ratio'

async function MyComponent() {
const dpr = useDevicePixelRatio()
return https://my.image.host/file.jpg?dpr=${dpr}}>
}
`

Setting higher limit

`jsx
import {useDevicePixelRatio} from 'use-device-pixel-ratio'

async function MyComponent() {
const dpr = useDevicePixelRatio({maxDpr: 50})
return