useResponsiveValue

The useResponsiveValue is a client side hook. It can be used to return values based on the current screen size, using breakpoints from the theme theme.screens.

The first parameter of the hook is an array of values, one for each breakpoint (starting from no breakpoint, then sm, md, lg, etc.). The second parameter is the defaultIndex which points to the default value used during server-side rendering.

The breakpoints are defined as a screens object in your theme (e.g. { sm: '40rem', md: '48rem', ... }), matching Tailwind v4's responsive modifiers (like sm:text-sm). If no theme provides screens, the hook falls back to reading Tailwind v4's --breakpoint-* CSS custom properties.

Import

import { useResponsiveValue } from '@marigold/system';

Examples

Breakpoints

With the use of Tailwind CSS, some classes came along with which makes it easy to use different styles on different screen sizes. Here you can see a combination of the useResponsiveValue hook and the Tailwind screen sizes.

For example if you want to change background-color for different screen sizes you have to use this code below. You can see that according to the screen size the text value will change. You can try out yourself and resize the screen.

import { useResponsiveValue } from '@marigold/system';export default () => {  const value = useResponsiveValue(    ['no breakpoint', 'sm', 'md', 'lg', 'xl', '2xl'],    2  );  return (    <div className="sm:bg-lime-600 md:bg-lime-500 lg:bg-lime-400 xl:bg-lime-300 2xl:bg-lime-200">      {value}    </div>  );};

useSmallScreen

We also have a function that checks if the window is on a small screen size. This can be used if you just want to change something just on small screen size.

The example code shows that when it is a small screen the display css value will change.

import { useSmallScreen } from '@marigold/system';

const isSmallScreen = useSmallScreen();
...
<div className={cn(isSmallScreen ? 'hidden' : 'block')}>random div</div>