qwik-breakpoints v1.0.1

Qwik Breakpoints

This package provides utilities to build responsive UIs that react to screen-size changes.

useBreakpointSignal

A layout breakpoint is a viewport size threshold at which a layout shift can occur. The viewport size ranges between breakpoints corresponde to different standard screen sizes.

useBreakpointSignal lets you evaluate media queries to determine the current screen size and react to changes when the viewport size crosses a breakpoint.

import { component$, useComputed$ } from '@builder.io/qwik';
import { Breakpoints, useBreakpointSignal } from 'qwik-breakpoints';

export default component$(() => {
  const bpSignal = useBreakpointSignal([
    Breakpoints.XSmall,
    Breakpoints.Small,
    Breakpoints.Medium,
    Breakpoints.Large,
    Breakpoints.XLarge,
  ]);

  const currentScreenSize = useComputed$(() => {
    const displayNameMap = new Map([
      [Breakpoints.XSmall, 'XSmall'],
      [Breakpoints.Small, 'Small'],
      [Breakpoints.Medium, 'Medium'],
      [Breakpoints.Large, 'Large'],
      [Breakpoints.XLarge, 'XLarge'],
    ]);
    for (const query of Object.keys(bpSignal.value.breakpoints)) {
      if (bpSignal.value.breakpoints[query]) {
        return displayNameMap.get(query) ?? 'Unknown';
      }
    }
  });

  return (
    <>
      <p>Resize your browser window to see the current screen size change.</p>
      <p>
        The current screen size is <strong>{currentScreenSize.value}</strong>
      </p>
    </>
  );
});

React to changes to the viewport

const layoutChanges = useBreakpointSignal([
  '(orientation: portrait)',
  '(orientation: landscape)',
]);

useVisibleTask$(({ track }) => {
  track(() => layoutChanges.value);
  updateMyLayoutForOrientationChange();
}

Predefined breakpoints

The built-in Breakpoints constant offers the following predefinded breakpoints for convenience, originally drawn from the Material Design specification.

You can use these predefined breakpoints with useBreakpointSignal.

const result = useBreakpointSignal([
  Breakpoints.HandsetLandscape,
  Breakpoints.HandsetPortrait
]);

return {
  result.value.matches
  ? <div>Handset</div>
  : <div>Not Handset</div>
}