mastodon/app/javascript/mastodon/features/ui/hooks/useBreakpoint.tsx

import { useSyncExternalStore } from 'react';

const breakpoints = {
  narrow: 479, // Device width under which horizontal space is constrained
  openable: 759, // Device width at which the sidebar becomes an openable hamburger menu
  full: 1174, // Device width at which all 3 columns can be displayed
};

type Breakpoint = keyof typeof breakpoints;

export const useBreakpoint = (breakpoint: Breakpoint) => {
  const query = `(max-width: ${breakpoints[breakpoint]}px)`;

  const isMatching = useSyncExternalStore(
    (callback) => {
      const mediaWatcher = window.matchMedia(query);

      mediaWatcher.addEventListener('change', callback);

      return () => {
        mediaWatcher.removeEventListener('change', callback);
      };
    },
    () => window.matchMedia(query).matches,
  );

  return isMatching;
};

interface WithBreakpointType {
  matchesBreakpoint: boolean;
}

export function withBreakpoint<P>(
  Component: React.ComponentType<P & WithBreakpointType>,
  breakpoint: Breakpoint = 'full',
) {
  const displayName = `withMobileLayout(${Component.displayName ?? Component.name})`;

  const ComponentWithBreakpoint = (props: P) => {
    const matchesBreakpoint = useBreakpoint(breakpoint);

    return <Component matchesBreakpoint={matchesBreakpoint} {...props} />;
  };

  ComponentWithBreakpoint.displayName = displayName;

  return ComponentWithBreakpoint;
}