OpenFlare/frontend/components/ui/aurora-background.tsx

'use client';
import { cn } from '@/lib/utils';
import React, { ReactNode, useEffect, useState } from 'react';

interface AuroraBackgroundProps extends React.HTMLProps<HTMLDivElement> {
  children: ReactNode;
  showRadialGradient?: boolean;
}

export const AuroraBackground = ({
  className,
  children,
  showRadialGradient = true,
  ...props
}: AuroraBackgroundProps) => {
  const [isVisible, setIsVisible] = useState(true);

  useEffect(() => {
    const handleVisibilityChange = () => {
      setIsVisible(!document.hidden);
    };

    // Add event listener for page visibility changes
    document.addEventListener('visibilitychange', handleVisibilityChange);

    // Cleanup
    return () => {
      document.removeEventListener('visibilitychange', handleVisibilityChange);
    };
  }, []);

  return (
    <main>
      <div
        className={cn(
          'transition-bg relative flex h-[100vh] flex-col items-center justify-center bg-zinc-50 text-slate-950 dark:bg-zinc-900',
          className,
        )}
        {...props}
      >
        <div
          className='absolute inset-0 overflow-hidden'
          style={
            {
              '--aurora':
                'repeating-linear-gradient(100deg,#3b82f6_10%,#a5b4fc_15%,#93c5fd_20%,#ddd6fe_25%,#60a5fa_30%)',
              '--dark-gradient':
                'repeating-linear-gradient(100deg,#000_0%,#000_7%,transparent_10%,transparent_12%,#000_16%)',
              '--white-gradient':
                'repeating-linear-gradient(100deg,#fff_0%,#fff_7%,transparent_10%,transparent_12%,#fff_16%)',

              '--blue-300': '#93c5fd',
              '--blue-400': '#60a5fa',
              '--blue-500': '#3b82f6',
              '--indigo-300': '#a5b4fc',
              '--violet-200': '#ddd6fe',
              '--black': '#000',
              '--white': '#fff',
              '--transparent': 'transparent',
              // Hide container when page is not visible
              visibility: isVisible ? 'visible' : 'hidden',
            } as React.CSSProperties
          }
        >
          <div
            //   I'm sorry but this is what peak developer performance looks like // trigger warning
            className={cn(
              `after:animate-aurora pointer-events-none absolute -inset-[10px] [background-image:var(--white-gradient),var(--aurora)] [background-size:300%,_200%] [background-position:50%_50%,50%_50%] opacity-50 blur-[10px] invert filter will-change-transform [--aurora:repeating-linear-gradient(100deg,var(--blue-500)_10%,var(--indigo-300)_15%,var(--blue-300)_20%,var(--violet-200)_25%,var(--blue-400)_30%)] [--dark-gradient:repeating-linear-gradient(100deg,var(--black)_0%,var(--black)_7%,var(--transparent)_10%,var(--transparent)_12%,var(--black)_16%)] [--white-gradient:repeating-linear-gradient(100deg,var(--white)_0%,var(--white)_7%,var(--transparent)_10%,var(--transparent)_12%,var(--white)_16%)] after:absolute after:inset-0 after:[background-image:var(--white-gradient),var(--aurora)] after:[background-size:200%,_100%] after:[background-attachment:fixed] after:mix-blend-difference after:content-[""] dark:[background-image:var(--dark-gradient),var(--aurora)] dark:invert-0 after:dark:[background-image:var(--dark-gradient),var(--aurora)]`,

              showRadialGradient &&
                `[mask-image:radial-gradient(ellipse_at_100%_0%,black_10%,var(--transparent)_70%)]`,
            )}
            style={{
              // Pause animation when page is not visible
              animationPlayState: isVisible ? 'running' : 'paused',
            }}
          ></div>
        </div>
        {children}
      </div>
    </main>
  );
};