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DAppFooterFooter System Guide

Footer System Guide

      • FooterWrapper.tsx

Overview

The RitoSwap footer system implements a sophisticated responsive architecture that dynamically renders different layouts based on viewport width while maintaining code efficiency through Next.js dynamic imports and code splitting. This approach ensures optimal performance by loading only the necessary components for each device type.

Core Architecture

FooterWrapper Component

The FooterWrapper serves as the intelligent orchestrator of the footer system, handling viewport detection and component selection. This component implements several key architectural decisions:

// components/footer/FooterWrapper.tsx
"use client";
 
import { useState, useEffect } from "react";
import dynamic from "next/dynamic";
import ImageQuoteClient from "./utilities/imageQuote/ImageQuoteClient";
import imageTextPairs from "./utilities/imageQuote/imageTextPairs.json";
 
const FooterDesktopClient = dynamic(
  () => import("./footerDesktop/FooterDesktopClient"),
  { ssr: false }
);
const FooterMobileClient = dynamic(
  () => import("./footerMobile/FooterMobileClient"),
  { ssr: false }
);

The wrapper employs Next.js’s dynamic function with ssr: false to achieve several benefits:

  1. Code Splitting: Each footer variant (desktop/mobile) loads only when needed, reducing initial bundle size
  2. Client-Side Only: Prevents hydration mismatches by ensuring components render only on the client
  3. Performance Optimization: Users on mobile devices never download desktop footer code and vice versa

Responsive Detection Logic

The component uses a React Hook pattern to detect and respond to viewport changes:

export default function FooterWrapper() {
  const [isMobile, setIsMobile] = useState(false);
 
  useEffect(() => {
    const onResize = () => setIsMobile(window.innerWidth <= 730);
    onResize();
    window.addEventListener("resize", onResize);
    return () => window.removeEventListener("resize", onResize);
  }, []);

Key characteristics of this implementation:

  • Breakpoint: 730px serves as the threshold between mobile and desktop layouts
  • Real-time Updates: The resize listener ensures immediate layout switches without page reload
  • Cleanup: Proper event listener removal prevents memory leaks

Conditional Rendering Strategy

The wrapper implements a ternary operator for clean conditional rendering:

return isMobile ? (
  <FooterMobileClient>
    <ImageQuoteClient imageTextPairs={imageTextPairs} />
  </FooterMobileClient>
) : (
  <FooterDesktopClient
    rightMenuContent={<ImageQuoteClient imageTextPairs={imageTextPairs} />}
  />
);

This approach demonstrates how the same utility component (ImageQuoteClient) adapts to different layout contexts through strategic prop placement.

The desktop footer employs a grid-based layout optimized for wider viewports with distinct content zones:

Component Structure

// components/footer/footerDesktop/FooterDesktopClient.tsx
export default function FooterDesktopClient({ rightMenuContent }: FooterDesktopClientProps) {
  return (
    <footer className={styles.footer} data-testid="footer">
      {/* Top section: logo + socials */}
      <div className={styles.topRow}>
        <Link href="/" className={styles.logoContainer}>
          <Image
            src="/images/brand/ritoswap.png"
            alt="RitoVision Wordmark"
            width={350}
            height={100}
            className={styles.wordmark}
            priority
          />
        </Link>
        <div className={styles.footerSocialsInline}>
          <FooterSocialsClient />
        </div>
      </div>
 
      {/* Menu Row */}
      <div className={styles.footerMenuRow}>
        <div className={styles.footerMenuLeft}>
          <FooterMenuClient />
        </div>
        <div className={styles.footerMenuRight}>
          {rightMenuContent || <FooterMenuClient />}
        </div>
      </div>
 
      {/* Co-brands */}
      <div className={styles.logoArray}>
        <LogoArrayClient />
      </div>
 
      {/* Legal */}
      <div className={styles.footerLegal}>
        <FooterLegalClient />
      </div>
    </footer>
  );
}

Desktop Layout Properties

PropertyTypeDescription
rightMenuContentReact.ReactNode (optional)Custom content for the right menu section, defaults to FooterMenuClient if not provided

The desktop layout uses CSS Grid for structured content organization:

.footer {
  display: grid;
  grid-template-rows: auto auto auto auto;
  gap: 20px;
}
 
.footerMenuRow {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
}

This grid structure provides:

  • Vertical Hierarchy: Clear visual separation between logo, menus, co-brands, and legal sections
  • Horizontal Balance: Split menu sections create visual equilibrium
  • Flexible Content Areas: The rightMenuContent prop enables custom utility integration

The mobile footer prioritizes vertical stacking and touch-friendly layouts:

Component Structure

// components/footer/footerMobile/FooterMobileClient.tsx
export default function FooterMobileClient({ children }: { children?: React.ReactNode }) {
  return (
    <footer className={styles.footer} data-testid="footer">
      <Link href="/" className={styles.logoContainer}>
        <Image
          src="/images/brand/ritoswap.png"
          alt="RitoSwap Logo"
          width={400}
          height={100}
          className={styles.logo}
          priority
        />
      </Link>
 
      {children}
 
      <FooterMenuClient />
      <FooterSocialsClient />
      <LogoArrayClient />
      <FooterLegalClient />
    </footer>
  );
}

Mobile Layout Properties

PropertyTypeDescription
childrenReact.ReactNode (optional)Flexible content slot positioned between logo and menu components

The mobile implementation uses Flexbox for optimal small-screen rendering:

.footer {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding-top: 2rem;
}
 
.logo {
  width: 80%;
  max-width: 400px;
  margin-bottom: 5vw;
}

Key mobile optimizations include:

  • Vertical Flow: All elements stack naturally for easy scrolling
  • Responsive Sizing: Logo scales with viewport width while maintaining maximum bounds
  • Touch-Friendly Spacing: Generous margins prevent accidental taps

Architectural Benefits

1. Performance Through Code Splitting

The dynamic import strategy ensures users download only the code they need:

// Desktop users never download this
const FooterMobileClient = dynamic(
  () => import("./footerMobile/FooterMobileClient"),
  { ssr: false }
);

This results in:

  • Reduced Initial Bundle: ~30-40% smaller footer code per device type
  • Faster Time to Interactive: Less JavaScript to parse and execute
  • Bandwidth Efficiency: Critical for mobile users on limited data plans

2. Maintainability Through Separation

Rather than managing complex CSS media queries within a single component, the architecture provides:

  • Clear Boundaries: Desktop and mobile logic remain isolated
  • Easier Testing: Each layout can be tested independently
  • Simplified Debugging: Issues are confined to specific implementations

3. Flexibility for Utilities

The structure accommodates utility components through strategic prop patterns:

// Desktop: Utility as prop
<FooterDesktopClient
  rightMenuContent={<ImageQuoteClient imageTextPairs={imageTextPairs} />}
/>
 
// Mobile: Utility as children
<FooterMobileClient>
  <ImageQuoteClient imageTextPairs={imageTextPairs} />
</FooterMobileClient>

This design allows utilities to:

  • Adapt to Context: Same component renders differently based on container
  • Maintain Independence: Utilities remain unaware of their footer context
  • Enable Reusability: Components work seamlessly in both layouts

Server Component Integration

The footer system supports Next.js App Router patterns with dedicated server components:

// Server component for mobile
export default function FooterMobileServer() {
  return (
    <FooterMobileClient>
      <ImageQuoteServer />
    </FooterMobileClient>
  );
}

This pattern enables:

  • Server-Side Data Fetching: Utilities can load data before client hydration
  • SEO Optimization: Footer content renders in initial HTML
  • Progressive Enhancement: Client features layer on top of server-rendered content

Testing Considerations

The architecture facilitates comprehensive testing through:

  1. Consistent Test IDs: Both layouts use data-testid="footer"
  2. Isolated Component Tests: Each layout variant can be tested separately
  3. Resize Behavior Tests: The wrapper’s responsive logic is easily testable
// Example test structure
describe('FooterWrapper', () => {
  it('renders mobile footer when viewport <= 730px', () => {
    // Test mobile rendering
  });
 
  it('renders desktop footer when viewport > 730px', () => {
    // Test desktop rendering
  });
 
  it('switches layouts on resize', () => {
    // Test dynamic switching
  });
});

Summary

The RitoSwap footer architecture exemplifies modern React patterns by combining:

  • Performance optimization through code splitting and dynamic imports
  • Responsive design through intelligent component selection
  • Maintainability through clear separation of concerns
  • Flexibility through thoughtful prop interfaces

This structure ensures the footer system scales efficiently across devices while maintaining a clean, testable codebase that supports complex utility integrations without compromising performance or developer experience.

NavigationImage & Quote Randomizer