Add offline support to svg-render.html via Service Worker

[Copilot]

Enables svg-render.html to function completely offline after first visit, with no UI changes.

Implementation

• Service Worker (svg-render-sw.js): Caches HTML page and example SVG on install, serves from cache with network fallback
• Registration: Added ~7 lines to svg-render.html to register worker with feature detection

// Register service worker for offline support
if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('/svg-render-sw.js')
        .catch((error) => {
            console.log('Service worker registration failed:', error);
        });
}

The Service Worker implements:

• Install: Cache HTML and example SVG resources
• Fetch: Cache-first strategy with network fallback
• Activate: Clean up old cache versions

All functionality (paste SVG, convert, download) works offline after initial online visit.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Make svg-render.html available offline</issue_title>
<issue_description>As an experiment which can then apply to others as well.

Instructions to coding agents:

Modify svg-render.html to work offline - with no extra UI, but it should load without a network connection if the user has visited at least once.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Make svg-render.html available offline #92

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[cloudflare-workers-and-pages]

Deploying tools with    Cloudflare Pages

Latest commit:	1b6309c
Status:	✅  Deploy successful!
Preview URL:	https://7a69b1d9.tools-b1q.pages.dev
Branch Preview URL:	https://copilot-make-svg-render-offl.tools-b1q.pages.dev

View logs