SandboxFrame now detects Capacitor.isNativePlatform() and branches:
- Web: unchanged iframe.diy postMessage protocol
- Native: creates a WKWebView (iOS) or WebView (Android) overlay with
a custom URL scheme handler that intercepts all requests and routes
them through the same resolveFile/onRpc/injectedScripts/csp props
The consumers (Webxdc, NsitePreviewDialog) require no changes.
iOS plugin uses WKURLSchemeHandler (sbx-<id>://) for origin isolation
and WKScriptMessageHandler for bidirectional message passing.
Android plugin uses shouldInterceptRequest with a blocking CountDownLatch
pattern and addJavascriptInterface for the bridge.
Both plugins overlay the native WebView on top of Capacitor's WebView,
positioned via a placeholder div with ResizeObserver tracking.
Alex Gleason
2418d6af2f