Resource FallbackZero-Intrusion Frontend Resource Fallback

Runtime retry → multi-CDN fallback → origin recovery for Webpack and Vite build outputs — no business code changes required

Quick Start

GitHub

Zero Business Intrusion

Register the plugin in your build config and you're done. React.lazy, Vue defineAsyncComponent, Vue Router lazy-loaded routes, and other async patterns work without changes.

Script & Style Fallback

Intercepts sync/async JS and CSS loading — Webpack chunk loader, Vite dynamic import, and script/link error events.

Hybrid SW

Optional Service Worker covers img, @font-face, CSS url(), media resources, and controlled CSS @import; scripts remain owned by existing adapters.

Smart Retry + Circuit Breaker

Exponential backoff with jitter avoids thundering herd; per-host circuit breaker skips failed hosts and recovers after cooldown, with cross-tab state sharing.

CSP / SRI Compatible

Supports nonce and externalRuntime modes; SRI strip / keep / strict strategies, plus triple kill switch for emergency shutoff.

Event System

DOM CustomEvents (rf:retry / rf:fallback / rf:success / rf:error) and JS function hooks for monitoring and degraded UI.