feat(docs): add preconnect demo to Resource Hints page - #88
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Embed the network-waterfall demo under a new "Why Preconnect Helps" section, letting readers compare connection reuse across HTTP/1.1, keep-alive, HTTP/2, and HTTP/2 + preconnect, and see how preconnect moves the connection setup (DNS, TCP, TLS) off the critical path.
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What
Adds the interactive
network-waterfalldemo to the Resource Hints page, under a new "Why Preconnect Helps" section. Continues the interactive-demos rollout started in #87 (FSL and Long Task).Readers can switch between four scenarios, HTTP/1.1
Connection: close, HTTP/1.1 keep-alive, HTTP/2, and HTTP/2 + preconnect, to see howpreconnectmoves the connection setup (DNS, TCP, TLS) off the critical path.Why
The page documents every resource hint but had no visualization of why
preconnecthelps. The demo adds that temporal "why" a static diagram cannot convey. Framing is intentionally centered on preconnect (the demo's climax scenario); the HTTP-version comparison is context for what a reused connection saves.Changes
network-waterfalldemo via the existingDemocomponent (heightKey="netWaterfallHeight").public/demos/.Verification
Verified at runtime (
next dev): iframe renders inline, auto-height works (627px, content-fit), all four scenario tabs are interactive, light/dark theme syncs, andcheck:consistencypasses.