What just happened
readyClick an in-site link. Watch the URL change and the content cross-fade — but notice the page never blanks out or re-runs the header. That's a client-side swap, not a reload.
Navigations handled this session: 0
SPA router
The links below navigate without a full page reload. The
router intercepts the click, fetches the next page, swaps this
<main>, and updates the URL — animated with the View
Transitions API. It's pure progressive enhancement: turn JS off and every
link is an ordinary navigation. Read how it works →
Try it — instant navigation
These go through the SPA router on this page:
And these deliberately opt out — full navigation, as the rules dictate:
Smooth navigation, zero build step.
One native ES module, modern browser APIs, no dependencies.