--- title: 'Speculation Rules' slug: speculation-rules ogTitle: 'Instant navigations with Speculation Rules' description: 'Prefetch and prerender same-site URLs via a typed speculationRules option, injected as a ## Speculation Rules The [Speculation Rules API](https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API) lets the browser prefetch or prerender same-site URLs ahead of a navigation, so the next page loads instantly. Pass a typed `speculationRules` object to `Mochi.serve()` and Mochi injects it as a `