--- title: "Streaming SSR" description: "Stream head tags as async components resolve during Svelte SSR" canonical_url: "https://unhead.unjs.io/docs/svelte/head/guides/core-concepts/streaming" last_updated: "2026-06-30T06:59:43.213Z" --- Standard SSR waits for everything to render before sending HTML. Streaming sends the document shell immediately, then streams content as async components resolve. The problem: async components using `useHead()` set head tags *after* the initial render. Without streaming support, those tags never reach the client's ``. Unhead's streaming integration solves this by injecting `

{data.content}

``` ## When to Skip If your Svelte SSR is fully synchronous, stick with standard SSR. The streaming setup adds complexity for no benefit when all head tags are available at initial render.