svelte/server

import { 
function render<Comp extends SvelteComponent<any> | Component<any>, Props extends ComponentProps<Comp> = ComponentProps<Comp>>(...args: {} extends Props ? [component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp, options?: {  props?: Omit<Props, "$$slots" | "$$events">;  context?: Map<any, any>;  idPrefix?: string; }] : [component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp, options: {  props: Omit<Props, "$$slots" | "$$events">;  context?: Map<any, any>;  idPrefix?: string; }]): RenderOutput
Only available on the server and when compiling with the server option. Takes a component and returns an object with body and head properties on it, which you can use to populate the HTML when server-rendering your app.
 render } from 'svelte/server';