50:I[707087,["/_next/static/immutable/chunks/2985g-hklwiee.js","/_next/static/immutable/chunks/0qkc3dps_9x_i.js","/_next/static/immutable/chunks/2nvof3-29tvc3.js","/_next/static/immutable/chunks/3thksmxn95rly.js","/_next/static/immutable/chunks/15bpbjna9-vr3.js","/_next/static/immutable/chunks/3tjobt77z_9dj.js","/_next/static/immutable/chunks/0agonoz1szsjm.js","/_next/static/immutable/chunks/1ynd3dcge2kn1.js","/_next/static/immutable/chunks/0krdn-21gkgjt.js","/_next/static/immutable/chunks/0n9w9riw96l80.js","/_next/static/immutable/chunks/0w75qangey2ys.js","/_next/static/immutable/chunks/1tge7vcvsb70s.js","/_next/static/immutable/chunks/35ju_ac0ysz07.js"],"RegistryDependencies"] 51:I[512940,["/_next/static/immutable/chunks/2985g-hklwiee.js","/_next/static/immutable/chunks/0qkc3dps_9x_i.js","/_next/static/immutable/chunks/2nvof3-29tvc3.js","/_next/static/immutable/chunks/3thksmxn95rly.js","/_next/static/immutable/chunks/15bpbjna9-vr3.js","/_next/static/immutable/chunks/3tjobt77z_9dj.js","/_next/static/immutable/chunks/0agonoz1szsjm.js","/_next/static/immutable/chunks/1ynd3dcge2kn1.js","/_next/static/immutable/chunks/0krdn-21gkgjt.js","/_next/static/immutable/chunks/0n9w9riw96l80.js","/_next/static/immutable/chunks/0w75qangey2ys.js","/_next/static/immutable/chunks/1tge7vcvsb70s.js","/_next/static/immutable/chunks/35ju_ac0ysz07.js"],"Installation"] 52:I[314491,["/_next/static/immutable/chunks/2985g-hklwiee.js","/_next/static/immutable/chunks/0qkc3dps_9x_i.js","/_next/static/immutable/chunks/2nvof3-29tvc3.js","/_next/static/immutable/chunks/3thksmxn95rly.js","/_next/static/immutable/chunks/15bpbjna9-vr3.js","/_next/static/immutable/chunks/3tjobt77z_9dj.js","/_next/static/immutable/chunks/0agonoz1szsjm.js","/_next/static/immutable/chunks/1ynd3dcge2kn1.js","/_next/static/immutable/chunks/0krdn-21gkgjt.js","/_next/static/immutable/chunks/0n9w9riw96l80.js","/_next/static/immutable/chunks/0w75qangey2ys.js","/_next/static/immutable/chunks/1tge7vcvsb70s.js","/_next/static/immutable/chunks/35ju_ac0ysz07.js"],"FilesView"] 53:Ted1,"use client"; import { type ComponentProps, useCallback, useEffect, useRef, useState, } from "react"; import { ArrowDownIcon } from "lucide-react"; import { cn } from "@/lib/utils"; import { field, floating, paper } from "./surfaces"; export interface ScrollAnchorMessage { role: "user" | "assistant"; text: string; } const INITIAL_COUNT = 3; const APPEND_MS = 1300; export function ScrollAnchor({ messages, paused = false, onSettled, className, ...props }: Omit< ComponentProps<"div">, "children" | "messages" | "paused" | "onSettled" > & { messages: ScrollAnchorMessage[]; paused?: boolean; onSettled?: () => void; }) { const viewportRef = useRef(null); const [count, setCount] = useState(INITIAL_COUNT); const [pinned, setPinned] = useState(true); const [seenCount, setSeenCount] = useState(INITIAL_COUNT); useEffect(() => { if (paused) return; const id = setInterval(() => { setCount((current) => { if (current >= messages.length) return current; return current + 1; }); }, APPEND_MS); return () => clearInterval(id); }, [messages.length, paused]); useEffect(() => { if (count >= messages.length && pinned) onSettled?.(); }, [count, pinned, messages.length, onSettled]); useEffect(() => { if (count === INITIAL_COUNT + 1) { setPinned(false); const viewport = viewportRef.current; if (viewport) viewport.scrollTo({ top: 0, behavior: "smooth" }); } }, [count]); useEffect(() => { const viewport = viewportRef.current; if (!viewport) return; if (pinned) { viewport.scrollTo({ top: viewport.scrollHeight }); setSeenCount(count); } }, [count, pinned]); const jump = useCallback(() => { const viewport = viewportRef.current; if (viewport) { viewport.scrollTo({ top: viewport.scrollHeight, behavior: "smooth" }); } setPinned(true); setSeenCount(count); }, [count]); useEffect(() => { if (paused || pinned || count - seenCount < 2) return; const id = setTimeout(jump, 2400); return () => clearTimeout(id); }, [paused, pinned, count, seenCount, jump]); const newCount = count - seenCount; return (

{messages.slice(0, count).map((message, i) => (

{message.text}

))}

{!pinned && newCount > 0 && ( )}

); } 4c:["$","div",null,{"className":"flex flex-col gap-12","children":[["$","div",null,{"className":"pt-10 flex flex-col gap-4","children":[["$","ul",null,{"className":"flex gap-2 flex-wrap","children":[["$","li","lucide-react",{"children":["$","a",null,{"href":"https://www.npmjs.com/package/lucide-react","target":"_blank","rel":"noopener noreferrer","className":"rounded-md border p-2 text-sm flex items-center gap-1 ","children":[["$","svg",null,{"viewBox":"0 0 24 24","className":"size-3","children":["$","path",null,{"d":"M1.763 0C.786 0 0 .786 0 1.763v20.474C0 23.214.786 24 1.763 24h20.474c.977 0 1.763-.786 1.763-1.763V1.763C24 .786 23.214 0 22.237 0zM5.13 5.323l13.837.019-.009 13.836h-3.464l.01-10.382h-3.456L12.04 19.17H5.113z","fill":"currentColor"}]}],["$","span",null,{"className":"text-xs font-medium","children":"lucide-react"}]]}]}]]}],["$","$L50",null,{"registryDependencies":["https://r.assistant-ui.com/elements-surfaces.json"]}]]}],["$","$L51",null,{"sourceUrl":"https://r.assistant-ui.com/elements-scroll-anchor.json","proxyUrl":"https://shadcnregistry.com/r/assistant-ui/elements-scroll-anchor","itemId":"@assistant-ui/elements-scroll-anchor"}],["$","section",null,{"className":"flex flex-col gap-4","id":"files","children":[["$","h2",null,{"className":"text-lg md:text-2xl font-bold font-mono","children":"Files"}],["$","$L52",null,{"files":[{"path":"components/elements/scroll-anchor.tsx","content":"$53","type":"registry:component"}]}]]}],"$L54"]}]

Scroll Anchor

Installation

Files

components

Styles