fix: useSmooth dev mode lagging

apps/docs/package.json

@@ -23,7 +23,7 @@
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-tooltip": "^1.1.2",
     "@radix-ui/themes": "^3.1.1",
-    "ai": "^3.2.19",
+    "ai": "^3.2.22",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
     "fumadocs-core": "12.4.2",

examples/search-agent-for-e-commerce/package.json

@@ -16,7 +16,7 @@
     "@radix-ui/react-popover": "^1.1.1",
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-tooltip": "^1.1.2",
-    "ai": "^3.2.19",
+    "ai": "^3.2.22",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
     "embla-carousel-autoplay": "^8.1.6",

examples/with-inline-suggestions/package.json

@@ -15,7 +15,7 @@
     "@radix-ui/react-avatar": "^1.1.0",
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-tooltip": "^1.1.2",
-    "ai": "^3.2.19",
+    "ai": "^3.2.22",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
     "lucide-react": "^0.407.0",

examples/with-openai-assistants/package.json

@@ -13,12 +13,12 @@
     "@assistant-ui/react": "workspace:*",
     "@assistant-ui/react-ai-sdk": "workspace:*",
     "@radix-ui/react-avatar": "^1.1.0",
-    "ai": "^3.2.19",
+    "ai": "^3.2.22",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
     "lucide-react": "^0.407.0",
     "next": "14.2.5",
-    "openai": "^4.52.5",
+    "openai": "^4.52.7",
     "react": "^18",
     "react-dom": "^18",
     "tailwind-merge": "^2.4.0",

examples/with-playground/next-env.d.ts

@@ -0,0 +1,5 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.

examples/with-vercel-ai-rsc/package.json

@@ -16,7 +16,7 @@
     "@radix-ui/react-icons": "^1.3.0",
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-tooltip": "^1.1.2",
-    "ai": "3.2.19",
+    "ai": "3.2.22",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
     "lucide-react": "^0.407.0",

packages/react-markdown/src/primitives/MarkdownText.tsx

@@ -1,3 +1,5 @@
+"use client";
+
 import { INTERNAL, useContentPartText } from "@assistant-ui/react";
 import type { ComponentType, FC } from "react";
 import ReactMarkdown, { type Options } from "react-markdown";

packages/react/package.json

@@ -29,7 +29,7 @@
     "conversational-ui",
     "conversational-ai"
   ],
-  "version": "0.4.0",
+  "version": "0.4.1",
   "license": "MIT",
   "exports": {
     ".": {

packages/react/src/primitives/contentPart/ContentPartText.tsx

@@ -1,3 +1,5 @@
+"use client";
+
 import { Primitive } from "@radix-ui/react-primitive";
 import { type ElementRef, forwardRef, ComponentPropsWithoutRef } from "react";
 import { useContentPartText } from "../../primitive-hooks/contentPart/useContentPartText";

packages/react/src/ui/thread-config.tsx

@@ -1,3 +1,5 @@
+"use client";
+
 import { FC, PropsWithChildren, createContext, useContext } from "react";
 
 import { AvatarProps } from "./base/avatar";

packages/react/src/utils/hooks/useSmooth.tsx

@@ -1,3 +1,5 @@
+"use client";
+
 import { useEffect, useState } from "react";
 
 class TextStreamAnimator {
@@ -7,7 +9,8 @@ class TextStreamAnimator {
   public targetText: string = "";
 
   constructor(
-    private setText: (callback: (prevText: string) => string) => void,
+    public currentText: string,
+    private setText: (newText: string) => void,
   ) {}
 
   start() {
@@ -28,40 +31,35 @@ class TextStreamAnimator {
     const deltaTime = currentTime - this.lastUpdateTime;
     let timeToConsume = deltaTime;
 
-    this.setText((currentText) => {
-      const targetText = this.targetText;
-
-      if (currentText === targetText) {
-        this.animationFrameId = null;
-        return currentText;
-      }
-
-      const remainingChars = targetText.length - currentText.length;
-      const baseTimePerChar = Math.min(5, 250 / remainingChars);
+    const remainingChars = this.targetText.length - this.currentText.length;
+    const baseTimePerChar = Math.min(5, 250 / remainingChars);
 
-      let charsToAdd = 0;
-      while (timeToConsume >= baseTimePerChar && charsToAdd < remainingChars) {
-        charsToAdd++;
-        timeToConsume -= baseTimePerChar;
-      }
+    let charsToAdd = 0;
+    while (timeToConsume >= baseTimePerChar && charsToAdd < remainingChars) {
+      charsToAdd++;
+      timeToConsume -= baseTimePerChar;
+    }
 
+    if (charsToAdd !== remainingChars) {
       this.animationFrameId = requestAnimationFrame(this.animate);
-
-      if (charsToAdd === 0) {
-        return currentText;
-      }
-
-      const newText = targetText.slice(0, currentText.length + charsToAdd);
-      this.lastUpdateTime = currentTime - timeToConsume;
-      return newText;
-    });
+    } else {
+      this.animationFrameId = null;
+    }
+    if (charsToAdd === 0) return;
+
+    this.currentText = this.targetText.slice(
+      0,
+      this.currentText.length + charsToAdd,
+    );
+    this.lastUpdateTime = currentTime - timeToConsume;
+    this.setText(this.currentText);
   };
 }
 
 export const useSmooth = (text: string, smooth: boolean = false) => {
   const [displayedText, setDisplayedText] = useState(text);
   const [animatorRef] = useState<TextStreamAnimator>(
-    new TextStreamAnimator(setDisplayedText),
+    new TextStreamAnimator(text, setDisplayedText),
   );
 
   useEffect(() => {
@@ -72,8 +70,10 @@ export const useSmooth = (text: string, smooth: boolean = false) => {
 
     if (!text.startsWith(animatorRef.targetText)) {
       setDisplayedText(text);
+      animatorRef.currentText = text;
       animatorRef.targetText = text;
       animatorRef.stop();
+
       return;
     }