🚸 Improve chat auto scroll

Instead of scrolling all the way to the bottom on each bubble, now we scroll to the top of the last bubble

Closes #486

packages/embeds/js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@typebot.io/js",
-  "version": "0.0.48",
+  "version": "0.0.49",
   "description": "Javascript library to display typebots on your website",
   "type": "module",
   "main": "dist/index.js",

packages/embeds/js/src/components/ConversationContainer/ChatChunk.tsx

@@ -15,7 +15,7 @@ type Props = Pick<ChatReply, 'messages' | 'input'> & {
   hasError: boolean
   hideAvatar: boolean
   onNewBubbleDisplayed: (blockId: string) => Promise<void>
-  onScrollToBottom: () => void
+  onScrollToBottom: (top?: number) => void
   onSubmit: (input: string) => void
   onSkip: () => void
   onAllBubblesDisplayed: () => void
@@ -31,15 +31,15 @@ export const ChatChunk = (props: Props) => {
     props.onScrollToBottom()
   })
 
-  const displayNextMessage = async () => {
+  const displayNextMessage = async (bubbleOffsetTop?: number) => {
     const lastBubbleBlockId = props.messages[displayedMessageIndex()].id
     await props.onNewBubbleDisplayed(lastBubbleBlockId)
     setDisplayedMessageIndex(
       displayedMessageIndex() === props.messages.length
         ? displayedMessageIndex()
         : displayedMessageIndex() + 1
     )
-    props.onScrollToBottom()
+    props.onScrollToBottom(bubbleOffsetTop)
     if (displayedMessageIndex() === props.messages.length) {
       props.onAllBubblesDisplayed()
     }

packages/embeds/js/src/components/ConversationContainer/ConversationContainer.tsx

@@ -44,7 +44,6 @@ type Props = {
 
 export const ConversationContainer = (props: Props) => {
   let chatContainer: HTMLDivElement | undefined
-  let bottomSpacer: HTMLDivElement | undefined
   const [chatChunks, setChatChunks] = createSignal<
     Pick<ChatReply, 'messages' | 'input' | 'clientSideActions'>[]
   >([
@@ -153,10 +152,9 @@ export const ConversationContainer = (props: Props) => {
     ])
   }
 
-  const autoScrollToBottom = () => {
-    if (!bottomSpacer) return
+  const autoScrollToBottom = (offsetTop?: number) => {
     setTimeout(() => {
-      chatContainer?.scrollTo(0, chatContainer.scrollHeight)
+      chatContainer?.scrollTo(0, offsetTop ?? chatContainer.scrollHeight)
     }, 50)
   }
 
@@ -227,14 +225,11 @@ export const ConversationContainer = (props: Props) => {
           </div>
         )}
       </Show>
-      <BottomSpacer ref={bottomSpacer} />
+      <BottomSpacer />
     </div>
   )
 }
 
-type BottomSpacerProps = {
-  ref: HTMLDivElement | undefined
-}
-const BottomSpacer = (props: BottomSpacerProps) => {
-  return <div ref={props.ref} class="w-full h-32 flex-shrink-0" />
+const BottomSpacer = () => {
+  return <div class="w-full h-32 flex-shrink-0" />
 }

packages/embeds/js/src/components/bubbles/HostBubble.tsx

@@ -18,12 +18,12 @@ import { Match, Switch } from 'solid-js'
 type Props = {
   message: ChatMessage
   typingEmulation: TypingEmulation
-  onTransitionEnd: () => void
+  onTransitionEnd: (offsetTop?: number) => void
 }
 
 export const HostBubble = (props: Props) => {
-  const onTransitionEnd = () => {
-    props.onTransitionEnd()
+  const onTransitionEnd = (offsetTop?: number) => {
+    props.onTransitionEnd(offsetTop)
   }
 
   return (

packages/embeds/js/src/features/blocks/bubbles/audio/components/AudioBubble.tsx

@@ -4,7 +4,7 @@ import { createSignal, onCleanup, onMount } from 'solid-js'
 
 type Props = {
   url: AudioBubbleContent['url']
-  onTransitionEnd: () => void
+  onTransitionEnd: (offsetTop?: number) => void
 }
 
 const showAnimationDuration = 400
@@ -13,13 +13,14 @@ const typingDuration = 500
 let typingTimeout: NodeJS.Timeout
 
 export const AudioBubble = (props: Props) => {
+  let ref: HTMLDivElement | undefined
   const [isTyping, setIsTyping] = createSignal(true)
 
   onMount(() => {
     typingTimeout = setTimeout(() => {
       setIsTyping(false)
       setTimeout(() => {
-        props.onTransitionEnd()
+        props.onTransitionEnd(ref?.offsetTop)
       }, showAnimationDuration)
     }, typingDuration)
   })
@@ -29,7 +30,7 @@ export const AudioBubble = (props: Props) => {
   })
 
   return (
-    <div class="flex flex-col animate-fade-in">
+    <div class="flex flex-col animate-fade-in" ref={ref}>
       <div class="flex w-full items-center">
         <div class={'flex relative z-10 items-start typebot-host-bubble'}>
           <div

packages/embeds/js/src/features/blocks/bubbles/embed/components/EmbedBubble.tsx

@@ -4,21 +4,22 @@ import { createSignal, onCleanup, onMount } from 'solid-js'
 
 type Props = {
   content: EmbedBubbleContent
-  onTransitionEnd: () => void
+  onTransitionEnd: (offsetTop?: number) => void
 }
 
 let typingTimeout: NodeJS.Timeout
 
 export const showAnimationDuration = 400
 
 export const EmbedBubble = (props: Props) => {
+  let ref: HTMLDivElement | undefined
   const [isTyping, setIsTyping] = createSignal(true)
 
   onMount(() => {
     typingTimeout = setTimeout(() => {
       setIsTyping(false)
       setTimeout(() => {
-        props.onTransitionEnd()
+        props.onTransitionEnd(ref?.offsetTop)
       }, showAnimationDuration)
     }, 2000)
   })
@@ -28,7 +29,7 @@ export const EmbedBubble = (props: Props) => {
   })
 
   return (
-    <div class="flex flex-col w-full animate-fade-in">
+    <div class="flex flex-col w-full animate-fade-in" ref={ref}>
       <div class="flex w-full items-center">
         <div
           class={'flex relative z-10 items-start typebot-host-bubble w-full'}

packages/embeds/js/src/features/blocks/bubbles/image/components/ImageBubble.tsx

@@ -4,7 +4,7 @@ import { createSignal, onCleanup, onMount } from 'solid-js'
 
 type Props = {
   content: ImageBubbleContent
-  onTransitionEnd: () => void
+  onTransitionEnd: (offsetTop?: number) => void
 }
 
 export const showAnimationDuration = 400
@@ -14,14 +14,15 @@ export const mediaLoadingFallbackTimeout = 5000
 let typingTimeout: NodeJS.Timeout
 
 export const ImageBubble = (props: Props) => {
+  let ref: HTMLDivElement | undefined
   let image: HTMLImageElement | undefined
   const [isTyping, setIsTyping] = createSignal(true)
 
   const onTypingEnd = () => {
     if (!isTyping()) return
     setIsTyping(false)
     setTimeout(() => {
-      props.onTransitionEnd()
+      props.onTransitionEnd(ref?.offsetTop)
     }, showAnimationDuration)
   }
 
@@ -56,7 +57,7 @@ export const ImageBubble = (props: Props) => {
   )
 
   return (
-    <div class="flex flex-col animate-fade-in">
+    <div class="flex flex-col animate-fade-in" ref={ref}>
       <div class="flex w-full items-center">
         <div class={'flex relative z-10 items-start typebot-host-bubble'}>
           <div

packages/embeds/js/src/features/blocks/bubbles/textBubble/components/TextBubble.tsx

@@ -8,7 +8,7 @@ import { computePlainText } from '../helpers/convertRichTextToPlainText'
 type Props = {
   content: TextBubbleContent
   typingEmulation: TypingEmulation
-  onTransitionEnd: () => void
+  onTransitionEnd: (offsetTop?: number) => void
 }
 
 export const showAnimationDuration = 400
@@ -22,13 +22,14 @@ const defaultTypingEmulation = {
 let typingTimeout: NodeJS.Timeout
 
 export const TextBubble = (props: Props) => {
+  let ref: HTMLDivElement | undefined
   const [isTyping, setIsTyping] = createSignal(true)
 
   const onTypingEnd = () => {
     if (!isTyping()) return
     setIsTyping(false)
     setTimeout(() => {
-      props.onTransitionEnd()
+      props.onTransitionEnd(ref?.offsetTop)
     }, showAnimationDuration)
   }
 
@@ -50,7 +51,7 @@ export const TextBubble = (props: Props) => {
   })
 
   return (
-    <div class="flex flex-col animate-fade-in">
+    <div class="flex flex-col animate-fade-in" ref={ref}>
       <div class="flex w-full items-center">
         <div class="flex relative items-start typebot-host-bubble">
           <div

packages/embeds/js/src/features/blocks/bubbles/video/components/VideoBubble.tsx

@@ -5,21 +5,22 @@ import { createSignal, Match, onCleanup, onMount, Switch } from 'solid-js'
 
 type Props = {
   content: VideoBubbleContent
-  onTransitionEnd: () => void
+  onTransitionEnd: (offsetTop?: number) => void
 }
 
 export const showAnimationDuration = 400
 
 let typingTimeout: NodeJS.Timeout
 
 export const VideoBubble = (props: Props) => {
+  let ref: HTMLDivElement | undefined
   const [isTyping, setIsTyping] = createSignal(true)
 
   const onTypingEnd = () => {
     if (!isTyping()) return
     setIsTyping(false)
     setTimeout(() => {
-      props.onTransitionEnd()
+      props.onTransitionEnd(ref?.offsetTop)
     }, showAnimationDuration)
   }
 
@@ -32,7 +33,7 @@ export const VideoBubble = (props: Props) => {
   })
 
   return (
-    <div class="flex flex-col animate-fade-in">
+    <div class="flex flex-col animate-fade-in" ref={ref}>
       <div class="flex w-full items-center">
         <div class={'flex relative z-10 items-start typebot-host-bubble'}>
           <div

packages/embeds/react/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@typebot.io/react",
-  "version": "0.0.48",
+  "version": "0.0.49",
   "description": "React library to display typebots on your website",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",