No need to specify `height` prop

[7dp]

Is your feature request related to a problem? Please describe. I'm always frustrated when this lib requires the height prop. The problem is i can't determine the height of my items. Slightly dynamic, maybe 2 px or 5 px difference between items.

Describe the solution you'd like Just like snap-carousel, no need to specify height prop. The lib will handle it automagically.

Describe alternatives you've considered For now i just rollback to my previous implementation using snap-carousel.

Additional context I hope this very nice lib can handle that in the near future. Thank you so much 🐐. 🙏🔥

[dosubot[bot]]

Hey @7dp! 👋 I'm here to help you with any bugs, questions, or contributions you have for the library. Let's squash those bugs together!

The react-native-reanimated-carousel currently requires the height prop, especially for vertical carousels, to avoid errors. If the height prop is omitted in vertical mode, an error will be thrown ^[1].

However, you can achieve dynamic height adjustments by using custom animations. Implement a callback function of type TAnimationStyle and pass it to the customAnimation property of the Carousel. This allows you to manipulate the height of items dynamically based on their position ^[2].

Here's an example:

const animationStyle: TAnimationStyle = React.useCallback((value: number) => {
    'worklet';

    const height = interpolate(value, [-1, 0, 1], [100, 200, 100]); // Adjust heights dynamically

    return {
        height,
    };
}, []);

<Carousel
    style={{ width: screen.width, height: 240 }}
    width={screen.width}
    data={[...new Array(6).keys()]}
    customAnimation={animationStyle}
    renderItem={({ index, animationValue }) => {
        return (
            <CustomItem
                key={index}
                index={index}
                animationValue={animationValue}
            />
        );
    }}
/>;

const CustomItem = ({ index, animationValue }) => {
    const maskStyle = useAnimatedStyle(() => {
        const backgroundColor = interpolateColor(
            animationValue.value,
            [-1, 0, 1],
            ['#000000dd', 'transparent', '#000000dd']
        );

        return {
            backgroundColor,
        };
    }, [animationValue]);

    return (
        <View style={{ flex: 1 }}>
            <SBItem key={index} index={index} style={{ borderRadius: 0 }} />
            <Animated.View
                pointerEvents="none"
                style={[
                    {
                        position: 'absolute',
                        top: 0,
                        left: 0,
                        right: 0,
                        bottom: 0,
                    },
                    maskStyle,
                ]}
            />
        </View>
    );
};

This approach allows for dynamic height adjustments without explicitly setting the height prop for each item.

To continue talking to Dosu, mention @dosu.

[7dp]

My use case is horizontal carousel. Thus, i'm not able to tell explicitly which item that has more/less height than the others. What i want is just like the snap-carousel did.

[jony89]

If I set fixed height, and users has different font size and different display size, the content can get overflow the height of the carousel.

This is forcing me to add ScrollView in each render item, or unneeded extra height, eventually I get two scrolls one for the rendered item and one of the page it self which obviously is not the expected result.

[jony89]

@dohooo any thoughts regard what I wrote? it's impossible to use the carousel for large amount of content - more than one screen of data - without fixing it.

Any ideas how to address it?

[nareshkopanathi]

Hi @dohooo, Since the library currently doesn't provide a built-in method to automatically adjust the carousel height based on its content, I wanted to ask if there are any future plans to support this feature?

It would be helpful to have an option where the carousel height dynamically adapts to the content inside each item without requiring manual calculations, as manually adjusting the height often leads to performance issues and unnecessary re-renders.

Looking forward to your thoughts on this!

[trickeyd]

I'm struggling with this too. In my case, simply taking the height of the largest item would make sense.

[trickeyd]

I created a quick patch earlier to turn this functionality on and off with a prop: calculatePerpendicular (and the orthogonal dimension prop omitted). I thought I'd put it here incase anyone finds it useful.

WARNING: It is not well tested, and I have only used it in vertical orientation. The size change does not animate, it jumps.

This works for my purposes, so not going to refine the code any further, sorry if it is a bit messy. Though the changes seem to be loosely along the route the maintainer was thinking of going down though.

diff --git a/node_modules/react-native-reanimated-carousel/lib/typescript/types.d.ts b/node_modules/react-native-reanimated-carousel/lib/typescript/types.d.ts
index a47fac7..842d52a 100644
--- a/node_modules/react-native-reanimated-carousel/lib/typescript/types.d.ts
+++ b/node_modules/react-native-reanimated-carousel/lib/typescript/types.d.ts
@@ -213,6 +213,10 @@ export type TCarouselProps<T = any> = {
      * @deprecated please use snapEnabled instead
      */
     enableSnap?: boolean;
+    /**
+     * If true, the carousel will calculate the perpendicular dimension of the items.
+     */
+    calculatePerpendicular?: boolean;
 } & (TParallaxModeProps | TStackModeProps);
 export interface ICarouselInstance {
     /**
diff --git a/node_modules/react-native-reanimated-carousel/src/components/CarouselLayout.tsx b/node_modules/react-native-reanimated-carousel/src/components/CarouselLayout.tsx
index e061e24..97af7ae 100644
--- a/node_modules/react-native-reanimated-carousel/src/components/CarouselLayout.tsx
+++ b/node_modules/react-native-reanimated-carousel/src/components/CarouselLayout.tsx
@@ -1,7 +1,7 @@
 import React from "react";
 import { StyleSheet, type ViewStyle } from "react-native";
 import { GestureHandlerRootView } from "react-native-gesture-handler";
-import { runOnJS, useAnimatedStyle, useDerivedValue } from "react-native-reanimated";
+import { runOnJS, useAnimatedStyle, useDerivedValue, useSharedValue } from "react-native-reanimated";
 import { useAutoPlay } from "../hooks/useAutoPlay";
 import { useCarouselController } from "../hooks/useCarouselController";
 import { useCommonVariables } from "../hooks/useCommonVariables";
@@ -31,7 +31,6 @@ export const CarouselLayout = React.forwardRef<ICarouselInstance>((_props, ref)
     rawDataLength,
     mode,
     style,
-    containerStyle,
     width,
     height,
     vertical,
@@ -49,6 +48,7 @@ export const CarouselLayout = React.forwardRef<ICarouselInstance>((_props, ref)
     onProgressChange,
     customAnimation,
     defaultIndex,
+    calculatePerpendicular,
   } = props;
 
   const commonVariables = useCommonVariables(props);
@@ -90,9 +90,11 @@ export const CarouselLayout = React.forwardRef<ICarouselInstance>((_props, ref)
 
   const {
     getSharedIndex,
+    index, // Animated index. Could be used for dynamic dimension
     // index, // Animated index. Could be used for dynamic dimension
   } = carouselController;
 
+
   const _onScrollEnd = React.useCallback(() => {
     const _sharedIndex = Math.round(getSharedIndex());
 
@@ -104,7 +106,7 @@ export const CarouselLayout = React.forwardRef<ICarouselInstance>((_props, ref)
     });
 
     if (onSnapToItem) onSnapToItem(realIndex);
-
+1
     if (onScrollEnd) onScrollEnd(realIndex);
   }, [loop, autoFillData, rawDataLength, getSharedIndex, onSnapToItem, onScrollEnd]);
 
@@ -125,32 +127,32 @@ export const CarouselLayout = React.forwardRef<ICarouselInstance>((_props, ref)
     _onScrollEnd();
   }, [_onScrollEnd, startAutoPlay]);
 
+  const [itemsLayout, setItemsLayout] = React.useState<{height: number, width: number}>({height: 0, width: 0});
+  const onItemsLayout = React.useCallback(({height, width}: {height: number, width: number}) => {
+    setItemsLayout({height, width});
+  }, [itemsLayout]);
+
   const scrollViewGestureOnTouchBegin = React.useCallback(pauseAutoPlay, [pauseAutoPlay]);
 
   const scrollViewGestureOnTouchEnd = React.useCallback(startAutoPlay, [startAutoPlay]);
 
   const layoutStyle = useAnimatedStyle(() => {
-    // const dimension = itemDimensions.value[index.value];
-
-    // if (!dimension) {
-    //   return {};
-    // }
+    const dimension = itemDimensions.value[index.value];
     return {
-      // height: dimension.height, // For dynamic dimension in the future
-
-      width: width || "100%", // [width is deprecated]
-      height: height || "100%", // [height is deprecated]
+      width: width || calculatePerpendicular && dimension?.width || "100%", // [width is deprecated]
+      height: height || calculatePerpendicular && dimension?.height || "100%", // [height is deprecated]
     };
-  }, [width, height, size, itemDimensions]);
+  }, [width, height, size, calculatePerpendicular, itemsLayout]);
+  
 
   return (
-    <GestureHandlerRootView style={[styles.layoutContainer, containerStyle]}>
+    <GestureHandlerRootView style={[styles.layoutContainer]}>
       <ScrollViewGesture
         size={size}
         key={mode}
         translation={handlerOffset}
         style={[
-          styles.contentContainer, // [deprecated]
+          styles.contentContainer,
           layoutStyle,
           style,
           vertical ? styles.itemsVertical : styles.itemsHorizontal,
diff --git a/node_modules/react-native-reanimated-carousel/src/components/ItemLayout.tsx b/node_modules/react-native-reanimated-carousel/src/components/ItemLayout.tsx
index 0ba8321..1234df9 100644
--- a/node_modules/react-native-reanimated-carousel/src/components/ItemLayout.tsx
+++ b/node_modules/react-native-reanimated-carousel/src/components/ItemLayout.tsx
@@ -1,5 +1,5 @@
 import React from "react";
-import type { ViewStyle } from "react-native";
+import type { LayoutChangeEvent, ViewStyle } from "react-native";
 import type { SharedValue } from "react-native-reanimated";
 import Animated, { useAnimatedStyle, useDerivedValue } from "react-native-reanimated";
 
@@ -20,13 +20,12 @@ export const ItemLayout: React.FC<{
   children: (ctx: {
     animationValue: Animated.SharedValue<number>;
   }) => React.ReactElement;
+  onLayoutItem: (index: number, dimensions: { width: number, height: number }) => void;
 }> = (props) => {
-  const { handlerOffset, index, children, visibleRanges, animationStyle } = props;
+  const { handlerOffset, index, children, visibleRanges, animationStyle, onLayoutItem } = props;
 
   const {
     props: { loop, dataLength, width, height, vertical, customConfig, mode, modeConfig },
-    // TODO: For dynamic dimension in the future
-    // layout: { updateItemDimensions },
   } = useGlobalState();
 
   const size = vertical ? height : width;
@@ -61,18 +60,19 @@ export const ItemLayout: React.FC<{
     [animationStyle, index, x, size]
   );
 
-  // TODO: For dynamic dimension in the future
-  // function handleLayout(e: LayoutChangeEvent) {
-  //   const { width, height } = e.nativeEvent.layout;
-  //   updateItemDimensions(index, { width, height });
-  // }
+   const onLayout = React.useCallback((e: LayoutChangeEvent) => {
+     const { width, height } = e.nativeEvent.layout;
+     onLayoutItem(index, { width, height });
+  }, [onLayoutItem, index]);
+
 
   return (
     <Animated.View
+      onLayout={onLayout}
       style={[
         {
-          width: width || "100%",
-          height: height || "100%",
+          width: mode === "horizontal-stack" ? undefined : width || '100%',
+          height: mode === "horizontal-stack" ? height || "100%" : undefined,
           position: "absolute",
           pointerEvents: "box-none",
         },
diff --git a/node_modules/react-native-reanimated-carousel/src/components/ItemRenderer.tsx b/node_modules/react-native-reanimated-carousel/src/components/ItemRenderer.tsx
index deee0c1..cf6c5f0 100644
--- a/node_modules/react-native-reanimated-carousel/src/components/ItemRenderer.tsx
+++ b/node_modules/react-native-reanimated-carousel/src/components/ItemRenderer.tsx
@@ -1,6 +1,6 @@
 import React from "react";
 import type { FC } from "react";
-import type { ViewStyle } from "react-native";
+import type { LayoutChangeEvent, ViewStyle } from "react-native";
 import type { SharedValue } from "react-native-reanimated";
 import { runOnJS, useAnimatedReaction } from "react-native-reanimated";
 
@@ -11,7 +11,8 @@ import type { VisibleRanges } from "../hooks/useVisibleRanges";
 import { useVisibleRanges } from "../hooks/useVisibleRanges";
 import type { CarouselRenderItem } from "../types";
 import { computedRealIndexWithAutoFillData } from "../utils/computed-with-auto-fill-data";
-
+import { View } from "react-native";
+import { useGlobalState } from "../store";
 interface Props {
   data: any[];
   dataLength: number;
@@ -51,7 +52,10 @@ export const ItemRenderer: FC<Props> = (props) => {
     loop,
   });
 
+  const {layout : {updateItemDimensions}} = useGlobalState();
+
   const [displayedItems, setDisplayedItems] = React.useState<VisibleRanges>(null!);
+  const [itemDimensions, setItemDimensions] = React.useState<Record<number, {width: number, height: number}>>({});
 
   useAnimatedReaction(
     () => visibleRanges.value,
@@ -59,6 +63,14 @@ export const ItemRenderer: FC<Props> = (props) => {
     [visibleRanges]
   );
 
+  const onLayoutItem = React.useCallback((index: number, dimensions: { width: number, height: number }) => {
+   setItemDimensions(prev => ({...prev, [index.toString()]: dimensions}))
+}, []);
+
+React.useEffect(() => {
+  itemDimensions && updateItemDimensions(itemDimensions)
+}, [itemDimensions]);
+  
   if (!displayedItems) return null;
 
   return (
@@ -80,21 +92,24 @@ export const ItemRenderer: FC<Props> = (props) => {
         if (!shouldRender) return null;
 
         return (
+
           <ItemLayout
             key={index}
             index={index}
             handlerOffset={offsetX}
             visibleRanges={visibleRanges}
             animationStyle={customAnimation || layoutConfig}
+            onLayoutItem={onLayoutItem}
           >
-            {({ animationValue }) =>
-              renderItem({
-                item,
-                index: realIndex,
-                animationValue,
-              })
-            }
+              {({ animationValue }) =>
+                renderItem({
+                  item,
+                  index: realIndex,
+                  animationValue,
+                })
+              }
           </ItemLayout>
+
         );
       })}
     </>
diff --git a/node_modules/react-native-reanimated-carousel/src/hooks/useInitProps.ts b/node_modules/react-native-reanimated-carousel/src/hooks/useInitProps.ts
index c9da37b..2373d11 100644
--- a/node_modules/react-native-reanimated-carousel/src/hooks/useInitProps.ts
+++ b/node_modules/react-native-reanimated-carousel/src/hooks/useInitProps.ts
@@ -37,6 +37,7 @@ export function useInitProps<T>(props: TCarouselProps<T>): TInitializeCarouselPr
     snapEnabled = props.enableSnap ?? true,
     width: _width,
     height: _height,
+    calculatePerpendicular = false,
   } = props;
 
   const width = Math.round(_width || 0);
@@ -83,5 +84,6 @@ export function useInitProps<T>(props: TCarouselProps<T>): TInitializeCarouselPr
     overscrollEnabled,
     width,
     height,
+    calculatePerpendicular,
   };
 }
diff --git a/node_modules/react-native-reanimated-carousel/src/store/index.tsx b/node_modules/react-native-reanimated-carousel/src/store/index.tsx
index 7cb97cd..0b25891 100644
--- a/node_modules/react-native-reanimated-carousel/src/store/index.tsx
+++ b/node_modules/react-native-reanimated-carousel/src/store/index.tsx
@@ -15,7 +15,7 @@ export interface IContext {
     containerSize: SharedValue<{ width: number; height: number }>;
     updateContainerSize: (dimensions: { width: number; height: number }) => void;
     itemDimensions: SharedValue<ItemDimensions>;
-    updateItemDimensions: (index: number, dimensions: { width: number; height: number }) => void;
+    updateItemDimensions: (dimensions: Record<number, { width: number; height: number }>) => void;
   };
 }
 
@@ -30,11 +30,12 @@ export const GlobalStateProvider = ({
 }) => {
   const containerSize = useSharedValue<{ width: number; height: number }>({ width: 0, height: 0 });
   const itemDimensions = useSharedValue<ItemDimensions>({});
+  const dimensionsCache = {}
   
-  const updateItemDimensions = (index: number, dimensions: { width: number; height: number }) => {
+  const updateItemDimensions =  (dimensions: Record<number, { width: number; height: number }>) => {
     "worklet";
 
-    itemDimensions.value = { ...itemDimensions.value, [index]: dimensions };
+    itemDimensions.value = dimensions
   };
 
   const updateContainerSize = (dimensions: { width: number; height: number }) => {
diff --git a/node_modules/react-native-reanimated-carousel/src/types.ts b/node_modules/react-native-reanimated-carousel/src/types.ts
index c3e938c..bc5cdf6 100644
--- a/node_modules/react-native-reanimated-carousel/src/types.ts
+++ b/node_modules/react-native-reanimated-carousel/src/types.ts
@@ -117,10 +117,7 @@ export type TCarouselProps<T = any> = {
    * Carousel content style
    */
   style?: StyleProp<ViewStyle>;
-  /**
-   * Carousel container style
-   */
-  containerStyle?: StyleProp<ViewStyle>;
+
   /**
    * PanGesture config
    * @test_coverage ✅ tested in Carousel.test.tsx > should call the onConfigurePanGesture callback
@@ -229,6 +226,8 @@ export type TCarouselProps<T = any> = {
    * @deprecated please use snapEnabled instead
    */
   enableSnap?: boolean;
+
+  calculatePerpendicular?: boolean;
 } & (TParallaxModeProps | TStackModeProps);
 
 export interface ICarouselInstance {

[trickeyd]

PS @dohooo

Quick updates to the shared value are async (even in brigeless mode) so updating the item dimensions one by one in quick succession caused them to overwrite each other. So I was forced to maintain the Record in the ItemRenderer and update the whole thing each time.

[AlixH]

Up ! I also cannot manage to achieve dynamic height based on the carousel content

[trickeyd]

@AlixH - did you give the patch a go? That is my use case too, so it should work for you until an official fix is added (hopefully).

[AlixH]

I don't want to use a patch for now, and I did not manage it with react-native-pager-view either. So I went with Flatlist with horizontal and pagingEnabled, does the trick

[7dp]

😭😭 yoo this package is only one step away from being a perfection ✨.

[Tobi696]

I don't want to use a patch for now, and I did not manage it with react-native-pager-view either. So I went with Flatlist with horizontal and pagingEnabled, does the trick

Please share a code example 🙏

[dosubot[bot]]

Hi, @7dp. I'm Dosu, and I'm helping the react-native-reanimated-carousel team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• You requested the removal of the height prop requirement for dynamic height items.
• The maintainer explained the necessity of the height prop, suggesting custom animations as a workaround.
• Multiple users reacted negatively to the current solution, sharing workarounds like using ScrollView or custom patches.
• Other users inquired about future support for automatic height adjustment or opted for different libraries.

Next Steps:

• Please let me know if this issue is still relevant with the latest version of the library by commenting here.
• If there is no further activity, this issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!

[jony89]

issue still relevant and should get high priority

[tobenna-wes-re]

issue still relevant and should get high priority

[UnderTheMoonspell]

Another person to the mix! Besides that the lib works very well

[matt4tch]

Will this be fixed? I currently have the Carousel from this library integrated into an app I'm developing. This is the only bug I'm currently facing and I've been at it for hours trying to find an alternative solution. I'm thinking of switching to another library. If you could tell me, @dohooo, whether or not this issue is on the list of priorities/when you expect to begin work on it, that would be incredibly helpful. Thank you so much!

[dohooo]

Auto width/height calculation is now available in v5.0.0-beta.0!(Breaking changes included)

Simply remove width/height props and the carousel will automatically measure container dimensions. Install with npm install react-native-reanimated-carousel@beta (requires Reanimated v4 + react-native-worklets or upgrade to Expo 54).

Please test the beta and share feedback here to help accelerate the stable release! 🚀

[jony89]

Great news!

[7dp]

Damn. Eager to test this soon. thx Caspian!

[markwitt1]

I get a white screen when i remove static width / height

[astrahov]

Auto width/height calculation is now available....

// Warning: [react-native-reanimated-carousel] Horizontal mode did not specify `width`, will fall back to automatic measurement mode.

<View style={{ flex: 1, padding: 16 }}>
    <Carousel
        data={...}
        ref={...}
        renderItem={...}
    />
</View>

// No Warning

<View style={{ flex: 1, padding: 16 }}>
    <Carousel
        data={...}
        ref={...}
        renderItem={...}
        width={windowWidth - 16 * 2}
    />
</View>

Enviroment:

• "react-native": "0.81.4",
• "react-native-reanimated": "4.1.0",
• "react-native-reanimated-carousel": "5.0.0-beta.0",
• "react-native-worklets": "0.5.1",

[zhouhao27]

Doesn't work for me. The carousel is not shown at all if I remove height and width properties. Here is my code:

 const renderBanner = async () => {
    return (
      <View style={{ flex: 1, padding: 16 }}>
        <Carousel
          // width={CAROUSEL_WIDTH}
          data={banners}            
          // height={80}
          ref={ref}
          renderItem={renderBannerItem}
        />
      </View>);
  };

My package.json:

"react-native": "0.79.3",
"react-native-reanimated": "4.1.0",
"react-native-reanimated-carousel": "5.0.0-beta.0",
"react-native-worklets": "0.5.1",

[dohooo]

Hi! This feature has been implemented in v5.x (beta).

Starting from v5, you can now use flex-based sizing without explicit width/height props:

<View style={{ flex: 1 }}>
  <Carousel
    style={{ flex: 1 }}
    data={data}
    renderItem={renderItem}
  />
</View>

Or with explicit dimensions via the style prop:

<Carousel
  style={{ width: 300, height: 200 }}
  data={data}
  renderItem={renderItem}
/>

For a complete guide on all sizing options, please check the "Sizing Your Carousel" section in our documentation: https://rn-carousel.dev/usage#sizing-your-carousel

The fix is available in the latest beta release. Please upgrade it to try it out!

If you still have any questions related to this feature, feel free to open a new issue!