Flatlist scrolltoindex not working

More complex, selectable example below. We have board id and comments id in notice model. Attempts to access this ref will fail. It only renders the items that are visible on the screen and only updates the items that have changed to prevent the app performance from getting worse when the number of items in the list gets too large. refs. import { Animated, Dimensions, RefreshControl, StyleSheet, View, TouchableOpacity } from 'react-native'. ref={flatRef} showsHorizontalScrollIndicator={false} horizontal. Oct 24, 2018 · 5. FlatList now ships a lot of features: ScrolltoIndex not working react-native on a flatlist. Thanks in advance. Here's the relevant part of my code: ref={flatListRef} data={images} getItemLayout={getItemLayout} // Assuming getItemLayout is correctly implemented. listRef. Despite the scrollToIndex state in <App /> being updated, which feeds down to the <List /> 's scrollToIndex prop, the list is not navigated to the desired list element as expected. answered Oct 29, 2020 at 5:19. Without setting this prop, FlatList Jul 24, 2018 · [FlatList] render issues using scrollToIndex on componentDidMount facebook/react-native#13202 VirtualizedList + getItemLayout only renders initialNumToRender items facebook/react-native#15734 [Android][SectionList/FlatList] scrollTo not working because offset is outside rendered "canvas" facebook/react-native#16676 Your flatListRef is a ref to a FlatList instance. In this article, we’ll take a deep dive into the FlatList component and explore how to use it. ref={this. Feb 13, 2019 · Use the initialScrollIndex prop of the FlatList component to order the index where you want to start the FlatList. state. add reference to flatlist: ` ref={ref => { this. expo. But after loading the screen when do component re-rendering it is working. Jan 7, 2023 · The FlatList component displays the similarly structured data in a scrollable list. – Oct 29, 2020 · Case 1: scrollToIndex with Fixed Item Size. B. export default class App extends Component {. If you want to make display elements in React Native displayed in horizontal list the simplest way possible, you only need the Flex Direction as Row: myElement: { display: 'flex', flexDirection: 'row', }, ScrolltoIndex not working react-native on a flatlist. scrollToIndex({. Then, I give it a big list of data 80 items, and calling to scrollToIndex(index: 35) Throwing an exception as the image. scrollTo, which is apparently not defined when the SectionList is nested in a ScrollView or other scrollable component like FlatList. 2. import React, { useEffect, useState, useRef, useCallback } from 'react'; //React class declaration. You switched accounts on another tab or window. Dec 3, 2020 · FlatList scrollToIndex() not working proper when data is large, it's missing position in React-Native Version 0. When I try to scroll, list bounces to the top. Feb 5, 2017 · However, when working with an Animated component, we're moving into direct manipulation which requires us to get the native node of the component before calling any static methods. ref={(ref) => { ref?. keyExtractor tells the list to use the id s for the react keys instead of the default key property. However when I try to go back on a previous item the selection occurs but there is no scroll. scrollToIndex({animated: true, index: 50} Expected Results. As example: Apr 1, 2019 · Looks like FlatList's scrollToIndex changes the way it views index if numColumns is higher then 1. I'm having one view with an image on top on of a page and my list is below. You signed out in another tab or window. scrollToIndex({animated: true, index: (this. When choosing the penultimate to the second and so on. Basically, you need a pure component to make this work. I also have a pull to refresh enabled (using RefreshControl) in Flatlist. Home 🔥 Popular Abstract: In this article, we will discuss a common issue faced while using the FlatList component in React Native for building an image gallery app. getItemLayout={(data Oct 3, 2017 · Nested FlatList not scrolling / ScrollToIndex on FlatList not working. But the scroll animation is faster than what i need is there anyway to increase the scroll animation duration? This is the code for scrollup (up swipe gesture) function. Nov 9, 2018 · You could use "ListFooterComponent". I want the app to scroll through the list by its Jan 10, 2020 · console. If the no of items are greater or equal to 3 than it is working exactly fine. ref = "flatList". Oct 29, 2020 · This question is similar to these ones and maybe you can reference some of the answers and see what works for your case. props. Jul 21, 2020 · My project actually has two flatlists and I want the scroll to dynamically move based on what is selected. You would need the data before the FlatList is mounted as the initialScrollIndex will be processed as soon as possible. i h Clone the repro here. I have a React Native Snap Carousel list that should be scrolling another list on snap. BTW scrollToOffset({ offset: 0 }) also does not work unfortunately. data={list} disableVisualisation="false". 1 #30524 Closed artoon opened this issue Dec 3, 2020 · 2 comments Jan 20, 2020 · NestedScrollView is just like ScrollView, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android. Mar 1, 2024 · What I would do instead. ScrollToIndex does not scroll the FlatList as expected. Apr 28, 2020 · ScrolltoIndex not working react-native on a flatlist. May 20, 2018 · 2. Since it inherits from ScrollView the best way here is to call scrollToEnd() in onContentSizeChange like so : <FlatList ref = "flatList" onContentSizeChange={()=> this. Then we scroll to the comments to show user. I'd like to understand the reason for this warning/error: 'Property 'scrollToIndex' does not exist on type 'FlatList<School>'. Jun 2, 2019 · What I expect to be is a alphabet list view. const scrollUp = () => {. length my if statement would setCurrentIndex back to 0 but it doesn't seem to work. Low Feb 18, 2020 · And I have also tried this. It should go to the index and stay there. But the method is not working as expected and is scrolling to wrong position. You could you use the Modal component to create a component that will overlap your screen while visible=true, and inside such modal you could render a normal FlatList (imported from react-native ). 1. I found a better solution,scrollToEnd() is not working because it is triggered before the change is made to the FlatList. The current code works for the first two iterations but then it does not seem to reset properly and I get the scrollToIndex out of range error: index is 2 but maximum is 1. <FlatList. io/I9cYUYxJi Environment (include versions). this. Ask Question Asked 6 years, 7 months ago. I don't understand why the FlatList does not update the length of the data it renders, so i can scroll to it. let isGesture = useRef(true). I checked and the function scrollToIndex is calling. Dec 1, 2023 · my component has one big Horizontal FlatList it has 2 Index Page (data) and each Page (data) When content goes out of bounds, it should scroll vertically. You need to check your condition and add validation for index value. Also, for so many rows, you could also add a TextInput to that Modal, where the user could filter the results based on some Description. Jun 6, 2018 · Well in my case I have to do this to make scrolltoindex work properly, 1. Using scrollToIndex doesn't work properly, native keep showing errors due to lack of getItemLayout, and here is another problem with setting this function - every item can have different size. keyExtractor={this. By passing extraData={selected} to FlatList we make sure FlatList itself will re-render when the state changes. I also want to let the user scroll the list by themselves and temporarily disable the automatic scroll when this happens. Related questions. Snack, code example, screenshot, or link to a repository: minimal snack example This issue is purely about trying to use scrollToIndex on initial mount not working, I believe based on the onScroll handler not reporting correct values (console. May 15, 2024 · We will explore why the scrollToIndex function does not work in vertical orientation and propose a workaround. scrollToEnd()} /> Oct 30, 2020 · In this video, I show you how to use the scrollToIndex function to scroll to a row with a certain index in a ReactNative FlatList. _scrollRef. I tested with similar code. I was using typescript and did a wrong typing in the ref definition. 3: if you want to have a fixed size FlatList put it's height inside style property not contentContainerStyle. Old code: const flatListRef = useRef(FlatList); Changed into this and solved the issue: const flatListRef = useRef<FlatList>(null); edited Feb 17, 2023 at 5:01. 3 React Native FlatList scrollToIndex() is not working when screen loaded for the first time. 27. Any idea? this. renderDetailsItem} Nov 8, 2022 · when you write the following: data={displayPinnedCards && displayPinnedCards} it means if displayPinnedCards is true (contains information), it will return an array, but if it is undefined or null or false, it will return undefined. Apr 8, 2021 · Also i had not found examples where items where added or removed from FlatLists in conjunction with the scrollToIndex usage. : The problem is not that it is not scrolling to there, it is scrolling to the exact index with the existing code initially, then after one second it is Jul 28, 2022 · So basically you need to access scrollIndex like this. 28. Nov 21, 2017 · FlatList does not have what you need. When I checked the documentation, I can see a method called scrollToEnd(). Any suggestions are Jan 26, 2021 · The current code works for the first two iterations but then it does not seem to reset properly and I get the scrollToIndex out of range error: index is 2 but maximum is 1. 0. flatListRef = ref; }} ` 2. Apr 23, 2024 · im currently learning how to develop apps with react-native, im using expo as a way to deploy my app to my iPhone to check it out. then call function again inside flatlist I have a flatList with a ref,when i call scrollToOffSet it doesnt work properly,it moves to the first item of the flatList ,what ever the value is… Jan 30, 2019 · I have a FlatList that automatically scrolls item by item based on a time series using the scrollToIndex function. scrollToIndex({animated: true,index:0})} I tried using AppState as used in the Offical React Native document but AppState 's addEventListener handler Apr 24, 2021 · I have a flatlist with a bunch of item in it now when I press the button the flatlist scrolls down using ref and scrollToIndex method. index + 1}) Edit: To answer your comment, you should've asked directly for auto-scrolling, however, The code below should work! const flatListRef = useRef(null) let index=0; Jan 26, 2021 · There’s only two items in my array right now but there could be more. log onScroll to see what I mean, like my code example above). More complex, multi-select example demonstrating `` usage for perf optimization and avoiding bugs. My idea was to use the onScroll event to catch when the user scrolls the list and set a boolean flag. list. For this, you must calculate the month before the render in the componentDidMount or componentWillMount functions where you will have to store the month(or the index) in the state. React-Native: Ref is missing scrollToIndex() for FlatList. import React, { Component } from 'react'. //tried this, but don't know how to pass the actual index. Here is my code for Flatlist: <FlatList. Nov 4, 2020 · scrollToIndex should be used in conjunction with getItemLayout or onScrollToIndexFailed, otherwise there is no way to know the location of offscreen indices or handle failures. It can move to random index item But I want to move certain item doing switch screen. Since it inherits from ScrollView the best way here is to call scrollToEnd() in onContentSizeChange like so : <FlatList. Running into an inconsistent bug when trying to use scrollToIndex on componentDidMount. Flat List - ScrollToIndex should be used in Feb 7, 2019 · You can read the answer here [ How do I make a list (FlatList) automatically scroll through the elements using Animated? scrollToIndex = (index, animated) => { this. flatList = null; componentDidMount() {. But obviously not working. scrollToIndex({ animated: true, index: this. Expected Behaviour : Apr 22, 2024 · Using this approach instead of a flexWrap layout can prevent conflicts with the item height logic. it works well iOS simulator but not in Android what's the matter with this code? I gave nestedScrollEnabled={true} to both FlatList and ScrollView Using this approach instead of a flexWrap layout can prevent conflicts with the item height logic. In noticescreen, if we click notice , we need to move board that have that comments. React Native Maps FlatList scrollToIndex() not a function / undefined. React Native FlatList is a component that allows you to render lists with zero hassle and minimal code. Call scrollToIndex() with timeout: ` setTimeout(() => { this. scrollToIndex({index: 0}) }} Oct 11, 2018 · I created a custom List component from the react-native flatList component. Its a prop of the Flatlist and acts as the last component as the Flatlist. scrollToIndex({animated: true, index: flatListRef. Jan 23, 2020 · Load records into the FlatList; Check onLayout and onContentSizeChange events, which continue to fire for a long time. findIndex returns-1 if it does not find an element that matches the condition. Reload to refresh your session. I think using scrollToIndex requires getItemLayout to be implemented, which in my current case cant be done accurately due to varied item's size – Aug 19, 2019 · Thanks the doc could have been better, the scrollToIndex function puports a contract which is actually not exactly correct. Steps to Reproduce. N. Flat List - ScrollToIndex should be used in conjunction with getItemLayout or onScrollToIndexFailed 🔥 In this video tutorial you will learn about React Native scrollToIndex and how to scroll to an item inside a FlatList, ListView, ScrollView, SectionList e Jul 27, 2018 · 1. ) Memory consumption: How much information about your list is being stored in memory, which could lead to an app crash. Too use scrollToIndex, I need to set getItemLayout prop of the flatlist component. state = { selected: (new Map(): Map < string, boolean >) }; _keyExtractor Aug 22, 2023 · Implement scrollToIndex and scrollToIndexFailed, this is not the typical way of using scrollToIndex, and instead works with flatlist elements that have variable sizes, but it has worked for me before; Use "useEffect" to activate the "scrollToIndex" function; Describe what you expected to happen: I expected the flatlist to work normally and be FlatList answers are above, but it is not the only way to make horizontal list in RN. Scroll to particular Item in FlatList. This is where FlatList comes in to mitigate this problem. The problem occurs on a small list of 3 elements, I set the initialScrollIndex equal to the second or last element, the good item is selected. (Write your steps here:) Made a horizontal flatlist with initialScrollIndex. log fire (including the one that checks for the flatListref) but, when called the first time in componentDidMount no scrolling occurs, in May 26, 2017 · RN 0. Can not find a good solution for this. Actual Results. current; Check this ref's value in your onScroll function to determine what to do. onScrollToIndexFailed={onScrollToIndexFailed} // Retry Feb 8, 2018 · 1: don't put a fixed height for FlatList contentContainer. So that's what you'll want to use as your generic type parameter. And also tried scrollToOffset which does not work at all. Oct 29, 2021 · I'm using a react-native-flatslider for static images it's working fine but for images getting for apis is not work properly. flatListRef. scrollToIndex({ index, animated }) } componentDidMount() { // use componentDidMount instead since the WillMount is getting deprecated soon setInterval(function() { const { sliderIndex, maxSlider } = this Feb 7, 2020 · I have a FlatList of comments of different height and I need to implement scrolling to some specific element when opening the modal with this FlatList. Apr 10, 2022 · @BarryMichaelDoyle thanks,I really appreciate it! The weird thing is that I can't access the function scrollTo() or scrollToIndex() through ref for the flatlist which theoretically should work, the docs just provide a brief overview of the parameters you can use. May 23, 2023 · Furthermore, React is not rendering this list in a scrollable format. Aug 6, 2020 · 1. Jun 16, 2019 · ScrolltoIndex not working react-native on a flatlist. index: I18nManager. 0 Description FlatList uses scrollToIndex () to scroll to the last few elements, and the element leaves the bottom of the list. Responsiveness: Application ability to respond to interactions. pressedIndex }); }, 500); ` 3. But you can work around that by providing the initialScrollIndex as a function that returns the index FlatList needs. length my if statement would setCurrentIndex back Aug 9, 2023 · First load the screen, I give the data={images} with 5 items, 4 items, then 6 items, then it;s working fine. Essentially, if the index I’m scrolling to is outside of the initialNumToRender, it doesn’t get rendered until I start manually scrolling. A quick question tho, you are suggesting me to use scrollToIndex? Since onScrollToIndexFailed is called when failed to scroll to particular index. And when scrolling Mar 22, 2018 · 3. How to make this work? Sep 10, 2020 · What I want to do: When you click on a category displayed by FlatList the Scroll scrolls to the View that displays the products of this category, that is, if you click on Combo the page scrolls to the View that displays the products of the Combo category, if you click on Side Dishes the page scrolls until the View that displays the products in Aug 18, 2020 · In case this help anyone, I got into the same issue and did correctly import from 'react-native'. For this event works correctly, you should change the structure without ScrollView and it is possible for your code. That is, when choosing the latter to the first. 1. Any help will be appreciated Oct 13, 2022 · How to use ReactNative FlatList ScrolltoIndex properly? 12. Jan 5, 2021 · In flatlist scroll to offset is not working properly when the no of items are less than 3. Feb 6, 2019 · I've used Flatlist's scrollToIndex many times before but I'm developing a custom calendar and have ran into the following use case which breaks the method: Calendar has 2 modes: DAY SELECTION: Basically just a matrix of touchable days to select. Link - VirtualizedList: You have a large list that is slow to update. scrollToIndex({ index, animated: false }); In both the first mount (componentDidMount) and subsequent calls (componentDidUpdate) all the console. e 3). state = { selected: (new Map(): Map < string, boolean >) }; _keyExtractor Nov 19, 2019 · React Native FlatList scrollToIndex() is not working when screen loaded for the first time I have this category filter component in my react native application. 1 scrollToLocatoin is not a function : react-native-swipe-list-view FlatList ref scrollToIndex is not a Feb 7, 2019 · AppState can tell you if the app is in the foreground or background, and notify you when the state changes. Describe what you expected to happen: The FlatList should only render the number of items set in the initialNumToRender and onLayout and onContentSizeChange events should not fire once the initial records are loaded into the list. Wich means: NestedScrollView is when you need a scrollView inside another scrollView. 1 scrollToIndex out of range: item length 0 but minimum is 1 How to use ReactNative FlatList ScrolltoIndex properly? 12 ScrolltoIndex not working react-native on a flatlist. Build and start the app (I’ve been using recent version of Chrome) Enter a number between 0 and 999 in the number input at the top of the screen. scrollView}>. . Expect item 50 to appear at the top of the rendered FlatList. Below is a simplified example of what I have, just want an idea on how to make it work first. log('scrolling to ', index) this. but they needed flatlist reference which is not available while rendering first time. 7. keyExtractor} Oct 20, 2022 · React Native FlatList scrollToIndex() is not working when screen loaded for the first time. data={this. . [Source] Adapt the given example to your needs and scroll with this. ScrollView. YEAR SELECTION: A scrollable FlatList with years to select from. Warning: Stateless function components cannot be given refs. I have rendered items with the same alphabet as an item in the parent flatlist and rendered the items inside the children flatlists, so the item heights of the parent flatlist are varying. Therefore, you'd end up with the following: scrollView = React. data} renderItem={this. ScrolltoIndex not working react-native on a flatlist. comments. Sep 13, 2022 · ScrolltoIndex not working react-native on a flatlist. – rnk Jul 7, 2020 · For this i have used scrollToIndex method of FlatList in conjunction with getItemLayout prop of FlatList and passed the index of the current podcast item being played to the method. Leo Santos. In React Native, there’s a handy tool called FlatList. 44. Jan 13, 2020 · 3. 2: childs inside Flatlist must not have a height of percentage eg: 50% otherwise it take the half of list and don't let other childs to render. If you don't use arrow function, the FlatList cannot access the "this" in scrollNow () function. This is not a onEndReached event issue. The above shows how to get FlatList’s builtin scrollToIndex function working by implementing getItemLayout, which is required to use scrollToIndex as per the documentation. import * as React from 'react'; import { StyleSheet, View, Text, FlatList } from 'react-native'; export default class Conversation extends React Jul 11, 2017 · react-native: 0. Oct 12, 2021 · Array. page - 1) * 5}); after rendering items. The code below should work. OS === "ios" ? list. So I search it but not getting something which help me to solve. Maybe this event is working for you and will be happened when the FlatList is mounted on your project. //import. Jul 23, 2020 · The problem am facing is, after new item is added to the FlatList, am trying to scroll the FlatList items to the bottom so that the newly added message is visible. Here is my list: <FlatList. 5 May 20, 2022 · I tried to move the card upwards using useEffect with these functions scrollToOffset,scrollToItem, scrollToIndex etc. Without setting this prop, FlatList would not know it needs to re-render any items because it Sep 7, 2018 · Not able to get the ref of flatlist. I have also tried many workarounds with no use. I created a ref for the list that I want to scroll with const schoolList = useRef<FlatList<School>>(null); The assigned the ref scrollToIndex in VirtualizedList; scrollToLocation in VirtualizedSectionList; scrollToLocation in SectionList; The bit that fails is when VirtualizedList attempts to call this. In this answer I have mentioned a very easy code snippet where there are 2 buttons to scroll flatlist right or left. So you could pass a empty view with a width of for example 15 to it to get the right margin to work. isRTL && Platform. There is an issue that your structure is not correct. Tried using VirtualizedLists, same problem as FlatList. The behavior I want is using initialScrollIndex and showing the previous item instead of the next. But not sure how to use it as am following the Functional Component style of coding. It really depends on what your data source contains. current. FlatList scrollToIndex out of range. createRef(); <Animated. First I show how to implem Jan 23, 2024 · I use a Flatlist and when navigating to screen, scroll to the ID I get from params (using scrolltoIndex). But the scrollToIndex method seems to be not available when I create a custom component. Jun 27, 2022 · You can create a ref that you toggle before you call scrollToOffset or scrollToIndex, and then toggle again after the scroll animatino completes. This is relatively easy in this case because our listItem style specifies a fixed item height. Jun 10, 2017 · I have a horizontal FlatList, where each time it reaches the end, it automatically adds new elements to the list, so it kind of is an infinite list. listRef && this. It displays me. Did this work in previous versions? "react Aug 13, 2019 · Let me try to digest and try it later. 45. You can use this code to achieve other use cases of programmitically scrolling flatlist. Jun 9, 2018 · ScrolltoIndex not working react-native on a flatlist. 63. Sep 21, 2019 · You signed in with another tab or window. 0 Oct 22, 2023 · 1- Understanding the FlatList. Mar 22, 2021 · It is is simple code that use scrolltoindex. Nested scrolling is enabled by default. This is enable by default on newer versions of android, and all IOS Apr 22, 2024 · Optimizing Flatlist Configuration Terms VirtualizedList: The component behind FlatList (React Native's implementation of the Virtual List concept. It may be more correct to call it scrollToRowIndex since it does not work on item index in case of multiple columns. By passing extraData={selectedId} to FlatList we make sure FlatList itself will re-render when the state changes. flatListRef. For some reason the method onEndReached is being called several times if I put ScrollToIndex in my ComponentDidMount. length - 1 - index : index, }); For some reason ios scrolls to the opposite value in RTL localization. data={data} Jan 31, 2018 · the ref in FlatList is a function, not a string. Invariant Violation: scrollToIndex out of range: item length 0 but minimum is 1. FlatList is great when you need to show dynamic Apr 9, 2019 · Here is the image with initialScrollIndex exactly on the item I want. Without setting this prop, FlatList would not know it needs to re-render any items because it is also a PureComponent and the prop comparison will not show any changes. Refs to DOM elements expect an initial value of null rather than undefined, so you'll need to fix that as well. Dec 22, 2020 · scrollToIndex and scrollToLocation not working on FlatList, SectionList Sample code: (url) https://snack. May 7, 2021 · I have this category filter component in my react native application. im using react-native-swiper-flatlist as my swiper of screens. The problem is that when I refresh, the screen scrolls again to the item which I don't want. Basically what I'm trying to do is May 16, 2024 · My code works perfectly when the FlatList is set to horizontal orientation, but scrolling fails when I switch to vertical orientation. Why does it not scroll down at the first time screen May 27, 2021 · create a FlatList with 100 items, to many to fit on a page; call this. scrollToIndex({animated: true, index: tempIndex, viewOffset:0,viewPosition:0}); and my flatlist Dec 15, 2017 · I have flatlist with comments and if new one is added I want to scroll list to the bottom to see added comment. For the first time this component is loaded it does not scroll to given index item (i. So we cannot access the methods of flatlist. Mar 15, 2019 · I successfully used scrollToIndex for iOS but the same code is not working for android. I work on a horizontal list with the component FlatList in the tvOS environment. I suspect it's a ref problem. setTimeout(() => {. Modified 2 years, 1 month ago. It’s perfect for displaying scrollable lists of data. Now I want to use the scrollToIndex method of the flatlist component using ref so that I can scroll to top of the list by pressing a custom button. Link - Flatlist performance slow. For those who are still looking for a solution, scrollToEnd() is not working because it is triggered before the change is made to the FlatList . Viewed 2k times Nov 19, 2019 · flatListRef. I would think that when the currentIndex is >= data. I've been using FlatList a lot of times, and never had such experience. flatList. FlatList shows item 0 at the top of rendered list. ec vj vf es zv qo nj pj mm qc