This function is undefined react native. An object does not define the function map.

This function is undefined react native About; react-native counter, function is undefined. If you just pass reference to function/method, it seems that react will invoke it as independent TypeError: signUp is not a function - React Native Redux Typo. One common JavaScript error that developers encounter in React Native is the "TypeError: undefined is not a function" error. executeSql function when I query the sqlite. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Trying to manage state between parent/child components in React Native. const AuthUserContext = React. Hey guys, If you find it hard to get clients as an indie developer / freelancer --- Perhaps this might help a) Go to Upwork. Commented Dec 22, 2021 at 22:46. I'm using Animated. focus() undefined. 0) documentation you have to install StackNavigator separately. removeEventListener('url', onReceiveURL); removeEventListener is deprecated. I am having a very odd issue recently with one of my project, in one of my page I use a fetch in order to get a file from internet and use the result. params I get undefined. By not using useState(), React will not know that the data you are wanting to I also had this issue and found this reply from the clerk team on a discord channel: "This is a known issue in our latest version of @clerk/clerk-expo and we have a patch coming out in the next release. Hot Network Questions Are there prefixing languages with vowel harmony I'm supervising 5 PhDs. data as an empty array, and you can delete the part when we check if it's undefined since an empty array will return false then your version probably does not fit the version of react-native-stack. Clearing a cache sometimes can help you work around issues related to stale or corrupt data and is often useful when troubleshooting and When you are exporting a single component from a file you can use export default abc and this can be imported directly in other files by import abc from '. bind() to it before it is declared. I'd greatly apprectiate some assistance! upvotes · comments My bad my friend. React Native . I've used private js methods in some of the classes and The error is appearing in the return and reads "Object is possibly 'undefined'. Your function ran immediately instead of after the onPress event. _reset' is undefined) at h I'm attempting to import a function defined in a 'context' file so I can access the user data across the whole app easily. display marker. For reference, here is the component which I'm calling the context function from: I have tried everything with google help plz someone plz get me a solution for this. navigate('Merchant', store ) but when I try to actually use route. You should not wrap Animated. setState' is undefined, but i'm not sure what I can do to make "this" refer to the proper context for setState. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company TypeError: “FunctionName” is not a function async and await - React Native 0 Unhandled Promise Rejection when trying to call external function from async function The arguments that will be passed to the onChangeText handler do not include the event object. js as a dummy component, you can directly use the same code of routes. React-native Animated api : undefined is not a constructor (evaluating 'new _reactNative. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 1) Go to your package. Whereas traditional frameworks like React and Vue do the bulk of their work in the browser, Svelte shifts that work into a compile step that happens when you build your app. x. Explore Teams listRef. Hot Network Questions Pull Chances for Powerups in Mario Kart 8 Deluxe Free Kei Friday A superhuman character only damaged by a nuclear blast’s fireball. value(0)') I've been trying to pass data from my home. useLocale is not a function (it is undefined) #12237. (errors installing Firebase) You're using React. 2) Change the version of @react-navigation/stack to a 5. Explore Teams Not 100% sure without setting up the code myself, but it looks like react-navigator might have changed up the API a bit. fullName'); although my code is pretty much identical to the one in React-native docs. On my history page, I built a table using the react-native-table-component library, and on pressing the column of the table, it would redirect the user to a page called 'test'. I have found out what went wrong, the destroy function was removed from react-native-track-player few minutes before I installed it and that's like 15 Possible Unhandled Promise Rejection (id: 0): TypeError: Cannot read property 'title' of undefined in react-native-track-player. bind(this)} /> React native: Undefined is not an object. The Overflow Blog WBIT #2: Memories of persistence and the state of state React Native function not recognised on TouchableOpacity function "onPress" 1. 3 I dont know this version supports v6. this is accessible in JSX context as your component object, so you can call your desired method inline as this method. this error doesn’t have anything to do with the api, it’s just telling It seems that the issue doesn't contain a link to a repro. So instead of doing. You initialize your ref without a value, so there will be a moment that ref. js . I'm trying to organize my stacks by placing different stacks for different components in different files and . current?. js screen to my merchant. 'some function' is not a function and I really have no idea what to do. Improve this answer. (In 'verifier. 0) Can you verify that the issue still exists after upgrading to the latest I need help with this, I'm stuck. so normally if you are testing without Expo you would register your app with for example: AppRegistry. @react-navigation/native (found: 6. Based on the documentation (link), useFocusEffect is what I should I've created the following code to import into app. 8. once() method code, you can clearly see why this is the case. get Native Component is not a function (it is undefined). forEach') I had. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Importing AsyncStorage from 'react-native' gives no problems, only warning that AsyncStorage should be imported from '@react-native-community' because the AsyncStorage from 'react-native' is deprecated. 2, latest: 7. Asking for help, clarification, or responding to other answers. AppState. Below is function code snippet. When importing it, and calling it in my 'useEffect' however, it's claiming it isn't a function - when it clearly is. 0 ; npm version 4. Make sure you have a version compatible with @react-navigation/native's listed dependencies. You're also using . You should have a file that handles your routes configuration, let call it MyNavigation. push') 4. I'm not even exactly sure what is undefined because it just says "near". I am trying to add a user object to my user collection when a user is created via the sign up screen, but it is not adding in the database, a I have also tried to use react native's findNodeHandle() utility function on the received flatListRef parameter, but it returns null. You are invoking the function instead of passing a reference through bind. React Native Maps Version. When your files have many components/functions, you will have to export each function individually using export functionName and import them using. 7. 4). react-native As described in react-navigationv(4. It is an object. but I get en err saying that measure is undefined and indeed I can get the ref correctly I made sure of that but when I printed all the key inside the object here what come out : TypeError:undefined is not a function . It's worked for me. React Native navigation: undefined is not an object. If useScreens() has been deprecated, it is probably removed in 3. I'm trying to make an API call in React Native to handle user authentication. React-navigation-tabs version is 1. const changeFocus = => { refName. For Android, the instance declaration would look like so (probably Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. songBuilder--works as this point to current object. I found this example, let's try:. Help me to adjust the Marker so that is works and stops showing the error: ERROR Type Error: this . It is a global function , not inside any class. 1 or no – Muhammad. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm new to react native and have been trying to fix this for hours. react-native run-android. 0 and you need to go down with the react-native-screens-version or go up with react-native-stack – Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; Hi, First of all thank you for making/maintaining this awesome library. I haven't attempted to display a photo in this way before. 0 "TypeError: _this2. Judging from the object itself and the properties that you Hi @user3812411 I am importing like this import { Platform, SafeAreaView, StyleSheet, View, useColorScheme } from 'react-native'; – ramesh m Commented Oct 18, 2021 at 13:56 AppState removeEventListener is not a function #2378. then() and . measure property of react native? Ref Question: React Native: Getting the . You can even initialize this. This library works fine when added into bare react-native project. But i have issues to w This is a pretty basic React Native app I am making with Expo CLI. Commented Jul 24, 2019 at 20:08. WARN Non-serializable values were found in the navigation state. onPress={this. If your function is defined within an object, calling it directly from an object will set its context to the While it is undefined (at the start) we return null, when it stops being undefined we call this. React Native error: undefined is not a function. React native push is not a function. json file in your project. Share. Comments. This looks to be the version conflict between the react-navigation-drawer package with react-native-reanimated. You switched accounts on another tab or window. I checked the Keyboard class' methods and actually, I CAN see a method called Hi guys i'm new to react native. getItem') Hot Network Questions Is the finance charge reduced if the loan is paid off quicker? A community for learning and developing native mobile applications using React Native by Facebook. Actual result. This is a common problem with React, specially when you don't understand the newest JS standard (like ES6, that is used by React). The MapView works, but the marker does not. 12. What platforms are you seeing the problem on? Android, iOS (Apple Maps), iOS (Google Maps) So, I was building a simple mobile application on react native. 10. React Native noobie. When I invoke a method in another method, it keeps returning me this. First it to replace setData(results) to setData(results. 1 and mobx - 6. That's what useState() is for :). By removing the . 1. 4. Just now got it fixed. When you are changing this name to userData (which is missing in the function argument), you are getting Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. REACT_APP_API_KEY, authDomain songBuilder()--returns "undefined" since this points to the window. native. Reload to refresh your session. Try importing and using createSwitchNavigator() instead of SwitchNavigator(), and look here for more documentation on the config: react-native; react-navigation; undefined-function; touchableopacity; or ask your own question. When i press button for openDrawer i'm getting . I would like to import local . Example: "@react-navigation/stack": "^5. 1. Linking. In my case, I removed an explicit override in my package. Follow answered Feb 28, 2019 at 11:52. exports = { presets: ['module:@react Sometimes, you may want to check if a value is undefined or not in react native. Also you have to import styled component from 'styled-components/native' import styled from 'styled-components/native' You can create a CustomButton component as Below I can't access the data passed by createContext using useContext hook in the functional component in react native : context. I am building a simple React-native app with Expo for rating Github repositories and ran into a nasty issue. json and ran npm update @react-navigation/core There are a number of different caches associated with your project that can prevent your project from running as intended. Normally, you use the deconstructing form to obtain directly some attributes of props. You can see this in your log message that restaurants is initially an empty array, but after you call setRestaurants(data) it is an object. /abc'. props. The code executes exactly as if it were written like below. 1; react-native version 0. node version 7. selimjouan opened this issue Feb 11, 2024 · 7 comments Closed 1 of 5 tasks react-native-firebase version you're using that has this issue: 18. com and post a job for 'Lead generation specialist'. I'm using React Navigation in my React Native project with a combination of Stack Navigator and Drawer Navigator, but when I try to use navigation. React-Native: Element type is invalid: expected a string (for built-in components) or a class/function (for I'm setting up a new function and getting an error: "item. event with function. once() method, the return statement React Native Navigation Undefined is not a function. So I have a Button component import React, { Component } from 'react'; import { View, Text, TouchableNativeFeedback } from 'react-native'; class Button extends Component { generateComponent() Reason is that, every object in the data array is referenced through item property of the actual parameter passed to renderItem function. setTemp is defined and make sure it’s being passed and then received. removeListener('url', ): Method Expected result. focus(); } Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. svg file and transform into SvgXml component. In your constructor, bind onButtonPress function, add this line in your constructor: I'm working through a react-native course on Udemy. Thanks in advance! Parent: [🐛] TypeError: _this. Using functional components and hooks. React Native Navigation Undefined is not a function. 9. I keep tweaking the function but can't seem to get it to work. Error: ERROR Warning: TypeError: this. TypeError: Cannot read property 'focus' of undefined in ReactJS. render: function {} or switch to ES6 classes, which would make your current class look like this Summary After installing react-native-maps, I cannot implement markers. addDrink (Function) If I dismiss the warning and try to click the save icon, I get the following error: ERROR TypeError: navigation. render => {} do. createDrawerNavigator. My problem was that, integrating React Native, the guide on creating native modules did not mention that the package needs to be declared in the ReactInstanceManager instance in this scenario, not in the main Application file. bind(true). Any help is appreciated. Change. loose the (). _reset()', 'verifier. Component { render() { return ( <AppNavigation/> ); } }' don't forget to mark @user7747472 - See the linked question's answers. React-native . But actually i don't understand react navigation very well probably. split is not a function" This is a function for search suggestions so for example if I will search the number 7 or 78 so it will return me the error: "item. Animated. I have installed it with npm React-query & React-query-devtools and have only 2 files. 0 (all react-native-firebase packages have the same version) I want to use the native driver for dealing animation in React Native app. I want to use drawer navigation with menu button. So i used "response" :D You have two options. Hi thank you, I am using react-native-firebase v 5. You need to make your function call conditional so that it only happens if ref. state. The usual scenario you face undefined property is while iterating through a JavaScript object I'm using the latest react-native - 0. Modified 3 years, 11 months ago. 14", 3) Run Hi, I upgraded to the last React Native version currently available - 0. 72. 1, and @reduxjs/toolkit - 1. email and this. And I don't know why. I have forked the project and fixed it, maybe instead of using it as "external module" just use my fork or do your own and install it directly this way. FlatList, and I want to define onScroll outside the render function. /firebase' export function MainNavigator() { const [token, setToken] = useAtom I ran into this issue for a long time adding React Native to an existing android app. I'm new to React Native and I'm trying to perform a simple stack navigation. . goBack is not a function (it is undefined), js engine: hermes The button component I am using is as follows: The reason React thought it was undefined is because the function execution didn't have a return value and was therefore returning undefined. b) Go to clutch. 2. I already have a populated SQL Database called (I know this is a bad name) pythonsqlite. openDrawer is not a function (it is undefined), js engine: hermes; Code Overview: Home. showTickets. You signed in with another tab or window. log&quot; pop up successfully. Also Counter doesn't have setSearchTerm method which you are trying to access. So, your problem is conceptual here. run npm install react-navigation@^3. 5 in my project. 0 run npm install react-native-gesture-handler Then import it in your code : import { createStackNavigator} from "react-navigation-stack" import { createAppContainer} from 'react-navigation' react-navigation undefined is not a function (evaluating '(0 _reactnavigation. _reset is not a function. TypeError: 0, _native. Modified 4 years, 8 months ago. I know that you can display base64 images with {uri: 'data:'} so if you can get the base64 image data which I believe you can from a local photo lookup you could display it that way. current is undefined before it gets the value of the component that you attach it to. Here, you are using object destructuring to extract only item property of the passed in object, thats why u are using {item}. import { functionName, functionName2, functionName3 } here the signInWithRedirect function who appear as undefined in my console but detected too by IntelliSense. This is what my IDE suggests : EventEmitter. Skip to main content. config. React Native error: undefined is not an object (evaluating '_this2. So React used the result of the function as the onPress event handler instead of the function itself. Modified 3 years, 7 months ago. transacation} in react native-cli using sqlite Unhandled promise rejection: Error: Database Table error: undefined in react native. npm install react-navigation-stack --save. reduce'). configureAuthDomain is not a function (it is undefined) #7619. The best way to get attention to your issue is to provide an easy way for a developer to reproduce the issue. push' is undefined) but if I use navigation. map undefined is not an object. Finally no, have the same issue on vanilla react native, I'm working with React Query and try to get data (users) from a JSON file inline. Due to the async nature of the . Ask Question Asked 7 years, 3 months ago. 4 with expo, react-native-maps - 1. setState is not a function. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. js Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; styled. js module. I installed it with npm install react-native-camera and then linked it with react-native link Text, StyleSheet, TouchableOpacity } from 'react-native' import { RNCamera } from 'react-native-camera' function PlayWithCamera() { const The issue here is that restaurants is no longer an array after you have set the server response. Interpolate function from Animated return is not a function I am following this, but I am currently doing it as function component (chapter : &quot;Designing the Tinder Cards Movement&quot;): https I have a react-native application and I would like to execute a function every time a particular screen's state become "focused". Then import createStackNavigator from react-navigation-stack: . setState is not a Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. createClass with arrow functions, this messes up the binding to this. You're binding a boolean value as the this context of your function with . button works in React (web), if you want to style a Button in React-native, you have to use Button component provided by react-native. A TypeError: navigation. I only know how to do this with functional components but do this Put RBSheet or whatever ref'd sheet in the child component. 5. 44. undefined is not a function evaluating 0,reactnavigation. removeEventListener' is undefined) Environment. React Native Expo App: TypeError: undefined is not a function, js engine: hermes. React native TextInput ref error, focus is not a function. Ask Question Asked 3 years, 7 months ago. import child component into parent component (import component with slide-up sheet into main component The React-navigation version is 4. 0. There's no other details after that message,but when I attempt to login/register, I'm seeing the &quot;console. env. i try to move on vanilla react native and i will tell if it works – Wawa. registerComponent('SimpleApp', => SimpleApp); But with Expo it will take the root Component exported as default and it will show it in the Expo app: 'export default class App extends React. From the docs:. Your renderContent is a method. (In my case, undo the manual steps) Seems like there it shows the steps to react-native Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I have a react native project and am using firebase v9. Changed text is passed as an argument to the callback handler. If you forget to bind onButtonPress function and pass it to onClick, this will be undefined when the function is actually called. Viewed 1k times is not a function in React Native. 2. I too faced this issue and broke my head for the last few weeks. I have found the same issue posted multiple times in the past here on Stack Overflow, most with no answer, or which do not work for me. interpolate() was renamed I have a React Native App and have the following function: import firebase from '. split is not a function" Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js in your app. Viewed 359 times Error: Cannot read property 'push' of undefined React Native. js import React from "react"; import { View } from "react-native"; import { createStackNavigator } from "react-navigation"; import HomeScreen fro I want to get connection status in my react-native app so when there is no internet, I get an alert box with message, &quot;check your connection and retry later&quot; For that reason, I included n Expo Snack app based on @react-navigation/native works on its Web variant but it crashes as it is started both on its Android and on its iOS variants Load 4 more related questions Show fewer related questions Axios is undefined in React, error: Uncaught TypeError: Cannot read property 'post' of undefined 1 Axios post is not returning data when used in a function call in a react application I am using AsyncStorage to try to persist my redux state in my react app, but I get this error: TypeError: undefined is not a function (near 'state. js is as import React , {createContext,useState} from 'react'; export c I've recently ran into an issue with React Native Navigation that I cannot seem to solve. createContext({ user: '', setUser: => {}, // <-- indicate setUser is a function }); See Updating Context from a Nested Component. StackNavigator)') 0. push is not a function. The linked questions answers show you how to ensure the correct this is used. TypeError: undefined is not an object (evaluating 'BMDPedometer. I ran into this problem because I had an old version of @react-navigation/core. ts(2532) ". 0 ; react-native-cli version 2. Addressing this: Whenever I put a return statement after the firebase "once" function, it does return a boolean, but for some reason it is always false. I don't know what else I can bind to help. React components receive a single object, named props, that contains all the props. The stack navigator adds the following methods to the navigation prop: push Pushes a Ask questions, find answers and collaborate at work with Stack Overflow for Teams. navigator. An object does not define the function map. getNativeComponent is not a function (it is undefined) Here is my babel. I want my Collection component (the parent) to be able to update state of an array after calling an onDelete function from the child. onChangeText function. the plugin that caused the bug in the first place is not needed in those versions anymore (at least in my project), so maybe try to update your project and Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company From other questions, one way to do is by using . Also, for anyone else who may reference the code I pasted in my question; make sure Hello im new in react native and i just building my first react native project with camera without expo. The execution environment is different from a web browser. catch() on the function declaration. Stack Overflow. How can I leave the Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. This is my custom component DataSlideInput. Svelte is a radical new approach to building user interfaces. 0. Callback that is called when the text input's text changes. – Jordan There is no global window. Undefined is not a function whenever I try to create a new react function. js: import { QueryCl Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. db with a table Users that I am trying to query using react-native-sqlite-storage. James Siva James undefined is not a function React native. When I am trying to render a list of the repositories with Flatlist it throws me the following error: undefined is not an object (evaluating 'repository. details). js f I'm getting the following error: Possible unhandled promise rejection (id:0: Network request failed)` Here's the promise code, I don't see what's wrong here, any ideas? return fetch(url) . I'm passing this. But value is always undefined. bug needs repro package:react-native-tab-view platform:ios. TypeError: null is not an object (evaluating 'TrackPlayer I am trying to implement Phone Sign In in mu react native app, but I am getting the following error: verifier. So first install StackNavigator:. password (both bound to text inputs) to a function in my services/ folder, Counter in the code above is just a function, which actually doesn't return anything. – T. 2, mobx-react-lite -4. co > find react native agencies that warrant large budgets > add them to spreadsheet and share it with your lead generation specialist to fill in the 'verified email' column. React Native sqlite3 path not found. Also if this is the initial declaration of the function, you are trying to . I have looked at the other answers for similar errors but had no luck. Check: Add Drink > params. listAll() function is undefined (react-native-firebase) Ask Question Asked 5 years, 5 months ago. You would need to declare it first. Closed RalissonMattias opened this issue Dec 5, 2022 · 8 comments 'f. js screen by using navigation. I'm in the middle of learning React Native and Redux and there are many similar problems to mine in here but I'm having a hard time to relate with my problem. Any kind of data that you are dealing with (for the most part with a few exceptions) should all be handled and maintained with some sort of useState() hook. I got it to work in another part of the application (User authentication step). When I run a new react-native app in Android device I am getting this Error: undefined is not a function (evaluating 'transform. renderContent={this. addEventListener function in React Native. this. Getting ReferenceError: Can't find variable: TouchableOpacity due to a method in onPress Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. You dont need to use app. Closed 1 of 5 tasks. I am facing problem returning value from a function in react native. Saved searches Use saved searches to filter your results more quickly If the photo is on your device I believe you just use the URI bit. And the thing is that getmysqliData dosn't excute tx. Here are some of my code. catch() are used on the function invocations. I didn't notice that u have "results". This error occurs when an attempt is made to You’ll need to look to see where the function props. IlirBajrami opened this issue Nov 7, 2024 · 10 comments Labels. I am assigning return value to a var. Firebase is also receiving the info as well Here is my When using react, you never want to grab data from a source and manually try to control the state. I have tried StackOverflow every answer but didn't get this Fixed! All I had to do was install react-native-reanimated and NOT to do the manual steps that the documentation shows. Ask Question Asked 3 years, 11 months ago. isStepCountingAvailable') 1. J. {near db. 0; I use Windows 10 (64 bit). get Native Component is not a function (it is undefined) From nowhere this problem came up because it was working fine before, then all of a sudden it says ERROR Type Error: this . import { createStackNavigator } from 'react-navigation-stack'; react-native FlatList undefined is not an object (evaluating 'props. _renderContent} just passes the function reference, without anything to indicate what this to use. App. Here's my Couple things wrong. You signed out in another tab or window. import app from 'firebase/app'; const config = { apiKey: process. Cannot read property 'map' of undefined in react js. That make me think that you didn't know how the stack navigation or navigation in general functions in react native. I searched a lot to find the solution and I tried many of them but get different undefined errors. the whole c It is telling me this. current has been set:. Crowder You should notice that this depends on how function is invoked ie: when a function is called as a method of an object, its this is set to the object the method is called on. javascript; firebase; react-native; firebase-authentication; Share. Provide details and share your research! But avoid . navigate, it works I changed module:metro-react-native-babel-preset-> module:@react-native/babel-preset, and problem solved! // babel. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You signed in with another tab or window. The push method for the navigation prop is added additional for the StackNavigator. You can compare this with the official documentation. (In 'navigation. js and the debugger gives me TypeError: undefined is not a function in every call to any custom component. js and then define the routes 'Main It's not the framework, it's you. push('Restaurants', { name: params })', 'navigation. Modified 7 years, 3 months ago. 4, and the last React Native Maps and mobx that are currently available (react-native-maps - 1. map is not a function in react-native. And you should not wrap it with an arrow function as bind is already returning a new function instance. btnPress. One of my screens has a button with an onPress function that querys the database for all users: I'm working with React-native-sqlite-storage (React native CLI). openDrawer() in my component, I'm getting the following error: ERROR TypeError: navigation. Improve this answer React native - TypeError: undefined is not an object Please check your import method. npteis htgq bezz demis xknbdwk lhrph pxtuhr tsqfwy ykw uuuwapp