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Questions tagged [expo]

Expo is an open-source and free platform that lets web developers build truly native apps that work across both iOS and Android by writing them once in just JavaScript. Use the Expo tag on questions about developing Expo projects and using the Expo development tools like XDE and exp.

Expo lets web developers build truly native and Web applications that work across iOS, Android and Web by writing them once in just JavaScript. It's an open source, free toolchain built on top of React Native.

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14725 questions
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Disable Debugging in Expo For React Native App

So I've opened up my react-native app in Expo today (using the iOS simulator) and I am creating by what looks like a debugging overlay. Screenshot here: I don't need this and it's blocking some of the UI for testing. How does one turn it off?
Jack Robson
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Encrypting sensivite data in React Native and Expo

I'm working on a mobile app with React Native and Expo, providing security solutions. Project owner wants to store in app sensitive authorization keys, used to communicate with REST server and access secure data. He demands that these keys are at…
Outside_Box
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Expo cannot open development build on android emulator

I'm trying to run my Expo managed project on Android simulator with npx expo run:android. I have expo-dev-client installed. When I run npx expo run:android, it fails with the message: CommandError: Couldn't open Android app with activity…
hayata_suenaga
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6 answers

You gave us a visitor for the node type TSInstantiationExpression but it's not a valid type

After expo update, my project not working The error is: Failed building JavaScript bundle. node_modules\react-native-gesture-handler\src\index.ts: [BABEL] D:\data\Anonymous\ReactNative\test\node_modules\react-native-gesture-handler\src\index.ts: You…
anonymous pro
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12
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7 answers

Admob : Ad serving is limited - The number of ads you can show has been limited. For details, go to the Policy center

I'm new to admob. I published my first android app (written in expo react-native). I followed the instructions https://docs.expo.dev/versions/latest/sdk/admob/ on including admob ads in my app. But after sometime of including the ad Ids for Banner…
Sandeep Amarnath
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12
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5 answers

expo-barcode-scanner only works once with react-native version 0.64.2 and expo 43.0.0

Because of Google Play, I had to update an old project of mine to the latest expo versions (version 43.0.0 to be exact). The idea is for the app to scan a QRCode and process the data, simply. However, expo-barcode-scanner only works once and after…
Backup Gov18
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4 answers

Expo Error starting tunnel Failed to install @expo/ngrok@^2.4.3 globally

I'm trying to run expo with a tunnel connection and I keep getting the following error: Error starting tunnel Failed to install @expo/ngrok@^2.4.3 globally: npm exited with non-zero code: 243 I've tried installing this version of ngrok globally and…
SamH
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12
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3 answers

Promise allSettled is not a function

I planned updating some Promise.all to Promise.allSettled in my React Native - Expo Project but the function does not Exist. i checked all Versions and everything fits but i still cant use the function. node -v: 14.15.4 expo SDK -v version:…
jovan
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1 answer

React-Native expo POST Blob

I'm using react native with expo and I'm trying to POST a blob image through fetch api. I'm using form-data format for the body and i have the next code: const blob = await response.blob() const form = new FormData() …
Axel Ros
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12
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3 answers

"Expo Developer Tools is disconnected from Expo CLI." when trying to run react native project

Once I hit expo start expo runs for a few seconds but then gives me the following error: Error: EMFILE: too many open files, watch at FSEvent.FSWatcher._handle.onchange (internal/fs/watchers.js:178:28) I already made some research and people…
Sansibar
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12
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12 answers

New update available on Expo, infinite downloading

I'm new to developping with Expo. That new that I haven't started developping yet because of an issue. I followed a tutorial which shows how to use Expo to see how our app is doing.…
Alexandre de Temmerman
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12
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1 answer

TypeScript types for TextInput's onChange event in React Native

I have a React Native Expo project using TypeScript. How can I add types for the onChange event for the TextInput? ): void =>…
Evanss
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12
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2 answers

Missing Debug JS Remotely option in Developer Menu

In order to use React Native Debugger, I don't see the option 'Debug JS Remotely' when I open the Developer Menu both on my android simulator and my physical device, using expo. Tried both scenarios and no option for Debug JS Remotely... (I…
Volkan Ersan
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2 answers

How to save image to Camera Roll using Expo?

I'm creating an app using Expo to take picture, I'm already possible to save pictures to FileSystem.documentDirectory, but this is not what I want. I tried to save image to Camera Roll using code like this: import { CameraRoll } from…
Lai32290
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12
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4 answers

How to force users to update the app using react native

I have updated my app on app and play store and I want to force my app users to update the new version of app in App store and playstore.
Arham Shahzad
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