FAQ: Local Setup with React Native - Testing the App on Expo

This community-built FAQ covers the “Testing the App on Expo” exercise from the lesson “Local Setup with React Native”.

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This exercise can be found in the following Codecademy content:

Learn React Native

FAQs on the exercise Testing the App on Expo

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Ok I’ve had to run multiple npm installs to get the project to finally start with npm start, then I installed the app on my phone but there is no option for a qr reader in the app anywhere or anywhere through the help section. I can’t get a simulator to run either. I was asked in the terminal to install xcode even though I wouldn’t be using it. This is all very confusing and not nearly as smooth as the instructions dictate. When was the video made? How often is content updated? I’ve been following along step by step and have issues every time. Any insight or help appreciated.

Update: After a little bit of time, multiple reboots and attempts instead of npm start I entered expo start and it started up faster. Is this a difference between mac and windows? Is it an updated form of starting the app? Again any help or insight appreciated.

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I still couldn’t run React Native app on my phone after multiple npm start s.
expo start is not even working as the local host 19002 seems blocked.

I don’t know what noop.js is
Help please

how to solve this issue?