npm start 不适用于本机设置

Question

Hei, I'm new to programming and trying to Setup my toolchain and create a new React Native project.

• If needed, install code editor (+ extensions), git, npm
• Install the Expo app to your phone. iOS or Android
• Use the expo CLI tool to generate an app skeleton
• Create a folder for your React Native projects
• use Git Bash or terminal to go to this folder cd foldername/otherfoldername/etc...
• npm install -g expo-cli
• expo init MyApp --npm
• choose 'blank' template
• if this fails on Windows due to missing interactive mode, use cmd instead of Git Bash Test that app works; run it and open in the browser (the interactive shell is needed to get the menu option (w) for launching in browser)
• cd MyApp
• npm start <---
• From now on open 'MyApp' folder in your editor/IDE to edit your project Create a remote git repository (Github) and push your app there

I have done these but I get this error when I write in my VScode npm run

• expo start

• Starting project at C:\\Users\\35845\\Documents\\ReactNativeProject\\MyApp

• Expo DevTools is running at http://localhost:19002

• Opening DevTools in the browser... (press shift-d to disable)

• Error: spawn powershell ENOENT

• at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)

•  at onErrorNT (internal/child_process.js:415:16)* at process._tickCallback (internal/process/next_tick.js:63:19)

• npm ERR! code ELIFECYCLE

• npm ERR! errno 1

• npm ERR! @ start: expo start

• npm ERR! Exit status 1

• npm ERR!

• npm ERR! Failed at the @ start script.

• npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

• npm ERR! A complete log of this run can be found in:

• npm ERR! C:\\Users\\35845\\AppData\\Roaming\\npm-cache_logs\\2020-08-26T08_53_44_736Z-debug.log

Can someone please help me with this. Thank you

Answer 1

use cmd instead of git bash or PowerShell on windows and try below steps and run:-

Delete node_modules folder
run npm cache clean --force
npm install
expo start

make sure you are inside your application folder (where package.json is present)