What is the meaning of 'No bundle URL present' in react-native?

Question

When I run a react-native project, I get a error no bundle URL present , but I don\'t know what mistakes I do, I was very confused.

Answer 1

I just ran into this problem as well (first time getting started with React Native). The problem disappeared when - while an ios simulation(react-native run-ios) was running - I ran npm install and then react-native run-ios again. In the terminal window, it showed that it was bundling, and then the simulator showed the welcome screen.

Check this link for briefs after react-native init PropertyFinder line try to use npm start (This one works for me)

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UPDATE for 16.9

My port 8081 was blocked by McAfee. Using a different port directly wasn't working react-native start --port=8082 and react-native run-ios --port=8082

Tried almost all solutions given here. but anything didn't work.

        "react": "16.9.0",
        "react-dom": "^16.12.0",
        "react-native": "0.61.5",

Solution:

Searched for 8081 in Xcode and replaced all of them with 8082. Then run the same commands to build and run the app. App works smoothly

react-native start --port=8082
react-native run-ios --port=8082