React Native debugger doesn't work with React Native v0.21.0-rc

[Nikamura]

Issue and Steps to Reproduce

• Create project using RN v0.21.0-rc
• Start packager
• Start react native debugger in atom
• Enable "chrome debugging" in the application

Expected Behavior

• Nuclide attaches automatically, and application loads normally so you can continue debugging.

Actual Behavior

• Nuclide attaches automatically, but application is stuck at loading from localhost:8081...
  

Versions

• Atom: 1.5.3
• Nuclide: 0.119.0
• Client OS: OS X 10.10

Additional Details

/Users/*/.atom/packages (1)
└── nuclide@0.119.0

I know that 0.21.0-rc changed some stuff in the Chrome debugging facebook/react-native@64d56f3 so don't really know if this is atom bug or React Native

[matthewwithanm]

Hi @Nikamura! Two quick questions. Have you used the debugger successfully with a previous version of RN? Also, what version of node do you have installed?

[Nikamura]

@matthewwithanm Just tested with the latest stable version and it didn't work also. So no.
Node version is 5.7.0. Just saw the video from the conference where you guys displayed all the cool tricks Atom can do, so wanted to give it a try over ST3.

[matthewwithanm]

Ah, I think I see. Sometimes the debugger gets stuck for some reason. Can you hit the Pause button (F8) and see if it resumes?

[Nikamura]

Tried on two different RN apps on two different simulators, got two different errors after clicking fn+f8 (osx)

[matthewwithanm]

Okay, those are RN issues 😢

I have commits in to fix it (facebook/react-native@bb3d8d5 and facebook/react-native@ecf6981) that I'm hoping to get into 0.21.

[Nikamura]

Okay cheers, I will cherry pick them until then. Have a good weekend:)

[matthewwithanm]

You too! Thanks for helping me diagnose!

[Nikamura]

It works, but I don't know if the behaviour is intended https://gfycat.com/UnconsciousImaginativeEel it always come up paused or something cause after each reload I have to press FN+F8, should I be using hot reloading to be able to use the debugging?

[matthewwithanm]

The paused thing is a bug 😢. I'll try to figure it out ASAP.

[Nikamura]

@matthewwithanm the bug where debugger starts paused (tested with nuclide master) is still present. Do you need any help debugging it?

[matthewwithanm]

Sorry, I've been working on an overhaul of the debugger stuff that's taken longer than anticipated. I'll put in a quick fix for this today.

[Nikamura]

Okay, thanks. Waiting for it.

[matthewwithanm]

Hey all! I've pushed a bunch of updates. Here's the current story (as of bb3311c):

1. You don't have to unpause between reloads (yay!)
2. The debugger isn't paused when you attach it if you're running node 4 (yay!)
3. …but it is if you're running v5 (boo!)

I've opened a new issue (#402) for the remaining bug. Thanks for bearing with me!