Warn when element is missing in devtool

[sophiebits]

Follow-up to #6867.

[sophiebits]

@gaearon

[gaearon]

Thanks, can you add a test for it please?

[facebook-github-bot]

@spicyj updated the pull request.

[kujon]

Would you mind shedding some light on when exactly this warning is raised? Started getting it when doing:

componentWillMount() {
  if (process.env.BROWSER) {
    this.context.clientOnlyProperty();
  }
}

and struggling to understand how to address it.

[gaearon]

It's against internal bugs in React, it's not meant for users. If you see it please file a bug with an example that reproduces it.

[adamryvola]

Hello,
I had a react project (without any warring) and today i've installed this project on friend's pc and i get too many warrings. I think it is caused by react-bootstrap. In IDE console warn is: Warning: ReactComponentTreeDevtool: Missing React element for debugID 1 when building stack
Here is screen of console in browser
https://drive.google.com/open?id=0BzAI-U4-wrvCbTlCV3JuazZBUHc

PS: really sorry for my english

[keyz]

Hey @adamryvola,

Have you got a chance to take a look at https://fb.me/react-unknown-prop?

[gaearon]

@adamryvola The warning on your screenshot does not match the warning in your comment. If you can reproduce Warning: ReactComponentTreeDevtool: Missing React element for debugID please create an issue linking to a project that can reproduce it.

[adamryvola]

@keyanzhang I am reading it just right now, thanks!

@gaearon Thanks for fast answer. You are right, these two warring are not the same. I thought they are, because there were no warrings before. When I replace react-bootstrap <Button> with standard <button>, browser console is clear and ReactComponentTreeDevtool warn is still there (in server console). I will try reproduce this warn in another small project and then create issue.

Thank you for help.