React-rails: ReferenceError: Unknown plugin "transform-class-properties"

[Zatvobor]

In order to use ES Class Fields & Static Properties.
Here is my environment

react-rails-1.3.1
babel-transpiler-0.7.0

application.rb sets

    config.react.jsx_transform_options = {
      plugins: ['transform-class-properties']
    }

got an error message ReferenceError: Unknown plugin "transform-class-properties". What's wrong here? Thanks.

[kyr0]

Installing the plugin via npm solved the problem for me:

npm install babel-plugin-transform-class-properties --save

[Zatvobor]

I'll try it. Thanks.

[maier-stefan]

absolutely not working for me.

So i have installed
gem "react-rails"
gem 'babel-transpiler', '0.7.0

And i additionally have the plugins i need installed with:

npm install babel-plugin-transform-class-properties --save

So in my Root of my Project i have now a node_modules folder and the package.json.
It is all in place, so which part make actually the reference to the libs? is it the babel-transpiler ?

[msokk]

Ran into this. react-rails 1.x is still running on Babel 5, so there is no point installing babel-plugin-* npm packages nor babel-transpiler explicitly.

Got class properties working with old configuration style:

config.react.jsx_transform_options = {
  optional: ['es7.classProperties']
}

[node-gs]

This should really be added into the documentation, I'm using react-rails 2.4.6 and @msokk s answer was the only way to get it working

[BookOfGreg]

@node-gs Could you please submit a PR with a change to the readme with what you'd like to see? 📔

It's always very helpful for us as maintainers to have others contribute the docs because we know how the system works and therefore it's sometimes harder to explain it to a layman.