This boilerplate uses the most recent release of Rails (as of 04/2019, 5.2.1). It also takes advantage of the Webpacker gem to integrate React (link to gem). As a bonus, the React testing environment is also set up for you, using Jasmine/Enzyme with PhantomJS. To set up this testing environment, I used this gist from my friend (link to gist).

Note that as of 04/2019, I have updated the Gemfile to not contain any version numbers. There were some updates since 2017. Ya know... just some. (Read as: A few hours of figuring out why everything was borked.)

• Clone down this repo to your desktop and rename as necessary.
• Run bundle and npm install to get all the dependencies sorted out.
• Run rake db:create to set up your database properly. (Be sure to rename all the appropriate stuff in the config files!)
• Before testing with React, you will need to add the location of your testHelper.js to the karma.conf.js file. To do this, navigate to karma.conf.js and paste the testHelper.js file path into the files array (I've also left a comment and an example there for you). It is also possible that you will need to run karma init. You can answer the questions from the prompt using this gist.
• When you want to run the servers to see your work locally, run both rails s.
• When you want to check your React tests, run npm test. (Run rake for Rails/Ruby tests.)

• The Webpacker gem comes with its own example that gets set up when you download it. You can read about how to connect the example to your work to troubleshoot the environment.
• As with any environment, not everything is going to be perfect. Please leave comments or questions for me, and I'd be happy to answer. This is a work in progress, and I'll likely be adding "dummy" components/pages for people to see how Webpacker interacts in a Rails environment.
• I did not add React Router to this. If this is something you think you'd use, I'd be happy to put this into package.json.