README.md in react-rails-3.0.0 vs README.md in react-rails-3.1.0

@@ -30,11 +30,11 @@
 >
 > Have a great 2023 and maybe we get to work together again later in the year! 🙌
 
 Read the [full review here](https://clutch.co/profile/shakacode#reviews?sort_by=date_DESC#review-2118154). Here's [another review of a Shakapacker migration that led to more work](https://clutch.co/profile/shakacode#reviews?sort_by=date_DESC#review-2096078).
 
-## Resouces
+## Resources
 * [Click to join **React + Rails Slack**](https://reactrails.slack.com/join/shared_invite/enQtNjY3NTczMjczNzYxLTlmYjdiZmY3MTVlMzU2YWE0OWM0MzNiZDI0MzdkZGFiZTFkYTFkOGVjODBmOWEyYWQ3MzA2NGE1YWJjNmVlMGE). Then join the channel `#react-rails`.
 * If you are upgrading, you might consider migrating to the [react_on_rails](https://github.com/shakacode/react_on_rails) gem.
 * Source code example utilizing React-Rails: https://github.com/BookOfGreg/react-rails-example-app
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
@@ -66,17 +66,20 @@
   - [Camelize Props](#camelize-props)
   - [Changing Component Templates](#changing-component-templates)
 - [Upgrading](#upgrading)
   - [2.7 to 3.0](#27-to-30)
   - [2.3 to 2.4](#23-to-24)
+- [Other features](#other-features)
+  - [Replace `null` with `undefined` in props](#replace-null-with-undefined-in-props)
 - [Common Errors](#common-errors)
   - [Getting warning for `Can't resolve 'react-dom/client'` in React < 18](#getting-warning-for-cant-resolve-react-domclient-in-react--18)
   - [Undefined Set](#undefined-set)
   - [Using TheRubyRacer](#using-therubyracer)
   - [HMR](#hmr)
 - [Related Projects](#related-projects)
 - [Contributing](#contributing)
+- [Supporters](#supporters)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
 
 After reading this README file, additional information about React-Rails can be found in the Wiki page:
@@ -526,11 +529,10 @@
 ```js
 // Replaces calls to `ReactUJS.useContext`
 ReactUJS.getConstructor = ReactUJS.constructorFromRequireContext(require.context('components', true));
 ```
 
-
 ## Server-Side Rendering
 
 You can render React components inside your Rails server with `prerender: true`:
 
 ```erb
@@ -799,10 +801,30 @@
 For the vast majority of cases this will get you most of the migration:
 - global find+replace `React.Prop` -> `Prop`
 - add `import PropTypes from 'prop-types'` (Webpacker only)
 - re-run `bundle exec rails webpacker:install:react` to update npm packages (Webpacker only)
 
+## Other features
+
+### Replace `null` with `undefined` in props
+
+React-Rails converts `nil` to `null` while parsing props from Ruby to JavaScript. Optionally, you can configure React-Rails to parse `nil` values to `undefined` as per the following:
+
+```ruby
+# config/application.rb
+module TheAppName
+  class Application < Rails::Application
+    # ...
+    # Set to true to convert null values in props into undefined
+    config.react.null_to_undefined_props = true
+    # ...
+  end
+end
+```
+
+More information in: [discussion#1272](https://github.com/reactjs/react-rails/discussions/1272).
+
 ## Common Errors
 ### Getting warning for `Can't resolve 'react-dom/client'` in React < 18
 
 You may see a warning like this when building a Webpack bundle using any version of React below 18. This warning can be safely [suppressed](https://webpack.js.org/configuration/other-options/#ignorewarnings) in your Webpack configuration. The following is an example of this suppression in `config/webpack/webpack.config.js`:
 
@@ -855,10 +877,10 @@
 
 By contributing to React-Rails, you agree to abide by the [code of conduct](https://github.com/reactjs/react-rails/blob/master/CODE_OF_CONDUCT.md).
 
 You can always help by submitting patches or triaging issues. Even offering reproduction steps to issues is incredibly helpful!
 
-# Supporters
+## Supporters
 
 The following companies support the development of this and other open-source projects maintained by ShakaCode by providing licenses to the ShakaCode team. ShakaCode stands by the usefulness of these products!
 
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