feat(strip_types) accept strip_types config

Author: rmosolgo

README.md

@@ -68,10 +68,13 @@ Component = React.createClass
     `<ExampleComponent videos={this.props.videos} />`
 ```
 
-You can use the `--harmony` option by adding a configuration to `application.rb`:
+You can use the `--harmony` or `--strip-types` options by adding a configuration to `application.rb`:
 
 ```ruby
-  config.react.jsx_transform_options = {harmony: true}
+  config.react.jsx_transform_options = {
+      harmony: true,
+      strip_types: true, # for removing Flow type annotations
+    }
 ```
 
 ### Unobtrusive JavaScript

lib/react/jsx.rb

@@ -26,7 +26,11 @@ def self.context
     end
 
     def self.transform(code, options={})
-      result = context.call('JSXTransformer.transform', code, options)
+      js_options = {
+        stripTypes: options[:strip_types],
+        harmony: options[:harmony],
+      }
+      result = context.call('JSXTransformer.transform', code, js_options)
       return result['code']
     end
   end

test/dummy/app/assets/javascripts/flow_types_example.js.jsx

@@ -0,0 +1,3 @@
+function flowTypesExample(i: number, name: string): string {
+  return "OK"
+}

test/jsxtransform_test.rb

@@ -54,10 +54,17 @@ class JSXTransformTest < ActionDispatch::IntegrationTest
 
   test 'accepts harmony: true option' do
     React::JSX.transform_options = {harmony: true}
-    get 'assets/harmony_example.js'
+    get '/assets/harmony_example.js'
     assert_response :success
     assert_match(/generateGreeting:\s*function\(\)/, @response.body, "object literal methods")
     assert_match(/React.__spread/, @response.body, "spreading props")
     assert_match(/Your greeting is: '" \+ insertedGreeting \+ "'/, @response.body, "string interpolation")
   end
+
+  test 'accepts strip_types: true option' do
+    React::JSX.transform_options = {strip_types: true, harmony: true}
+    get '/assets/flow_types_example.js'
+    assert_response :success
+    assert_match(/\(i\s*,\s*name\s*\)\s*\{/, @response.body, "type annotations are removed")
+  end
 end