feat(swagger-ui-react): add showExtensions option (#7563)

Closes #5892

flavors/swagger-ui-react/README.md

@@ -101,6 +101,12 @@ HTTP methods that have the Try it out feature enabled. An empty array disables T
 
 ⚠️ This prop is currently only applied once, on mount. Changes to this prop's value will not be propagated to the underlying Swagger UI instance. A future version of this module will remove this limitation, and the change will not be considered a breaking change.
 
+#### `showExtensions`: PropTypes.bool
+
+Controls the display of vendor extension (`x-`) fields and values for Operations, Parameters, Responses, and Schema.
+
+⚠️ This prop is currently only applied once, on mount. Changes to this prop's value will not be propagated to the underlying Swagger UI instance. A future version of this module will remove this limitation, and the change will not be considered a breaking change.
+
 #### `showMutatedRequest`: PropTypes.bool
 
 If set to `true`, uses the mutated request returned from a requestInterceptor to produce the curl command in the UI, otherwise the request before the requestInterceptor was applied is used.

flavors/swagger-ui-react/index.jsx

@@ -24,6 +24,7 @@ export default class SwaggerUI extends React.Component {
       defaultModelExpandDepth: this.props.defaultModelExpandDepth,
       displayOperationId: this.props.displayOperationId,
       tryItOutEnabled: this.props.tryItOutEnabled,
+      showExtensions: this.props.showExtensions,
       showMutatedRequest: typeof this.props.showMutatedRequest === "boolean" ? this.props.showMutatedRequest : true,
       deepLinking: typeof this.props.deepLinking === "boolean" ? this.props.deepLinking : false,
     })
@@ -112,4 +113,5 @@ SwaggerUI.defaultProps = {
   defaultModelsExpandDepth: 1,
   presets: [],
   deepLinking: false,
+  showExtensions: false,
 }