anchor.diff:  clj -m cljs.main -co build.edn -v -c -s
   ```
   
  -Let's verify that it worked:
  -
  -[source,bash]
  -```
  -clj -m cljs.main -s
  -```
  -
   Open your browser to http://localhost:9000. Open the Developer Console, you
   should see that `React.Component` got logged.
   
  
positive.code: clj -m cljs.main -co build.edn -O advanced -v -c -s
  ```
  
  
negative.code:         reagent {:mvn/version "0.10.0" :exclusions [cljsjs/react]}}}
  ```
  
  Change your source file to the following:
  
  [source,clojure]
  ```
  