1. Project Structure

1.1. Why Include a Demo App?

Cannot put js in html. Put js in a .js file
```
<html>
  <body>
  <script>
  // slap code here...
  </script>
</html>
```
- Test this?
- Lint this?
- Reuse this?
- Transpile this?
- Import explicit dependencies?
Consider organizing by feature

Organize by file type (MVC)
```
/components
/data
/models
/views
```
Organize by Feature (larger app)
```
/authors
/courses
```
Extract logic into "POJOs" (plain old javascript object, no framework-specific code)

Put utils to utils folder, this doesn't have any relationship with react.