CodeSandbox is an online editor that's built for web application development. Web application development is a growing field, and with all new configuration options it becomes harder and harder to focus on writing code. We make this easier by doing most configuration for you.
This focus on web application development allows us to do many more optimizations. We can analyze npm dependencies, we can show custom error messages for known errors, we can make projects easily searchable by npm dependency. The possibilities are endless!