10.2 - Troubleshooting

Here are some common errors that we see with React. These account for about 70% of beginner errors:

• Did you save the file after changing?

• Do you have an import statement for the component?

• Is everything in the return wrapped in one element?

• className is used, it's not class.

• Does the component have an export statement somewhere?

• Does the class component extend { Component }?

• Are putting that non-component, like routes, in there without { }?

• Are you trying to put your components inside {}?

• import { concepts } from './concepts';