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JavaScript React Basics (retired) Thinking in Components Properties Review

I think this is the right answer, why is it not?

I keep getting notified that my answer is wrong, but i think this is the right answer to the question/task :

React.PropTypes.string.isRequired

Gustavo Winter
Gustavo Winter
Courses Plus Student 27,382 Points

Your answer is right, you only need to capitalize "string"

React.PropTypes.String.isRequired