JavaScript React Components Managing State and Data Flow Adding Items to State

Joseph Michelini
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Joseph Michelini
Python Development Techdegree Graduate 18,692 Points

What are the syntax rules for adding component properties in React?

At some point in the video, we initialize a property prevPlayerId in App.js to 4. The syntax caught me a little off-guard, because we use a = to initialize it, and I'm used to using : to initialize properties on objects and classes. Is this similar to calling the App component and adding the property in-line, except in this case we're adding it in the class definition?

Thanks in advance!

1 Answer

Clinton Hays
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Clinton Hays
Front End Web Development Techdegree Graduate 16,420 Points

Hey Joseph,

I think I'm understanding your question correctly and believe I have the answer. We can initialize properties of the component by declaring them and initializing them this way. This is similar to the way we initialize the state of the App. The only difference is with state we are creating an object while prevPlayerId is just initializing a number.

I submit this answer with the caveat that I am only mostly sure that I've got it right. Haha. This is just the way that seemed to make sense to me.

Happy coding!