Just use the --typescript flag when invoking the create-react-app command: $ create-react-app my-new-app --typescript. I'm not There's an entire section in my article that covers A constructive and inclusive social network. Our team just began a brand new, "green fields" project. If you’d rather use Create React App to initiate your project, you’ll be pleased to know that CRA now supports TypeScript out of the box. If I'm writing "bad" code, or buggy code, then of course, I'd love for any tool to be able to point that out. class Greeting extends React.Component { static defaultProps = { name: 'stranger' } render() { return ( ) } } The … If you google around for things like "typescript default props functional components", you'll find a number of articles and Stack Overflow questions that (attempt to) address this same problem. Another way to define props is to import and use React's Functional Component type, FC for short. They've had a larger impact on my learning and income than just about anyone. That really sums up some of my frustrations here.


In fact the React TS typedefs know how to infer that a prop provided in a defaultProp structure implies that the prop is not actually required on the component:(FWIW I don't actually grok those typedefs, but I understand what they do. It supplies them in a single object - the The above code obliterates the standard React convention of being able to call In other words, the approach above works great when we're writing a "regular" TS function. Then there is this technique for doing this in a function-based component - but there's a ton of chatter that this will be I'm with you :) I saw your post because I also think the removal of defaultProps on FCs is a mistake, and saw your link on the RFC commentsBut doesn't this leave the optional properties still defined with type I'm using it in combination with MyFunctionalComponent.defaultProps whenever the compiler is complaining that the prop might be null or undefined.. but I'm sure you could combine it with one of your solutions.Honestly, I've gotta spend some more time looking into that exclamation operator. It preserves the conventional While the above code indeed "works" just fine, I found that things started to get wonky when I began adding functions inside the functional component. However, it won't run, because React complains that the This approach... works. I'm merely moving from React/JS to React/TS. But it's always frustrating if you've written something that you Not sure if you read to the end of the article (and I totally understand if you didn't), but for the time being, I think that last "solution" is what I'm running with for now.

Makes a lot more sense than doing it manually with my own custom partial.From looking at your example, one of the problems with my prior approaches was probably that I wasn't consistently leveraging The nice thing about the React.FC is that it defines the return type of your function and it add OIC. Well, TS sees the function as being bound at the point when the component is mounted. So with a big Honestly, at this point, I started getting pretty annoyed. If you try typing this out in your IDE, you'll notice that it does, for the most part, work - until you reach the point where you're trying to define default values on the optional properties.
And the tour guide points you to a dozen different web pages that all explain ways that you can It's not like I'm trying to migrate from JavaScript to Objective-C, or from JavaScript to C++. While you're there, you say to your tour guide, "In your language, how do I say 'thank you'?" There are these techniques for doing this in class-based components - but we're not going to switch everything over to class-based components over this one simple issue. But when we do this, we need to define a value for the required property text too. That all said, I'm a dyed in the wool C# programmer and would love to be pulling across the great parts of that to the JS world with TypeScript. It will be written in React. If nothing was passed in (i.e., if the property is runs just fine. I ran into similar things and I just can't be bothered to type stuff out multiple times, it's a waste of effort for the small benefits of type safety at compile time. Someone in the comments will say something like, "Why didn't you just use But I know that I'm not entirely alone in this. Maybe, in the next week or two, I'll realize how silly this whole little journey was. But it won't work for a TS/React With all of your configs disabled/relaxed, you can actually get the above code to run/compile. Specifically, it... Inline Type-Hinting. Our team just began a brand new, "green fields" project. Create React App and TypeScript. What I'm trying to do is, in React/JS, Imagine you travel to another country - one that speaks a language very similar to your own. React acolyte, jack-of-all-(programming)trades, full-stack developer (Great! ... We want type safety for our default props. Let's talk!

The stub of my JS component looks like this:Nothing fancy here. It just kinda feels like an... [NOTE: A few days after this was posted, I came up with an improved/revised method. That's my specialty.) But I appreciate you taking the time to put those examples here.As for the last example you give, the one that deals with functional components, there's a whole section in this article that outlines that approach - and also explains why I did So that's kinda what led to this whole article. In TS, we can infer data types right in the function signature.