I'm new to React and I often see the usage of React's useState like the following line:
setComment && setComment('Comment');
Why would you do that with the same useState function?
Thanks in advance!
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_AND – 0stone0 Jan 20 '22 at 10:32
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Does this answer your question? [What does this symbol mean in JavaScript?](https://stackoverflow.com/questions/9549780/what-does-this-symbol-mean-in-javascript) – 0stone0 Jan 20 '22 at 10:32
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if `setComment` is a state function then `setComment && setComment(x)` is pointless unless you have somehow unset the function to be undefined/null etc as it should always be a function and therefore checking it's existence is not needed – andy mccullough Jan 20 '22 at 10:34
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This is more of a JavaScript question rather than a React question. Basically what this does is it ensures that setComment is defined before trying to call it. – Dimitar Jan 20 '22 at 10:36
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Yes, but the OP specifically mentions react state function – andy mccullough Jan 20 '22 at 10:38
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@0stone0 It helps a bit but not in React's context and it doesn't answer the question why you would do such a thing with the same state function. Nevertheless, thanks! – Reut Jan 20 '22 at 17:25
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@DimitarVeljanovski I get the point thanks! – Reut Jan 20 '22 at 17:26
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@andymccullough Your answer perfectly answers my question, thanks a lot! – Reut Jan 20 '22 at 17:27