I'm not going to have a discussion about what you think should be emphasized. Everything I mentioned is correct. This is just a quick cheatsheet. They're not supposed to include everything.
Think about others before you comment, please. If you have a suggestion for me, fine. You can send me a message directly and we can talk about it, but there's no need to clutter up what is a cheatsheet for beginners with multiple paragraphs worth of opinions about how the article should be written.
Thanks very much for the article (and entire series), it's a great hooks-first treatment for learning React now. I'm just about to embark on my first React project but have pretty extensive experience in other languages and all the way down to the metal in terms of assembly coding. React is quite a different paradigm to what I'm used to but I'm really interested and excited by it.
The useCallback description did have me scratching my head - I really couldn't see how the performance hit of defining (not calling) an inline function would be that bad in your example when that component re-renders - the rest of the code uses arrow functions a lot which is basically short-hand for the same thing after all.
Kevin's comment did really clear things up for me - I can absolutely see a performance issue when wanting to pass on a callback as a prop to a child component, and how useCallback can therefore prevent those children from re-rendering. The name also makes more sense in that context.
I don't want to add to unnecessary clutter but wanted to add my perspective as someone with coding experience but new to React, and thank Kevin for clearing up the one aspect that was confusing me in the post.
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I'm not going to have a discussion about what you think should be emphasized. Everything I mentioned is correct. This is just a quick cheatsheet. They're not supposed to include everything.
Think about others before you comment, please. If you have a suggestion for me, fine. You can send me a message directly and we can talk about it, but there's no need to clutter up what is a cheatsheet for beginners with multiple paragraphs worth of opinions about how the article should be written.
Hi Reed,
Thanks very much for the article (and entire series), it's a great hooks-first treatment for learning React now. I'm just about to embark on my first React project but have pretty extensive experience in other languages and all the way down to the metal in terms of assembly coding. React is quite a different paradigm to what I'm used to but I'm really interested and excited by it.
The useCallback description did have me scratching my head - I really couldn't see how the performance hit of defining (not calling) an inline function would be that bad in your example when that component re-renders - the rest of the code uses arrow functions a lot which is basically short-hand for the same thing after all.
Kevin's comment did really clear things up for me - I can absolutely see a performance issue when wanting to pass on a callback as a prop to a child component, and how useCallback can therefore prevent those children from re-rendering. The name also makes more sense in that context.
I don't want to add to unnecessary clutter but wanted to add my perspective as someone with coding experience but new to React, and thank Kevin for clearing up the one aspect that was confusing me in the post.