tl;dr
Custom React hooks can provide a great place to draw a boundary between imperative and declarative code.
In this example, we'll l...
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The only thing thats left is how to verify it with tests that it works. As it is, it will not pass a code review sadly.
Indeed, you are correct good sir. I shall endeavor to improve my TDB (test driven blogging) skills. ;-)
But seriously, you bring up a great point. If learners only read about writing tests in blog articles about testing, it gives credence to the idea that testing is just one additional and possibly optional chore rather than an integral and vital part of the development process.
In order to cover testing, why don't we just take one example and test it thoroughly. Would make for Ann engaging second article!
Done.
dev.to/namick/writing-your-own-rea...
Cheers!
Epic!
The thrills and power you feel when you get the hang of custom hooks... it was quite surreal when you realize you don't need to put 7 useEffects and 16 useStates in a single component :)
And refactoring said components is just.... delicious.
You're totally right, it's an amazing feeling!
Brilliantly explained, thank you!
Thanks, it feels good to know that you like it. :-)
Very good explanation, I need this kind of post related to react hooks ,life cycle method, redux....etc
overreacted.io/a-complete-guide-to...
I very much recommend this post.
Thanks. Do you find yourself needing classes and life cycle methods anymore with hooks now available?
just had to jump down here to say "excellent hero image" 😉
Ha, yes. I just realized that it's especially fitting for this particular example because Captain Hook is relentlessly pursued by a crocodile who has swallowed a ticking clock. :-)
I see you returning setRunningTime. Do useState setFunctions return a value?
I'm not sure if I understand your question, but
React.useStatereturns two values in the form of an array. The first is the state value, which should be treated as immutable and the second is a setter function, which is used to update the state value.More info here: reactjs.org/docs/hooks-state.html
Does the setter function return a value? You know, in addition to setting one
Oh, right. No, it doesn't return a useful value (
undefined). However, it does automagically update the value of the state variable and cause your component to rerender with that new value.