Discussion on "Hooks in React"

Deepansh Bhargava · 2021-05-06T16:43:41.874Z

Today we'll learn about the widely used hooks in React. First, let me tell you the need for hooks. As we all know React has functional and class components. Previously, the functional components were only used to render the data but didn't consist of...

Discussion on "Hooks in React" | Hashnode

Phillip Ninan

Senior Software Engineer

May 7, 2021

Very good read! I am pretty new to react. I was a little confused on the first couple of lines.

const [number, setNumber] = useState(0);

Were number and setNumber defined someplace?

Why do you pass 0 to useState? Then you pass true to it here?

const [isEven, toggleEven] = useState(true);

I look forward to reading more!

Deepansh Bhargava

Software Developer @ HST Solar

May 7, 2021

Thanks for pointing this out.

So the useState hook returns an array consisting of two elements, and we can name these variables as per our need.
The 0 passed in the useState is the initial value of the state variable. I wanted to set the value of number as 0 and as it is even so I have set the value of isEven as true.

Phillip Ninan

Senior Software Engineer

May 7, 2021

Deepansh Bhargava

Ah, that makes sense! Thank you for clearing that up for me Deepansh!

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