What does it means declaring an array as a function in javascript?

Question

This doubt comes from React Hooks Tutorial and it's particulary strange for me:

const [count, setCount] = useState(0);

The order is important when declaring? What name receives this sort of declaration? Since what version of ES this syntax was launched?

Here's another similar question with a useful answer: https://stackoverflow.com/questions/26999820/javascript-object-bracket-notation-navigation-on-left-side-of-assign — Cat, Feb 05 '19 at 19:48

score 1 · Answer 1 · answered Feb 05 '19 at 19:37

1

That's array destructuring. useState returns an array with three values, count will then get the value of the first array entry, setCount of the second and so on.

answered Feb 05 '19 at 19:37

Jonas Wilms

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What does it means declaring an array as a function in javascript?

1 Answers1