ES6: Use Destructuring Assignment to Assign Variables from Arrays question

JavaScript
1

I have this code here:

let a = 8, b = 6;
(() => {
  "use strict";
  // change code below this line
  const [a, b] = [b, a]
  // change code above this line
})();
console.log(a); // should be 6
console.log(b); // should be 8

My question is, how a and b enter the function?

2

They are global variables

You need to use destructuring of the global variables, if you use const you are making the variables local, and that doesn’t invert the global ones

1 Like
3

Thanks for the answer.