Destructuring arrays

const myArr = ['one', 'two', 'three']
const [ a, b, c ] = myArr

// a = 'one', b = 'two, c = 'three'

We can set default value in destructuring array, see the example of Default Value While Destructuring.

With destructuring array, we can swap the values of 2 variables easily:

var a = 1;
var b = 3;

[a, b] = [b, a];
// a = 3, b = 1

We can specify empty slots to skip unneeded values:

[a, , b] = [1, 2, 3] // a = 1, b = 3