Discussion on: JavaScript object destructuring usages you must know

[Jon Randy 🎖️]

const str = 'Kumquat'
const {length, [length-1]:last} = str

console.log(length) // 7
console.log(last) // 't'

[Tapas Adhikary]

Mindblowing. Thanks, John for sharing.

[Stefan Grbic]

I was playing a bit with at(), but it's not supported in all browsers.

const str = 'Kumquat'
const {length, last = str.split('').at(-1) } = str;

console.log(length) // 7
console.log(last) // 't'