JSFiddle - React, Tailwind, and code Playground

JavaScript

let arr = [
 	{val:"a"},
  {val:"b"}
];

//let [{val:res}] = arr; //res contains 'a'
//let [...res] = arr; //res contains all objects
let [...{val:res}] = arr; //res = undefined
//let [...{length:res}] = arr; //res= 2

console.log(res);