Destructuring objects - how do this code calculate the str length we are not using str.length?

[codename11]

This is how i explained to another camper on another post:

@codename11

is the same as:

standard:

const len = str.length;

In first example, you’re assigning len a value of a property length of the string named ‘str’. Thus when you assign str, it finds its length. And how you’re gonna check that? Here’s how: Instead of using string str put some other string in function with its own, different value and console log it.

standard:

function getLength(str) {
  "use strict";
var ttt="ojha";//another string
  // change code below this line
  const {length : len}=ttt;//find a length of string
  console.log(len); //display it at console
  return len; // you must assign length to len in line

}