Moment JS seemingly returning random date - react-native

Question

Moment JS is returning a random date.
I am trying to create a calendar in a react-native project. I created this loop to count back the days from today's date. I have attached my console and tried to clearly show how I tried to debug this.
The subtract method seems not to recognise the loop and the i value seems to stay at 16.
Any help would be greatly appreciated.
This is the code that is causing all the fussThis is the output in the console

Answer 1

Per Moment.js, moments are mutable. Clone the moment before performing date math
https://momentjs.com/guides/#/lib-concepts/mutability/
You'll need to create a new moment instance or clone the existing one when performing operations like .add(), .subtract(), etc.
const moment = require("moment");
const today = moment();
// count back N days
const N = 3;
let i = 1;
let days = [];
// #1 - Create a new moment instance from today and add -i days
while (i <= N) {
const day = moment(today).add(-i, "days");
days.push(day);
i++;
}
console.log("Approach #1");
console.log({ days });
// #2 - A moment is mutable. So we use add() to mutate today by -1 days each iteration, clone the instance, and push to array
i = 0;
days = [];
while (i < N) {
const day = today.add(-1, "days").clone();
days.push(day);
i++;
}
console.log("Approach #2");
console.log({ days });