How do I create an array of the previous 31 days using Moment.js?

December 6, 2021

Using moment.js I’m trying to generate an array of the previous 31 days in a particular moment.js format. This is my current code:

let labels = [];
const popArray = () => {
    let nowMonth: any = moment().format('D');
    let newMonth = parseInt(nowMonth);
    let startMonth = newMonth - 31;
    for(let i = startMonth; i < newMonth; i++){
        labels.push(moment().day(i).format('MM-DD'));
    }
    console.log(labels)
}
popArray();

When I run this code I get an array of 31 days, the first being "11-10" and the last being "12-10". Why is this? I’ve tried different configurations where startMonth is "-31" and newMonth is "0" but it still doesn’t work.

>Solution :

You can simply using the subtract method like this:

let labels = [];
    const popArray = () => {
        for (let i = 0; i <= 31; i++){
            labels.push(moment().subtract(i, "days").format('MM-DD'))
        }
        console.log(labels)
    }
popArray();