What is the best way to calculate the number of days between today's date and the end of the current month using Moment.js?

Question

What is the best way to calculate the number of days between today's date and the end of the current month using Moment.js?

Here's the current code snippet I am working with:

  const moment = require('moment')
    const m = moment


    const currDay = m().format('D')
    const dayOfWeek = m().format('dddd')
    const daysInMonth = m().daysInMonth()

    const startOfMonth = moment().startOf('month').format('YYYY-MM-DD hh:mm');
    const endOfMonth   = moment().endOf('month').format('YYYY-MM-DD hh:mm');

I'm looking to generate a calendar row that starts with today's date and displays the remaining days in the month so I can showcase each day using Vue.js in my HTML.

For instance: Wed 8, Thu 9, Fri 10... Fri 31.

javascript arrays vue.js date momentjs

Answer 1

Answer №1

It seems like the original poster might be getting caught up in the common pitfall of formatting too early. While it's helpful to format data for better readability during development, doing so prematurely can result in a string that is not suitable for further calculations.

One approach is to work with date objects directly and only convert them to strings when necessary for (a) human consumption or (b) storage and transmission purposes.

Let's continue working without any premature formatting...

const daysRemainingThisMonth = moment().endOf('month').diff(moment(), 'days');
console.log(`There are ${daysRemainingThisMonth} days remaining this month`)

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

Answer 2

It seems like the original poster might be getting caught up in the common pitfall of formatting too early. While it's helpful to format data for better readability during development, doing so prematurely can result in a string that is not suitable for further calculations.

One approach is to work with date objects directly and only convert them to strings when necessary for (a) human consumption or (b) storage and transmission purposes.

Let's continue working without any premature formatting...

const daysRemainingThisMonth = moment().endOf('month').diff(moment(), 'days');
console.log(`There are ${daysRemainingThisMonth} days remaining this month`)

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

Answer 3

Answer №2

If you're looking for a way to calculate the difference in days between two dates, you can utilize a function that returns the last day of the month and find the variance between the dates.

function getMonthEnd(date = new Date()) {
  return new Date(date.getFullYear(), date.getMonth() + 1, 0);
}

function getMonthDaysLeft(date = new Date()) {
  return getMonthEnd(date).getDate() - date.getDate();
}
  
let d = new Date();
console.log(`There are ${getMonthDaysLeft(d)} days left in ${d.toLocaleString('en',{month:'long'})}.`);

If you need a list or array of remaining days, you can iterate over a date one day at a time and store the formatted dates in the desired format:

function getMonthDaysLeftAsList(date = new Date()) {
  let d = new Date(+date);
  // Formatter
  let f = new Intl.DateTimeFormat('en',{
    day: 'numeric',
        month: 'short'
      });
  let m = d.getMonth();
  let dayList = [];
  while (d.getMonth() == m) {
    dayList.push(f.format(d));
    d.setDate(d.getDate() + 1);
  }
  return dayList;
}

console.log(getMonthDaysLeftAsList());

Answer 4

If you're looking for a way to calculate the difference in days between two dates, you can utilize a function that returns the last day of the month and find the variance between the dates.

function getMonthEnd(date = new Date()) {
  return new Date(date.getFullYear(), date.getMonth() + 1, 0);
}

function getMonthDaysLeft(date = new Date()) {
  return getMonthEnd(date).getDate() - date.getDate();
}
  
let d = new Date();
console.log(`There are ${getMonthDaysLeft(d)} days left in ${d.toLocaleString('en',{month:'long'})}.`);

If you need a list or array of remaining days, you can iterate over a date one day at a time and store the formatted dates in the desired format:

function getMonthDaysLeftAsList(date = new Date()) {
  let d = new Date(+date);
  // Formatter
  let f = new Intl.DateTimeFormat('en',{
    day: 'numeric',
        month: 'short'
      });
  let m = d.getMonth();
  let dayList = [];
  while (d.getMonth() == m) {
    dayList.push(f.format(d));
    d.setDate(d.getDate() + 1);
  }
  return dayList;
}

console.log(getMonthDaysLeftAsList());

What is the best way to calculate the number of days between today's date and the end of the current month using Moment.js?

Answer №1

Answer №2

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