Why you need to Get first and last date of last month in Javascript?
Getting the first and last date of the last month in Javascript is a useful task that is required in many web applications. In various scenarios, you may need to fetch data for the last month or display the date range of the previous month on your website. For example, if you are working on a billing application, you may need to generate invoices for the previous month. In such cases, having the first and last date of the last month can be very handy.
Using Javascript, you can easily fetch the first and last date of the previous month and use them in your application’s logic. You can even customize the date format based on your requirements. In the next section, we will discuss how you can get the first and last date of the last month in Javascript.
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Simple and efficient ways to get first and last date of last month in Javascript
If you ever need to get the first and last date of the previous month in your javascript code, there are several simple and efficient ways to achieve this:
- Using the Date constructor:
const today = new Date();
const lastMonth = new Date(today.getFullYear(), today.getMonth() - 1, 1);
const firstDay = new Date(lastMonth.getFullYear(), lastMonth.getMonth(), 1);
const lastDay = new Date(lastMonth.getFullYear(), lastMonth.getMonth() + 1, 0);
const lastMonthStart = moment().subtract(1, 'months').startOf('month');
const lastMonthEnd = moment().subtract(1, 'months').endOf('month');
const lastMonthStart = dayjs().subtract(1, 'month').startOf('month');
const lastMonthEnd = dayjs().subtract(1, 'month').endOf('month');
Choose the one that fits your needs and coding style best.
Using Moment JS to get First and Last date of last month in Javascript
Moment.js is a powerful library for handling dates in JavaScript. Using Moment.js, you can easily manipulate dates and perform various operations on them. In this post, we’ll see how we can use Moment.js to get the first and last date of the last month in JavaScript.
To get the first date of the last month, we can use the `startOf()` and `subtract()` methods of Moment.js. Here’s how it can be done:
const lastMonthFirstDate = moment().subtract(1, 'month').startOf('month').toDate();
In the above code, we are subtracting one month from the current date using the `subtract()` method. We then use the `startOf()` method to get the first day of the month. Finally, we convert the moment object to a JavaScript Date object using the `toDate()` method.
Similarly, to get the last date of the last month, we can use the `endOf()` and `subtract()` methods of Moment.js. Here’s how it can be done:
const lastMonthLastDate = moment().subtract(1, 'month').endOf('month').toDate();
In this code, we are again subtracting one month from the current date using the `subtract()` method. We then use the `endOf()` method to get the last day of the month. Finally, we convert the moment object to a JavaScript Date object using the `toDate()` method.
Using Moment.js, we can easily get the first and last date of the last month in JavaScript. This can be useful in various scenarios where we need to perform operations on dates.
How to get last month’s first and last date in Javascript using date objects?
In Javascript, we can use the Date object to get the first and last date of the previous month. Below is a function that accepts a new Date object and returns an object of the first and last date of the previous month:
function getLastMonthDates(date) {
// Get the current month and subtract 1 to get the previous month
const month = date.getMonth() - 1;
// Create a new date object with the previous month and year
const year = date.getFullYear();
const lastMonth = new Date(year, month, 1);
// Move to the last day of the previous month
lastMonth.setMonth(lastMonth.getMonth() + 1);
lastMonth.setDate(lastMonth.getDate() - 1);
// Retrieve the first day of the previous month
const firstMonth = new Date(year, month, 1);
return { firstMonth, lastMonth };
}
// Usage
const today = new Date();
const { firstMonth, lastMonth } = getLastMonthDates(today);
console.log(firstMonth); // Output: [last month's first date]
console.log(lastMonth); // Output: [last month's last date]
Using this function, we can easily get the first and last date of the previous month in Javascript.
Steps to retrieve first and last date of last month using Javascript Array methods
Retrieving the first and last date of the last month using Javascript array methods is a handy technique for developers who work with date-related data. Here are the steps to do it:
- Create a new Date object and set it to the current date.
- Use the
setMonth()method to set the month of the Date object to the previous month. - Create a new Date object and set it to the first day of the month using the
setDate()method. - Use the
getDate()method to retrieve the date number of the first day of the month and save it to a variable. - Create a new Date object and set it to the last day of the month using the
setDate()andgetMonth()methods. - Use the
getDate()method to retrieve the date number of the last day of the month and save it to a variable.
With these steps, you can easily retrieve the first and last date of the last month, which can come in handy while working with date ranges and calculations.
Exploring Important Javascript Methods to Retrieve Dates
When working with dates in JavaScript, there are several important methods that can be used to retrieve and manipulate them. Here are a few:
Date()– This method returns the current date and time.getFullYear()– This method retrieves the year from a date object.getMonth()– This method retrieves the month from a date object. Note that the month is zero-indexed (i.e. January is 0, February is 1, etc.).getDate()– This method retrieves the day of the month from a date object.getDay()– This method retrieves the day of the week from a date object. Note that the day of the week is also zero-indexed (i.e. Sunday is 0, Monday is 1, etc.).getTime()– This method retrieves the number of milliseconds since January 1, 1970 (also known as the Unix Epoch).
By using these methods, you can easily retrieve and manipulate dates in your JavaScript code.
Best Practices for Getting First and Last Date of last month in Javascript
In Javascript, it can be tricky to get the first and last date of the previous month. However, by following these best practices, you can easily obtain these values:
- First, create a new date object for the current date:
const currentDate = new Date();const year = currentDate.getMonth() === 0 ? currentDate.getFullYear() - 1 : currentDate.getFullYear();
const month = currentDate.getMonth() === 0 ? 11 : currentDate.getMonth() - 1;const firstDay = new Date(year, month, 1);const lastDay = new Date(year, month + 1, 0);By following these best practices, you can easily obtain the first and last dates of the previous month in Javascript.
