In JavaScript, the moment library is a popular choice for working with dates and times. When working with date objects, you might need to check if a moment object falls within a specific decade. This can be useful when you want to filter or manipulate date data based on decades.

Here’s an example of how you can check if a moment object falls within a specific decade:

Getting the decade of a moment object

Before checking if a moment object falls within a specific decade, you need to extract the decade information from the moment object. The moment library provides several methods to retrieve different parts of a date, including the year component.

To get the decade of a moment object, you can use the .year() method to obtain the year value, and then do some simple math to calculate the corresponding decade.

const momentObj = moment(); // Use your `moment` object here
const year = momentObj.year();
const decade = Math.floor(year / 10) * 10;

In this example, the momentObj represents your moment object. The year variable stores the year component of the moment object. The decade variable calculates the decade by rounding down the year to the nearest multiple of 10.

Checking if a moment object falls within a specific decade

Once you have the decade value of the moment object and the desired decade you want to check against, you can compare them to determine if it falls within the specific decade.

const momentObj = moment(); // Use your `moment` object here
const year = momentObj.year();
const decade = Math.floor(year / 10) * 10;
const desiredDecade = 1990; // The desired decade you want to check against

if (decade >= desiredDecade && decade < desiredDecade + 10) {
  console.log('The moment object falls within the specified decade');
} else {
  console.log('The moment object does not fall within the specified decade');
}

In this example, the desiredDecade variable represents the decade you want to check against. The if statement compares the calculated decade value of the moment object with the desired decade. If it falls within the specified decade, it will log a corresponding message.

Conclusion

By extracting the decade information from a moment object and comparing it to a desired decade, you can easily check if the moment object falls within a specific decade. This can be useful for various tasks such as filtering or manipulating dates based on decades.