date.isBefore()

The isBefore method evaluates whether the current NepaliDate instance occurs earlier in time than another provided date. It takes into account both date and time components down to millisecond accuracy.

ImportCopy Anchor Link

import { NepaliDate } from "nepali-date-library";

SignatureCopy Anchor Link

isBefore(date: NepaliDate): boolean;

ParametersCopy Anchor Link

Return ValueCopy Anchor Link

• Type: boolean
• Returns true if the current date and time precedes the provided date in absolute time; otherwise returns false.

PrecisionCopy Anchor Link

Comparison is evaluated down to the exact millisecond using the underlying Unix timestamp:

this.timestamp.getTime() < date.timestamp.getTime()

ExamplesCopy Anchor Link

Chronological ComparisonCopy Anchor Link

import { NepaliDate } from "nepali-date-library";

const date1 = new NepaliDate("2081-01-15");
const date2 = new NepaliDate("2081-01-20");

console.log(date1.isBefore(date2)); // true
console.log(date2.isBefore(date1)); // false

Time-Level ComparisonCopy Anchor Link

import { NepaliDate } from "nepali-date-library";

const morning = new NepaliDate("2081-01-15").startOfDay();
const evening = new NepaliDate("2081-01-15").endOfDay();

console.log(morning.isBefore(evening)); // true

RelatedCopy Anchor Link

• date.isAfter(): Check if a date succeeds another.
• date.isEqual(): Check if calendar dates are identical.
• date.isSame(): Check equality by specific unit (year, month, day).