how to use the compareasc function from date-fns in javascript

You can use the compareAsc function from date-fns to compare two dates in JavaScript. This function returns an integer value that indicates whether the first date is before, after, or the same as the second date.

Here's an example:

index.tsx
const dateFns = require('date-fns');

const date1 = new Date('2021-01-01');
const date2 = new Date('2021-02-01');

const result = dateFns.compareAsc(date1, date2);

console.log(result);
// Output: -1 (date1 is before date2)
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In this example, we first import the date-fns library using the require function. We then create two Date objects representing date1 and date2.

To compare the two dates, we pass them as arguments to the compareAsc function, which returns -1 to indicate that date1 is before date2.

You can also use this function to compare the current date with another date:

index.tsx
const dateFns = require('date-fns');

const currentDate = new Date();
const futureDate = new Date('2022-01-01');

const result = dateFns.compareAsc(currentDate, futureDate);

if (result === -1) {
  console.log('The current date is before the future date.');
} else if (result === 1) {
  console.log('The current date is after the future date.');
} else {
  console.log('The current date is the same as the future date.');
}
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In this example, we compare the current date with a future date, and use a conditional statement to print a message indicating whether the current date is before, after, or the same as the future date.