Detonate your deadline dilemmas with the .diff() function in Moment.js:
// Whoever said time was relative didn't use Moment.js!const diffHours = moment(endDate).diff(moment(startDate), 'hours');
console.log(diffHours); // The whole hours difference, laid bare.
However, for those fractional needs, duration objects have gotten your back with their .asHours() method:
// Who needs a fraction when you can have the whole pie?const duration = moment.duration(moment(endDate).diff(moment(startDate)));
const diffFractionalHours = duration.asHours();
console.log(diffFractionalHours); // Harvest the decimals, reap the precision!
Juggle with time zones
Playing multi-time zone hopscotch? Moment Timezone is here for the rescue:
// New York, LA, and a cup of Moment Timezone flavored Java(script)!let startDate = moment.tz("2023-05-25 12:00", "America/New_York");
let endDate = moment.tz("2023-05-26 16:00", "America/Los_Angeles");
let diffHours = endDate.diff(startDate, 'hours');
console.log(diffHours); // Time zones? More like boring zones!
Time travel with fromNow() and from()
Unshackle the chains of calendar with fromNow() or from() for past date calculations:
// Because, who wouldn't want a time-machine!let pastDate = moment("2023-01-01");
console.log(pastDate.fromNow()); // Relive the nostalgia!
However, for traditional hour difference calculations for past dates, stick with our trusty .diff() and .asHours():
// Let's go back to the future, shall we!let pastDate = moment("2023-01-01");
let diffHours = moment().diff(pastDate, 'hours');
console.log(diffHours); // Tempus fugit, but not in our console.
Chain of methods
Because why write two lines of code, when one suffices?
// Coding efficiency for .diff(), at a coffee shop near you!let hoursDifference = moment(endDate).subtract(1, 'days').diff(moment(startDate), 'hours');
// Day subtracted, hour difference calculated, job application sent!
Code like a Pro
Display dates your way
With .format(), you're the Picasso of date presentation:
// Why do today what you can .format() for tomorrow.console.log(endDate.format('MMMM Do YYYY, h:mm:ss a')); // "May 26th 2023, 4:00:00 pm"
Daylight Saving Time (DST)
Because we all need that extra hour of sleep:
// Because, who really understands DST? (Correct answer: Moment JS!)let startDSTDate = moment('2023-03-13T02:00:00-0400');
let endDSTDate = moment('2023-03-13T03:00:00-0400');
let diffDSTHours = endDSTDate.diff(startDSTDate, 'hours');
console.log(diffDSTHours); // Just another DST miracle!
Clear names improve code understanding and reduce forehead wrinkles:
// Code reluctant to age, with variable Botox!let meetingStart = moment('2023-06-01T09:00:00');
let meetingEnd = moment('2023-06-01T17:00:00');
let meetingDurationHours = meetingEnd.diff(meetingStart, 'hours');
console.log(meetingDurationHours); // Your 9 to 5, in console log!
