Check if a Date is Tomorrow's date using JavaScript

Check if a Date is Tomorrow's date using JavaScript #

To check if a date is tomorrow's date:

1. Add 1 day to the current date to get tomorrow's date.
2. Use the toDateString() method to compare the dates.
3. If the method returns 2 equal strings, the date is tomorrow's date.

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function isTomorrow(date) {
  const tomorrow = new Date();
  tomorrow.setDate(tomorrow.getDate() + 1);

  // 👇️ Tomorrow's date
  console.log(tomorrow);

  if (tomorrow.toDateString() === date.toDateString()) {
    return true;
  }

  return false;
}

const t = new Date();
t.setDate(t.getDate() + 1);

console.log(isTomorrow(t)); // 👉️ false
console.log(isTomorrow(new Date('2022-01-21'))); // 👉️ false

We created a reusable function that takes a Date object as a parameter and check if the passed in date is tomorrow.

The first thing we did in the function is use the Date() constructor to get the current date.

Once we have the current date, we have to add 1 day to it to get tomorrow's date.

The setDate() method takes a number that represents the day of the month and sets the value on the given Date instance.

Now that we have tomorrow's date, all we have to do is compare the date to the passed in date, ignoring the time.

The toDateString method returns the date portion of a Date object in human-readable form.

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// 👇️ Tue Jan 25 2022
console.log(new Date().toDateString());

If the method returns the same string for tomorrow's date and the passed in date, then the passed in date is tomorrow's date.