Check if Date Is Valid

Introduction

In this lab, we will explore a JavaScript function that checks whether a given date is valid or not. The function uses the spread operator and the Date constructor to create a new Date object from the given arguments. It then uses the valueOf() method and Number.isNaN() to check if the object is valid. This lab is a great opportunity to practice working with JavaScript functions and date objects.

How to Check if a Date Is Valid

To check if a date is valid, follow these steps:

1. Open the Terminal/SSH and type node to start practicing coding.
2. Use the spread operator (...) to pass the array of arguments to the Date constructor.
3. Use Date.prototype.valueOf() and Number.isNaN() to check if a valid Date object can be created from the given values.

Here's an example code snippet:

const isDateValid = (...val) => !Number.isNaN(new Date(...val).valueOf());

You can test the function with different values, as shown below:

isDateValid("December 17, 1995 03:24:00"); // true
isDateValid("1995-12-17T03:24:00"); // true
isDateValid("1995-12-17 T03:24:00"); // false
isDateValid("Duck"); // false
isDateValid(1995, 11, 17); // true
isDateValid(1995, 11, 17, "Duck"); // false
isDateValid({}); // false

Summary

Congratulations! You have completed the Check if Date Is Valid lab. You can practice more labs in LabEx to improve your skills.