In JavaScript, a timestamp is a numeric representation of the current time. It is a unique identifier that marks the exact moment when an event occurred or when a certain action was performed. This timestamp is useful in various applications such as logging, debugging, or measuring time intervals. In this article, we will explore different approaches to getting a timestamp in JavaScript.
Syntax: There are different ways to get a timestamp in JavaScript. Here is the syntax of some common methods:
Using Date.now() method: This method returns the number of milliseconds since January 1, 1970, 00:00:00 UTC. It is a static method of the Date object and is widely supported by modern browsers.
var timestamp = Date.now();
Using new Date().getTime() method: This method also returns the number of milliseconds since January 1, 1970, 00:00:00 UTC. It is an instance method of the Date object and is equivalent to calling the valueOf() method.
var timestamp = new Date().getTime();
Using new Date().valueOf() method: This method returns the primitive value of a Date object, which is the number of milliseconds since January 1, 1970, 00:00:00 UTC.
var timestamp = new Date().valueOf();
Example 1: Using Date.now() method
HTML
<!DOCTYPE html> <html> <head> <title>Timestamp Example</title> </head> <body> <center> <h1 style="color:green"> GeeksForGeeks </h1> <p id="demo"></p> </center> <script> var timestamp = Date.now(); document.getElementById("demo").innerHTML = "Timestamp: " + timestamp; </script> </body> </html> |
Output:
Example 2: Using new Date().getTime() method
HTML
<!DOCTYPE html> <html> <head> <title>Timestamp Example</title> </head> <body> <center> <h1 style="color:green"> GeeksForGeeks </h1> <p id="demo"></p> </center> <script> var timestamp = new Date().getTime(); document.getElementById("demo").innerHTML = "Timestamp: " + timestamp; </script> </body> </html> |
Output:
Conclusion: In this article, we have discussed different approaches to getting a timestamp in JavaScript. We have seen how to use the Date.now() method, new Date().getTime() method, and new Date().valueOf() method to get a timestamp. The examples have shown how to use these methods in HTML code to display the timestamp on a webpage. Timestamps are useful in many programming scenarios, and JavaScript provides several easy-to-use methods to generate them.
