JavaScript Date.now()

Why Date.now ?

If we only want to measure the difference, we don’t need the Date object. There’s a special method Date.now() that returns the current timestamp.

It is semantically equivalent to new Date().getTime(), but it doesn’t create an intermediate Date object. So it’s faster and doesn’t put pressure on garbage collection. It is used mostly for convenience or when performance matters, like in games in JavaScript or other specialized applications.

Syntax:

Date.now()

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JavaScript Date.now Examples

Example 1

        let minutes = 1000 * 60;
        let hours = minutes * 60;
        let days = hours * 24;
        let years = days * 365;
        let date = Date.now();

        let print = Math.round(date / years);
        console.log(print)

output:

49

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Example 2

        // 1970 - 2019 
        let millisecond = Date.now();
        console.log(millisecond)

output:

1549391459096

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Example 3

        var date = Date();

        a = date.toString()

        console.log("Date: " + date)

output:

Date: Tue Feb 05 2019 21:32:50 GMT+0300 (Arabia Standard Time)

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Sources:

• https://www.geeksforgeeks.org
• https://developer.mozilla.org
• https://www.w3schools.com
• https://javascript.info

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Browser Support

Chrome	5
Edge	yes
Firefox	3
Internet Explorer	9
Opera	10.5
Safari	4
Android webview	yes
Chrome for Android	yes
Edge mobile	yes
Firefox for Android	4
Opera Android	yes