JavaScript Date valueOf()
Example
Get the primitive value of a date object:
const d = new Date();
let ms = d.valueOf();
Try it Yourself »
Definition and Usage
The valueOf() method returns the primitive value of a date object.
Note: The primitive value is returned as the number of millisecond since midnight January 1, 1970 UTC.
Browser Support
valueOf() is an ECMAScript1 (ES1) feature.
ES1 (JavaScript 1997) is fully supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes | Yes |
Syntax
Date.valueOf()
Parameters
| None |
Technical Details
| Return Value: | A Number, representing the number of milliseconds between the date object and midnight January 1, 1970 UTC |
|---|---|
| JavaScript Version: | ECMAScript 1 |
