The valueOf()
method returns the primitive value of a Date
object.
Syntax
dateObj.valueOf()
Return value
The number of milliseconds between 1 January 1970 00:00:00 UTC and the given date.
Description
The valueOf()
method returns the primitive value of a Date
object as a number data type, the number of milliseconds since midnight 01 January, 1970 UTC.
This method is functionally equivalent to the Date.prototype.getTime()
method.
This method is usually called internally by JavaScript and not explicitly in code.
Examples
Using valueOf()
var x = new Date(56, 6, 17); var myVar = x.valueOf(); // assigns -424713600000 to myVar
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Date.prototype.valueOf' in that specification. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
valueOf | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 4 | Opera Full support 3 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.1.100 |
Legend
- Full support
- Full support