Web/API/CSSPrimitiveValue/getFloatValue

The getFloatValue() method of the CSSPrimitiveValue interface is used to get a float value in a specified unit. If this CSS value doesn't contain a float value or can't be converted into the specified unit, a DOMException is raised.

Syntax

var floatValue = cssPrimitiveValue.getFloatValue(unit);

Parameters

unitType

An unsigned short representing the code for the unit type, in which the value should be returned. Valid values are:

Constant	Description
`CSS_CM`	The value is a `<length>` in centimeters.
`CSS_DEG`	The value is an `<angle>` in degrees.
`CSS_DIMENSION`	The value is a `<number>` with an unknown dimension.
`CSS_EMS`	The value is a `<length>` in em units.
`CSS_EXS`	The value is a `<length>` in ex units.
`CSS_GRAD`	The value is an `<angle>` in grads.
`CSS_HZ`	The value is a `<frequency>` in Hertz. The value can be obtained by using the getFloatValue method.
`CSS_IN`	The value is a `<length>` in inches.
`CSS_KHZ`	The value is a `<frequency>` in Kilohertz.
`CSS_MM`	The value is a `<length>` in millimeters.
`CSS_MS`	The value is a `<time>` in milliseconds.
`CSS_NUMBER`	The value is a simple `<number>`.
`CSS_PC`	The value is a `<length>` in picas.
`CSS_PERCENTAGE`	The value is a `<percentage>`.
`CSS_PT`	The value is a `<length>` in points.
`CSS_PX`	The value is a `<length>` in pixels.
`CSS_RAD`	The value is an `<angle>` in radians.
`CSS_S`	The value is a `<time>` in seconds.

Return value

A float value in the specified unit.

Exceptions

Type	Description
`DOMException`	An `INVALID_ACCESS_ERR` is raised if the CSS value doesn't contain a float value or if the float value can't be converted into the specified unit.

Example

var cs = window.getComputedStyle(document.body);
var cssValue = cs.getPropertyCSSValue("margin-top");
console.log(cssValue.getFloatValue(CSSPrimitiveValue.CSS_CM));

Specifications

Specification	Status	Comment
Document Object Model (DOM) Level 2 Style SpecificationThe definition of 'CSSPrimitiveValue.getFloatValue' in that specification.	Obsolete	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getFloatValue` Deprecated'	Chrome No support No	Edge No support No	Firefox No support ? — 62	IE No support No	Opera No support No	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No

Legend

No support: No support
Compatibility unknown: Compatibility unknown
Deprecated. Not for use in new websites.': Deprecated. Not for use in new websites.

CSSPrimitiveValue.getFloatValue() by Mozilla Contributors is licensed under CC-BY-SA 2.5.