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 Specification
The definition of 'CSSPrimitiveValue.getFloatValue' in that specification.
Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support No support (Yes) ? No support ?
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ? (Yes) (Yes) ? ? ? ?

Document Tags and Contributors

 Contributors to this page: Sebastianz
 Last updated by: Sebastianz,