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 <var>floatValue</var> = <var>cssPrimitiveValue</var>.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

Example

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

Specifications

Browser compatibility