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CSSPrimitiveValue.setFloatValue() - Web APIs 编辑

The setFloatValue() method of the CSSPrimitiveValue interface is used to set a float value. If the property attached to this value can't accept the specified unit or the float value, the value will be unchanged and a DOMException will be raised.

Syntax

cssPrimitiveValue.setFloatValue(unitType, floatValue);

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.

floatValue

A float representing the new float value.

Return value

Void.

Exceptions

Type	Description
`DOMException`	An `INVALID_ACCESS_ERR` is raised if the CSS value doesn't contain a float value or if the string value can't be converted into the specified unit. An NO_MODIFICATION_ALLOWED_ERR is raised if this property is read-only.

Specifications

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