CSSPrimitiveValue

在此页

特性
方法
规范
浏览器兼容性
另请参阅
相关话题

CSSPrimitiveValue interface derives from the CSSValue interface and represents the current computed value of a CSS property.

This interface represents a single CSS value. It may be used to determine the value of a specific style property currently set in a block or to set a specific style property explicitly within the block. An instance of this interface might be obtained from the getPropertyCSSValue() 方法在 CSSStyleDeclaration 接口。 CSSPrimitiveValue object only occurs in a context of a CSS property.

Conversions are allowed between absolute values (from millimeters to centimeters, from degrees to radians, and so on) but not between relative values. (For example, a pixel value cannot be converted to a centimeter value.) Percentage values can't be converted since they are relative to the parent value (or another property value). There is one exception for color percentage values: since a color percentage value is relative to the range 0-255, a color percentage value can be converted to a number (see also the RGBColor interface).

  <div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveAspectRatio="xMinYMin meet"><a xlink:href="../API/CSSValue" target="_top"><rect x="1" y="1" width="80" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="41" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">CSSValue</text></a><polyline points="81,25  91,20  91,30  81,25" stroke="#D4DDE4" fill="none"/><line x1="91" y1="25" x2="121" y2="25" stroke="#D4DDE4"/><a xlink:href="../API/CSSPrimitiveValue" target="_top"><rect x="121" y="1" width="170" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text  x="206" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">CSSPrimitiveValue</text></a></svg></div>

  a:hover text { fill: #0095DD; pointer-events: all;}

特性

继承的特性来自其父级， CSSValue .

CSSPrimitiveValue.primitiveType 只读


								unsigned short

representing the type of the value. Possible values are:

常量	描述
`CSS_ATTR`	The value is an `attr()` function. The value can be obtained by using the `getStringValue()` 方法。
`CSS_CM`	The value is a `<length>` in centimeters. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_COUNTER`	The value is a counter or counters function. The value can be obtained by using the `getCounterValue()` 方法。
`CSS_DEG`	The value is an `<angle>` in degrees. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_DIMENSION`	The value is a `<number>` with an unknown dimension. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_EMS`	The value is a `<length>` in em units. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_EXS`	The value is a `<length>` in ex units. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_GRAD`	The value is an `<angle>` in grads. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_HZ`	The value is a `<frequency>` in Hertz. The value can be obtained by using the getFloatValue method.
`CSS_IDENT`	The value is an identifier. The value can be obtained by using the `getStringValue()` 方法。
`CSS_IN`	The value is a `<length>` in inches. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_KHZ`	The value is a `<frequency>` in Kilohertz. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_MM`	The value is a `<length>` in millimeters. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_MS`	The value is a `<time>` in milliseconds. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_NUMBER`	The value is a simple `<number>` . The value can be obtained by using the `getFloatValue()` 方法。
`CSS_PC`	The value is a `<length>` in picas. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_PERCENTAGE`	The value is a `<percentage>` . The value can be obtained by using the `getFloatValue()` 方法。
`CSS_PT`	The value is a `<length>` in points. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_PX`	The value is a `<length>` in pixels. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_RAD`	The value is an `<angle>` in radians. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_RECT`	The value is a `rect()` function. The value can be obtained by using the `getRectValue()` 方法。
`CSS_RGBCOLOR`	The value is an `<color>` . The value can be obtained by using the `getRGBColorValue()` 方法。
`CSS_S`	The value is a `<time>` in seconds. The value can be obtained by using the `getFloatValue()` 方法。
`CSS_STRING`	The value is a `<string>` . The value can be obtained by using the `getStringValue()` 方法。
`CSS_UNKNOWN`	The value is not a recognized CSS2 value. The value can only be obtained by using the `cssText` 属性。
`CSS_URI`	The value is a `<uri>` . The value can be obtained by using the `getStringValue()` 方法。

方法

CSSPrimitiveValue.getCounterValue(): This method is used to get the counter value. If this CSS value doesn't contain a counter value, a DOMException is raised. Modification to the corresponding style property can be achieved using the Counter 接口。
CSSPrimitiveValue.getFloatValue(): This method 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 被引发。
CSSPrimitiveValue.getRGBColorValue(): This method is used to get the RGB color. If this CSS value doesn't contain a RGB color value, a DOMException is raised. Modification to the corresponding style property can be achieved using the RGBColor 接口。
CSSPrimitiveValue.getRectValue(): This method is used to get the Rect value. If this CSS value doesn't contain a rect value, a DOMException is raised. Modification to the corresponding style property can be achieved using the Rect 接口。
CSSPrimitiveValue.getStringValue(): This method is used to get the string value. If the CSS value doesn't contain a string value, a DOMException 被引发。
CSSPrimitiveValue.setFloatValue(): A method to set the float value with a specified unit. If the property attached with this value can not accept the specified unit or the float value, the value will be unchanged and a DOMException 会被引发。
CSSPrimitiveValue.setStringValue(): A method to set the string value with the specified unit. If the property attached to this value can't accept the specified unit or the string value, the value will be unchanged and a DOMException 会被引发。

规范

规范	状态	注释
Document Object Model (DOM) Level 2 Style Specification The definition of 'CSSPrimitiveValue' in that specification.	过时	初始定义

浏览器兼容性

The compatibility table on 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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`CSSPrimitiveValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`getCounterValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`getFloatValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`getRectValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`getRGBColorValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`getStringValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`primitiveType` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`setFloatValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No
`setStringValue` 弃用	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 ? — 62	IE ?	Opera 不支持 No	Safari ?	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 4 — 62	Opera Android ?	Safari iOS ?	Samsung Internet Android 不支持 No

在此页

特性

方法

规范

浏览器兼容性

图例

另请参阅

元数据

相关话题