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Summary

CSSStyleDeclaration represents a collection of CSS property-value pairs. It is used in a few APIs:

Attributes

CSSStyleDeclaration.cssText
Textual representation of the declaration block. Setting this attribute changes the style.
CSSStyleDeclaration.length Read only
The number of properties. See the item() method below.
CSSStyleDeclaration.parentRule Read only
The containing CSSRule.

Methods

CSSStyleDeclaration.getPropertyPriority()
Returns the optional priority, "important".
CSSStyleDeclaration.getPropertyValue()
Returns the property value given a property name.
CSSStyleDeclaration.item()
Returns a property name.
CSSStyleDeclaration.removeProperty()
Removes a property from the CSS declaration block.
CSSStyleDeclaration.setProperty()
Modifies an existing CSS property or creates a new CSS property in the declaration block/.
CSSStyleDeclaration.getPropertyCSSValue()
Only supported via getComputedStyle in Firefox. Returns the property value as a CSSPrimitiveValue or null for shorthand properties.

Example

var styleObj = document.styleSheets[0].cssRules[0].style;
console.log(styleObj.cssText);

for (var i = styleObj.length; i--;) {
  var nameString = styleObj[i];
  styleObj.removeProperty(nameString);
}

console.log(styleObj.cssText);

Notes

The declaration block is that part of the style rule that appears within the braces and that actually provides the style definitions (for the selector, the part that comes before the braces).

See also

Specifications

Specification Status Comment
CSS Object Model (CSSOM)
The definition of 'CSSStyleDeclaration' in that specification.
Working Draft  
Document Object Model (DOM) Level 2 Style Specification
The definition of 'CSSPrimitiveValue' in that specification.
Recommendation Initial definition

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