We're looking for a user researcher to understand the needs of developers and designers. Is this you or someone you know? Check out the post: https://mzl.la/2IGzdXS


The CSSStyleDeclaration.getPropertyPriority() method interface returns a DOMString that provides all explicitly set priorities on the CSS property.


var priority = style.getPropertyPriority(property);


  • property is a DOMString representing the property name to be checked.

Return value

  • priority is a DOMString that represents the priority (e.g. "important") if one exists. If none exists, returns the empty string.


The following JavaScript code checks whether margin is marked as important in a CSS selector rule:

var declaration = document.styleSheets[0].cssRules[0].style;
var isImportant = declaration.getPropertyPriority('margin') === 'important';


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

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

Document Tags and Contributors

Contributors to this page: Youssef-Belmeskine, bunnybooboo, Qantas94Heavy
Last updated by: Youssef-Belmeskine,