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.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';
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleDeclaration/getPropertyPriority