How can I detect CSS property changes in jQuery?

Detecting CSS Property Changes with jQuery

In JavaScript, you can detect changes to an element's CSS properties using the Mutation Events present in DOM L2 Events module. One of these events, DOMAttrModified, specifically monitors changes to element attributes, including style attributes.

To use this event in jQuery, simply attach an event listener to the element you wish to monitor. For instance:

<code class="js">$("element").on("DOMAttrModified", function(e) {
  if (e.attrName === "style") {
    console.log("Style changed: ", e.prevValue, " -> ", e.newValue);
  }
});</code>

This code will log the previous and new CSS styles whenever the "style" attribute of the element is modified.

Alternatives

If DOMAttrModified is not supported in the browser you're targeting, an alternative approach is to use the "propertychange" event available in Internet Explorer. This event can also detect style changes.

Note

It's important to note that Mutation Events, including DOMAttrModified, have been deprecated. Instead, the use of MutationObserver is recommended for monitoring DOM changes, including CSS property changes.

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