How Can I Access the Computed Style of an Element in a Cross-Domain Iframe?

Accessing Element's Computed Style in Cross-Domain Iframes

You wish to obtain the computed style values for an element within a cross-domain iframe. This element's style information is not directly accessible due to cross-origin restrictions.

To overcome this limitation, you can utilize the window.getComputedStyle() method. This method is available in browsers like Firefox, Opera, and Safari, and it allows you to retrieve the computed styles for an element.

Usage:

const element = document.getElementById("frameId");
const computedStyle = window.getComputedStyle(element);
const height = computedStyle.getPropertyValue("height");
const width = computedStyle.getPropertyValue("width");

The above code will retrieve the computed height and width for the element inside the iframe with the id "frameId."

Note:

The currentStyle property can be used in IE to access the computed style, but it's worth noting that different browsers return different objects for the computed style.

If you desire to retrieve the computed style for the contents of the iframe, you'll need to navigate into the iframe's DOM and apply the same technique to its document.

The above is the detailed content of How Can I Access the Computed Style of an Element in a Cross-Domain Iframe?. For more information, please follow other related articles on the PHP Chinese website!