PerformanceElementTiming: naturalHeight property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The naturalHeight read-only property of the PerformanceElementTiming interface returns the intrinsic height of the image element.

Value

An unsigned 32-bit integer (unsigned long) which is the intrinsic height of the image if this is applied to an image, 0 for text.

Examples

Logging naturalHeight

In this example an <img> element is being observed by adding the elementtiming attribute. A PerformanceObserver is registered to get all performance entries of type "element" and the buffered flag is used to access data from before observer creation. The image file has a width of 1000px and a height of 750px. Calling entry.naturalHeight returns 750, that being the intrinsic height in pixels.

html
<img
  src="image.jpg"
  alt="a nice image"
  elementtiming="big-image"
  id="myImage" />
js
const observer = new PerformanceObserver((list) => {
  list.getEntries().forEach((entry) => {
    if (entry.identifier === "big-image") {
      console.log(entry.naturalHeight);
    }
  });
});
observer.observe({ type: "element", buffered: true });

Specifications

Specification
Element Timing API
# ref-for-dom-performanceelementtiming-naturalheight

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
naturalHeight
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.