The loadTime read-only property of the PerformanceElementTiming interface always returns 0 for text. For images it returns the time which is the latest between the time the image resource is loaded and the time it is attached to the element.
PerformanceElementTiming.loadTime
Value
A DOMHighResTimeStamp with the loadTime of the element.
Examples
In this example calling entry.loadTime returns the loadTime of the image element.
<img src="image.jpg" alt="a nice image" elementtiming="big-image" id="myImage">
const observer = new PerformanceObserver((list) => { let entries = list.getEntries().forEach(function (entry) { if (entry.identifier === "big-image") { console.log(entry.loadTime); } }); }); observer.observe({ entryTypes: ["element"] });
Note: This example uses the PerformanceObserver interface to create a list of performance measurement events. In our case we observe the PerformanceEntry.entrytype element in order to use the PerformanceElementTiming interface.
Specifications
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
loadTime |
77
|
79
|
No
|
No
|
64
|
No
|
77
|
77
|
No
|
55
|
No
|
12.0
|
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceElementTiming/loadTime
