HTMLImageElement: fetchPriority property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The fetchPriority property of the
HTMLImageElement interface represents a hint given to the browser on how
it should prioritize the fetch of the image relative to other images.
Value
A string representing the priority hint. Possible values are:
high-
Fetch the image at a high priority relative to other images.
low-
Fetch the image at a low priority relative to other images.
auto-
Default mode, which indicates no preference for the fetch priority. The browser decides what is best for the user.
The fetchPriority property allows you to signal high or low priority image
fetches. This can be useful when applied to <img> elements
to signal images that are "important" to the user experience early in the
loading process.
The effects of the hint on resource loading is browser-specific so make sure to test on multiple browser engines.
Use it sparingly for exceptional cases where the browser may not be able to infer the best way to load the image automatically. Over use can result in degrading performance.
Examples
const img = new Image();
img.fetchPriority = "high";
img.src = "img/logo.png";
Specifications
| Specification |
|---|
| HTML Standard # dom-img-fetchpriority |
Browser compatibility
BCD tables only load in the browser