HTMLImageElement: decoding property

The decoding property of the HTMLImageElement interface represents a hint given to the browser on how it should decode the image.

Value

A string representing the decoding hint. Possible values are:

sync

Decode the image synchronously for atomic presentation with other content.

async

Decode the image asynchronously to reduce delay in presenting other content.

auto

Default mode, which indicates no preference for the decoding mode. The browser decides what is best for the user.

Usage notes

The decoding property allows you to control whether or not the browser is allowed to try to parallelize loading your image. If doing so would cause problems, you can specify sync to disable asynchronous loading. This can be useful when applied to <img> elements, but may be even more so when used for offscreen image objects.

Examples

js

const img = new Image();
img.decoding = "sync";
img.src = "img/logo.png";

Specifications

Specification
HTML Standard
# dom-img-decoding

Browser compatibility

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