picture

This reference guide describes the picture shortcode arguments.

Arguments

The src argument is required; others are optional.

src

A string containing the path to the image — a page resource, a global resource, or a remote resource.

width

Integer containing the display width of the image in pixels, falling back to 100% of the viewport width — for example 320.

sizes

A string containing a comma-separated list of source size descriptors followed by an optional fallback size — for example 75vw. Recommended resources:

formats

A string slice of image formats, ordered by precedence, used when creating images for the srcset attribute of each source element — for example webp, jpeg.

process

A string containing a Hugo process method — for example fill 1600x900.

lqip

A string containing a Hugo resize method — for example 16x webp q20.

decoding

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 and allow other content to be rendered before this completes.

auto

No preference for the decoding mode; the browser decides what is best for the user. This is the default value, but different browsers have different defaults:

  • Chromium defaults to sync.
  • Firefox defaults to async.
  • Safari defaults to sync except in a small number of circumstances.

fetchpriority

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.

loading

A string providing a hint to the user agent as to how to best schedule the loading of the image to optimize page performance. The possible values are:

eager
The default behavior, eager tells the browser to load the image as soon as the <img> element is processed.
lazy
Tells the user agent to hold off on loading the image until the browser estimates that it will be needed imminently. For instance, if the user is scrolling through the document, a value of lazy will cause the image to only be loaded shortly before it will appear in the window’s visual viewport.

alt

String containing the img element’s alt attribute.

title

String containing the img element’s title attribute.

class

String containing the img element’s class attribute.