Enum Decoding 

pub enum Decoding {
    Sync,
    Async,
    Auto,
}

The decoding attribute values for image decoding.

Purpose

Provides a hint to the browser about how to decode the image, allowing optimization of the decoding strategy for better user experience.

Usage Context

• Used with: <img> elements
• Performance: Affects when/how images are decoded relative to page rendering
• Default: Browser-dependent

Valid Values

• Sync: Decode the image synchronously for atomic presentation with other content
• Async: Decode the image asynchronously to avoid delaying other content
• Auto: Let the browser decide the optimal decoding mode

Example

use ironhtml_attributes::{AttributeValue, Decoding};
let decoding = Decoding::Async;
assert_eq!(decoding.to_attr_value(), "async");

<img src="hero.jpg" decoding="sync" alt="Decode with page content">
<img src="gallery.jpg" decoding="async" alt="Decode asynchronously">
<img src="photo.jpg" decoding="auto" alt="Browser decides">

WHATWG Specification

• The decoding attribute

Variants

Sync

Decode the image synchronously along with other page content for atomic presentation. May delay rendering.

Async

Decode the image asynchronously to reduce delay in presenting other content. Image may render after initial page load.

Auto

Allow the browser to choose the decoding strategy. This is the recommended default.

Trait Implementations

impl AttributeValue for Decoding

fn to_attr_value(&self) -> Cow<'static, str>

Convert to the attribute value string.

impl Clone for Decoding

fn clone(&self) -> Decoding

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Decoding

impl Debug for Decoding

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Decoding

impl PartialEq for Decoding

fn eq(&self, other: &Decoding) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Decoding