Struct Object 

pub struct Object;

The <object> element - embeds external resource as an object.

Purpose

The <object> element represents an external resource, which can be treated as an image, nested browsing context, or resource to be handled by a plugin. It provides fallback content for when the object cannot be displayed. More flexible than <embed> with better fallback support, but modern elements like <video>, <audio>, and <iframe> are often more appropriate.

Content Categories

• Flow Content
• Phrasing Content
• Embedded Content
• If with usemap attribute: Interactive Content
• Palpable Content

Permitted Content Model

• Zero or more <param> elements
• Followed by transparent content (fallback)

Common Use Cases

• Embedding PDF documents with fallback
• Displaying SVG images with fallback content
• Plugin-based content with degradation path
• Embedding Flash content with alternatives (legacy)
• Nested browsing contexts with fallback options

Key Attributes

• data: URL of the resource
• type: MIME type of the resource
• name: Name for form submission or scripting
• width: Width in CSS pixels
• height: Height in CSS pixels
• usemap: Associates with an image map
• form: Associates with a form element
• typemustmatch: Type attribute must match resource’s type

Example

<!-- PDF with fallback link -->
<object data="/documents/report.pdf"
        type="application/pdf"
        width="800"
        height="600">
  <p>Your browser doesn't support PDF viewing.
     <a href="/documents/report.pdf">Download the PDF</a></p>
</object>

<!-- SVG with fallback image -->
<object data="/images/diagram.svg"
        type="image/svg+xml"
        width="400"
        height="300">
  <img src="/images/diagram.png" alt="Diagram">
</object>

<!-- Object with parameters -->
<object data="/media/animation.swf"
        type="application/x-shockwave-flash"
        width="640"
        height="480">
  <param name="quality" value="high">
  <param name="autoplay" value="false">
  <p>Flash content requires the Adobe Flash Player.</p>
</object>

<!-- Nested fallbacks -->
<object data="/video/movie.mp4" type="video/mp4">
  <object data="/video/movie.ogv" type="video/ogg">
    <p>Your browser doesn't support the video. <a href="/video/movie.mp4">Download</a></p>
  </object>
</object>

Accessibility

• Provide meaningful fallback content
• Ensure embedded content is accessible
• Use aria-label or descriptive fallback text
• Test with assistive technologies
• Consider using semantic alternatives when available

WHATWG Specification

• 4.8.7 The object element

Trait Implementations

impl HtmlElement for Object

const TAG: &'static str = "object"

The HTML tag name (e.g., “div”, “span”, “img”).

const VOID: bool = false

Whether this is a void element (self-closing, no children allowed).

impl CanContain<Param> for Object

impl<T: FlowContent> CanContain<T> for Object

impl EmbeddedContent for Object

impl FlowContent for Object

impl PalpableContent for Object

impl PhrasingContent for Object