SeoImage class

A widget that displays an image and injects a corresponding HTML <img> element into the DOM for SEO purposes when running on the web.

This is useful because Flutter's default rendering on web uses a canvas, which is not SEO-friendly for search engines. By implementing SeoInjectable, this widget ensures that search engine crawlers can read and index the image's HTML representation.

Example usage:

SeoImage(
  src: 'https://example.com/image.jpg',
  alt: 'Example image',
  width: 200,
  height: 150,
)

When running on the web, this will also create an HTML <img> element with the specified attributes and inject it into the DOM.

Inheritance
Implemented types

Constructors

SeoImage({required String src, String? alt, double? width, double? height, BoxFit? fit, AlignmentGeometry alignment = Alignment.center, ImageRepeat repeat = ImageRepeat.noRepeat, String? semanticLabel, bool excludeFromSemantics = false, String? id, void onTap()?, Key? key})
Creates a SeoImage widget.
const

Properties

alignment → AlignmentGeometry
How to align the image within its bounds.
final
alt → String?
The alternative text for the image, used by screen readers and SEO. If not provided, semanticLabel is used instead.
final
excludeFromSemantics → bool
Whether to exclude the image from semantics.
final
fit → BoxFit?
How to inscribe the image into the space allocated during layout.
final
hashCode → int
The hash code for this object.
no setterinherited
height → double?
The height of the image (both in Flutter and in the HTML element).
final
id → String?
The id attribute of the HTML <img> element. If not provided, a random ID will be generated.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onTap → void Function()?
Optional callback triggered when the link is tapped in Flutter.
final
repeat → ImageRepeat
How to paint any portions of the image that do not fit inside the box.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticLabel → String?
A label for the image used by screen readers.
final
src → String
The URL of the image to display.
final
width → double?
The width of the image (both in Flutter and in the HTML element).
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
createHtmlElement() → WebHTMLElement?
Creates and returns a WebHTMLElement to represent this object in the DOM.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited