Custom textbox validating user input
This allows user agents to support at least the base role, and user agents that support the custom role can provide enhanced access.
Note that much of this could be formalized in [) to interact with content.
Accessibility of web content requires semantic information about widgets, structures, and behaviors, in order to allow assistive technologies to convey appropriate information to persons with disabilities.
This specification provides an ontology of roles, states, and properties that define accessible user interface elements and can be used to improve the accessibility and interoperability of web content and applications.
a tree widget) are more complex examples, in which various parts of the widget have semantics that need to be properly identified for assistive technologies to support effective interaction.
The incorporation of is a way for an author to provide proper semantics for custom widgets to make these widgets accessible, usable, and interoperable with assistive technologies.States and properties are used to declare important attributes of an element that affect and describe interaction.They enable the user agent and operating system to properly handle the element even when the attributes are dynamically changed by client-side scripts.Elements that have one defined meaning in the language are used with a different meaning intended to be understood by the user.
For example, web application developers create collapsible tree widgets in element.
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