Onblur and onfocus relate to which HTML concept?

Onblur and onfocus relate to which HTML concept?

• A. HTML global attributes
• B. Style attributes
• C. Bi-directional override
• D. Event handler attributes

Answer: (D)

Onfocus and onblur are event handler attributes in HTML. They specify JavaScript to run when an element gains focus or loses focus, respectively. This lets you respond to user interactions with form fields, links, buttons, and other focusable elements—for example, running a function when a field is clicked or tabbed into, and another when the user moves away from it. They’re different from style-related attributes (which change appearance) or global attributes like id or class. They’re also distinct from features like bidirectional overrides. In practice you might see something like onfocus="start()" and onblur="stop()" on an input, though modern code often attaches handlers with JavaScript using addEventListener.

Onfocus and onblur are event handler attributes in HTML. They specify JavaScript to run when an element gains focus or loses focus, respectively. This lets you respond to user interactions with form fields, links, buttons, and other focusable elements—for example, running a function when a field is clicked or tabbed into, and another when the user moves away from it. They’re different from style-related attributes (which change appearance) or global attributes like id or class. They’re also distinct from features like bidirectional overrides. In practice you might see something like onfocus="start()" and onblur="stop()" on an input, though modern code often attaches handlers with JavaScript using addEventListener.