Which of the following is a common JavaScript event handler?

The correct answer is D. All of the above. All three options - onclick, onmouseover, and onchange - are genuine, commonly used JavaScript event handlers, which makes D (All of the above) correct. onclick fires when a user clicks an element, onmouseover fires when the mouse cursor enters an element's area, and onchange…

Client-Side Scripting and Media Queries

Question

Options

Aonclick
Bonmouseover
Conchange
DAll of the above

How the community answered

(62 responses)

A
2% (1)
B
2% (1)
C
3% (2)
D
94% (58)

Explanation

All three options - onclick, onmouseover, and onchange - are genuine, commonly used JavaScript event handlers, which makes D (All of the above) correct. onclick fires when a user clicks an element, onmouseover fires when the mouse cursor enters an element's area, and onchange fires when the value of a form element (like an input or select) changes. Since A, B, and C are each valid on their own, none of them can be a "distractor" - they're all correct, which is exactly why D is the answer.

Memory tip: Think of event handlers as "on + action" pairs - on + click, on + mouseover, on + change. If you see on followed by a user action, it's almost certainly a real event handler. When an exam lists multiple things that are all true, "All of the above" is usually the trap hiding in plain sight.

Topics

#JavaScript events#event handlers#DOM interaction#client-side scripting

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