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Q
Consider the following HTML code: Which JavaScript code adds a click event listener to the button?

Answer & Solution

Answer: Option B
Solution:
The correct way to add a click event listener to the button with the ID myButton is by using the addEventListener() method as shown in Option B. This method ensures proper event handling and allows for attaching multiple event listeners to the same element without overwriting existing ones.
Related Questions on Average

Which event is triggered when a web page finishes loading?

A). A. onload

B). B. onsubmit

C). C. onmouseover

D). D. onclick

What does the preventDefault() method do in JavaScript event handling?

A). A. Stops event propagation to parent elements

B). B. Prevents the default behavior associated with an event

C). C. Detaches event listeners from elements

D). D. Clears the event queue

How can you attach multiple event listeners to the same HTML element in JavaScript without overwriting existing ones?

A). A. By using the attachEvent() method

B). B. By using the addEventListener() method with the replace parameter

C). C. By assigning multiple functions directly to the element's event attributes (e.g., onclick, onmouseover)

D). D. By using the addEventListener() method multiple times for the same event

Which of the following correctly defines a JavaScript function?

A). A. function addNumbers(num1, num2) { return num1 + num2; }

B). B. function = addNumbers(num1, num2) { return num1 + num2; }

C). C. function addNumbers(num1 + num2) { return num1 + num2; }

D). D. function addNumbers(num1, num2) => { return num1 + num2; }

Which type of JavaScript function is defined without a name?

A). A. Named function

B). B. Anonymous function

C). C. Arrow function

D). D. Generator function

What is the primary purpose of JavaScript functions?

A). A. To style web pages

B). B. To provide structure to HTML elements

C). C. To create reusable code blocks

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Which statement accurately describes JavaScript event bubbling?

A). A. It refers to the downward propagation of events from parent elements to child elements.

B). B. It refers to the upward propagation of events from child elements to parent elements.

C). C. It refers to the simultaneous firing of multiple events on the same element.

D). D. It refers to the automatic removal of event listeners after an event is triggered.

Which event is triggered when a user clicks on an HTML element?

A). A. onhover

B). B. onsubmit

C). C. onload

D). D. onclick

Which method is used to remove an event listener from an HTML element in JavaScript?

A). A. removeEventListener()

B). B. detachEvent()

C). C. removeEvent()

D). D. clearEventListener()

What is the purpose of the oninput event in HTML?

A). A. To track changes in form inputs

B). B. To detect mouse movements

C). C. To determine when an element is loaded

D). D. To handle form submissions