Q
In JavaScript, what is the purpose of the addEventListener() method?

Answer & Solution

Answer: Option B
Solution:
The addEventListener() method in JavaScript is used to attach event listeners to HTML elements. It allows developers to define functions (event handlers) that execute in response to specific events on the specified elements, enhancing interactivity and enabling dynamic behavior in web pages.
Related Questions on Average

What is the purpose of the removeEventListener() method in JavaScript?

A). A. To add event listeners to HTML elements

B). B. To detach event listeners from HTML elements

C). C. To prevent event propagation in event handling

D). D. To modify HTML content dynamically

Which event occurs when a user submits an HTML form?

A). A. onsubmit

B). B. onmouseover

C). C. onkeydown

D). D. onclick

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

A). A. document.getElementById('myButton').onclick = function() { alert('Button clicked'); };

B). B. document.getElementById('myButton').addEventListener('click', function() { alert('Button clicked'); });

C). C. document.getElementById('myButton').click(function() { alert('Button clicked'); });

D). D. document.getElementById('myButton').on('click', function() { alert('Button clicked'); });

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 event is triggered when a web page finishes loading?

A). A. onload

B). B. onsubmit

C). C. onmouseover

D). D. onclick

What is the purpose of the onmouseover event in HTML?

A). A. To detect when an element is hovered over

B). B. To track changes in form inputs

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

D). D. To handle form submissions

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.

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

How can you prevent the default behavior of an event in JavaScript?

A). A. By using the event.preventDefault() method inside the event handler function

B). B. By using the event.stopPropogation() method inside the event handler function

C). C. By using the event.stopPropagation() method inside the event handler function

D). D. By using the event.defaultPrevented property inside the event handler 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

D). D. To define CSS styles for HTML