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

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()

Consider the following JavaScript code: document.addEventListener('keypress', function(event) { console.log('Key pressed:', event.key); }); What does this code do?

A). A. Adds a click event listener to the document

B). B. Adds a keypress event listener to the document

C). C. Removes a keypress event listener from the document

D). D. Checks if a key is pressed while hovering over an element

Which event occurs when a user submits an HTML form?

A). A. onsubmit

B). B. onmouseover

C). C. onkeydown

D). D. onclick

What is the purpose of parameters in a JavaScript function?

A). A. To return a value from the function

B). B. To define the function's name

C). C. To store variables within the function

D). D. To accept inputs into the function

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 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

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

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 event is triggered when a web page finishes loading?

A). A. onload

B). B. onsubmit

C). C. onmouseover

D). D. onclick

Consider the following JavaScript code: let greet = function(name) { return 'Hello, ' + name + '!'; }; What type of function is greet in this code?

A). A. Named function

B). B. Anonymous function

C). C. Arrow function

D). D. Generator function