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

Answer & Solution

Answer: Option B
Solution:
The preventDefault() method in JavaScript event handling prevents the default behavior associated with an event, such as submitting a form, following a link, or executing a browser's default action. It allows developers to control how events are handled and customize the behavior based on specific requirements.
Related Questions on Average

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.

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

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

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'); });

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

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 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

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

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

A). A. appendEvent()

B). B. addEventListener()

C). C. attachEvent()

D). D. bindEvent()