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

Answer & Solution

Answer: Option A
Solution:
To prevent the default behavior of an event in JavaScript, you can use the event.preventDefault() method inside the event handler function. This method stops the browser from executing the default action associated with the event, such as submitting a form or following a link.
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

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()

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

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

A). A. To create inline event handlers

B). B. To attach event listeners to HTML elements

C). C. To remove event listeners from HTML elements

D). D. To bind event handlers to parent elements

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

A). A. onhover

B). B. onsubmit

C). C. onload

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 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

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'); });

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