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

Answer & Solution

Answer: Option B
Solution:
The given JavaScript code adds a keypress event listener to the entire document. When a key is pressed while the document has focus, the specified function logs the pressed key's value to the console, allowing developers to handle keyboard input and perform actions based on the keys pressed.
Related Questions on Average

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 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()

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 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 the onclick attribute in HTML elements?

A). A. To define styles for HTML elements

B). B. To attach event listeners for mouse clicks

C). C. To insert JavaScript code directly into HTML

D). D. To create animations for HTML elements

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 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

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()

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 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