JavaScript Questions

It displays a dialog box with the message 'Enter your name:' and a default input value 'John Doe', returning the user's input as a string.

It prints 'Enter your name: John Doe' to the console.

It sets the user's name to 'John Doe' in the browser's local storage.

It creates an alert box with the message 'Enter your name: John Doe'.

document.querySelector('#profilePic').setAttribute('src', '/new-image.jpg');

document.getElementById('profilePic').src = 'new-image.jpg';

document.getElementById('profilePic').setAttribute('src', 'new-image.jpg');

document.querySelector('#profilePic').src = 'new-image.jpg';

To re-throw the caught error

To execute code only if an error doesn't occur

To handle the error thrown in the 'try' block

To specify the type of error to catch

unshift()

shift()

pop()

slice()

Fetching data from a server

Defining the structure of a web page

Styling web page elements

Interpreting and executing JavaScript code

You cannot set a property to undefined in JavaScript.

They are functionally the same.

delete sets the property to null, while setting it to undefined removes it entirely.

delete completely removes the property, while setting it to undefined keeps the property but with no value.

document.querySelector('#myButton').addEventListener('click', () => console.log('Button Clicked!'));

document.getElementById('myButton').addEventListener('click', console.log('Button Clicked!'));

document.getElementById('myButton').addEventListener('click', function() { console.log('Button Clicked!'); });

document.querySelector('#myButton').onclick = console.log('Button Clicked!');

5

0

10

undefined

undefined

true

"object"

false

for...in

for

while

do-while