JavaScript for Beginners #2 - Modifying HTML Elements

What is the difference between 'document' and 'console' in JavaScript?

• 'document' refers to the HTML document itself, while 'console' refers to the console window.

• 'document' and 'console' are both methods to display outputs.

• 'document' is used to write logs, while 'console' is used to manipulate HTML elements.

• There is no difference; both are used interchangeably.

What method is used to access an HTML element by its ID?

• getElement()

• getElementById()

• findElementById()

• querySelector()

What property is used to change or get the content of an HTML element?

• textContent

• innerHTML

• value

• innerText

How do you correctly reference an ID in the getElementById() method?

• Using the ID name within quotation marks.

• Preceding the ID name with a hash (#).

• Preceding the ID name with a dot (.)

• Using the ID name without quotation marks.

What is the correct syntax to change the text of an HTML element?

• document.getElementById('id').textContent = 'New Text';

• document.getElement('id').innerHTML = 'New Text';

• document.querySelector('#id').value = 'New Text';

• document.getElementById('id').innerText = 'New Text';

What does 'document.write' do?

• Writes content directly to the console.

• Creates a new HTML document.

• Updates the value of a specified element's ID.

• Writes content directly to the HTML document.

How do you comment out a line of code in JavaScript?

• Using // at the beginning of the line

• Using ** at the beginning of the line

• Using /* and */

• Using

What is the purpose of using comments in code?

• To display messages to the user.

• To make the code execute faster.

• To change the execution flow of the program.

• To leave notes and explanations for developers.

What will happen if you try to use an undefined variable in your code?

• The variable will be automatically defined.

• The variable will be set to null.

• The code will execute without any issues.

• You will receive an error message.

What is the correct way to log the value of an element's property to the console?

• console.write(document.getElementById('id').value);

• document.write(document.getElementById('id').value);

• console.log(document.getElementById('id').value);

• alert(document.getElementById('id').value);