JavaScript Event Handling Quiz

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Question 1/15

Which method is used to detect if an element has lost focus?

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Question 2/15

Which event handler is triggered when a form input field is selected?

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Question 3/15

What happens if you attach multiple event listeners to the same event?
let button = document.getElementById('myButton');

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Question 4/15

Which event is fired when an input field gains focus?

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Question 5/15

Which JavaScript method simulates an event occurring on an element?
let button = document.getElementById('myButton');

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Question 6/15

What is the correct method to stop event propagation?
let button = document.getElementById('myButton');

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Question 7/15

What is the method to remove an event listener in JavaScript?
let button = document.getElementById('myButton');

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Question 8/15

Which method allows you to trigger a focus event on an element?
let input = document.getElementById('myInput');

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Question 9/15

How can you trigger a click event manually in JavaScript?
let button = document.getElementById('myButton');

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Question 10/15

How can you detect if a user has changed the value of an input field?

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Question 11/15

How can you capture the 'Escape' key press in a keydown event?

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Question 12/15

Which event is fired when the DOM has been completely loaded?

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Question 13/15

What does the 'this' keyword refer to in an event handler?
<button id="myButton">Click me</button>

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Question 14/15

Which event is fired when the browser window is resized?

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Question 15/15

What is the correct way to add an event listener for a button click event?
let button = document.getElementById('myButton');

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Your Results

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Your Answers

Question 1/15
😊 Your answer was correct 🙁 Your answer was incorrect
Which method is used to detect if an element has lost focus?

Available answers

The
blur
event is fired when an element loses focus.
Question 2/15
😊 Your answer was correct 🙁 Your answer was incorrect
Which event handler is triggered when a form input field is selected?

Available answers

The
select
event is fired when some text in an input field is selected.
Question 3/15
😊 Your answer was correct 🙁 Your answer was incorrect
What happens if you attach multiple event listeners to the same event?
let button = document.getElementById('myButton');

Available answers

All event listeners for a given event are triggered in the order they were added, unless propagation is otherwise interfered with.
Question 4/15
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Which event is fired when an input field gains focus?

Available answers

The
focus
event is fired when an element becomes focused.
Question 5/15
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Which JavaScript method simulates an event occurring on an element?
let button = document.getElementById('myButton');

Available answers

The
dispatchEvent
method is used to trigger an event for the specified event type.
Question 6/15
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What is the correct method to stop event propagation?
let button = document.getElementById('myButton');

Available answers

stopPropagation()
stops the event from bubbling up the DOM tree.
Question 7/15
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What is the method to remove an event listener in JavaScript?
let button = document.getElementById('myButton');

Available answers

removeEventListener
is used to remove a previously attached event listener.
Question 8/15
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Which method allows you to trigger a focus event on an element?
let input = document.getElementById('myInput');

Available answers

The
focus()
method is used to trigger a focus event on an element.
Question 9/15
😊 Your answer was correct 🙁 Your answer was incorrect
How can you trigger a click event manually in JavaScript?
let button = document.getElementById('myButton');

Available answers

You can programmatically trigger a click event using
button.click();
.
Question 10/15
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How can you detect if a user has changed the value of an input field?

Available answers

The
change
event is used to detect when the value of an input has changed.
Question 11/15
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How can you capture the 'Escape' key press in a keydown event?

Available answers

The 'Escape' key has a keyCode of 27, so you use
event.keyCode === 27
to check for it.
Question 12/15
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Which event is fired when the DOM has been completely loaded?

Available answers

The
DOMContentLoaded
event occurs when the HTML document has been fully loaded and parsed.
Question 13/15
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What does the 'this' keyword refer to in an event handler?
<button id="myButton">Click me</button>

Available answers

In an event handler,
this
refers to the element that received the event.
Question 14/15
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Which event is fired when the browser window is resized?

Available answers

The
resize
event is triggered when the browser window changes size.
Question 15/15
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What is the correct way to add an event listener for a button click event?
let button = document.getElementById('myButton');

Available answers

The correct method is
addEventListener
. It attaches an event handler to the specified event.