Event Listeners & the Event Object

The video tutorial introduces DOM events, explaining how to add event listeners to elements and handle default behaviors. It covers the use of both named and unnamed functions for event handling and explores the event object in detail, including its properties like target, clientX, clientY, and coordinates. The tutorial emphasizes the importance of understanding event object properties for effective DOM manipulation.

What is the primary purpose of adding an event listener to a DOM element?

• To listen for and respond to user interactions

• To change the style of the element

• To remove the element from the DOM

• To create a new element in the DOM

Which method is used to prevent the default behavior of an element?

• cancelEvent

• stopImmediatePropagation

• preventDefault

• stopPropagation

What is an advantage of using named functions for event handling?

• They can only be used with click events

• They execute faster than anonymous functions

• They are easier to debug and maintain

• They automatically prevent default behaviors

Which property of the event object gives the element that triggered the event?

• event.type

• event.target

• event.element

• event.currentTarget

How can you change the text of a button when an event is triggered?

• Using event.target.innerHTML

• Using event.target.textContent

• Using event.target.innerText

• Using event.target.value

How can you get a list of all classes associated with an event target?

• Using event.target.classes

• Using event.target.getClasses

• Using event.target.classList

• Using event.target.className

What does the clientX property of the event object represent?

• The X coordinate of the event relative to the screen

• The X coordinate of the event relative to the document

• The X coordinate of the event relative to the viewport

• The X coordinate of the event relative to the element

Which event type is triggered when a user moves the mouse over an element?

• click

• mouseover

• mouseenter

• mousemove

What information can be obtained from the event's timestamp property?

• The time the event was canceled

• The time the event was created

• The time the event was last modified

• The time the event was triggered

Which method is used to get the coordinates of an event relative to the element itself?

• clientX and clientY

• pageX and pageY

• screenX and screenY

• offsetX and offsetY