Modern Web Design with HTML5, CSS3, and JavaScript - Selecting the Elements of JavaScript Document Object Model (DOM)

The video tutorial explains how to navigate the console and DOM tree, focusing on accessing and updating elements within the document object. It covers the structure of the DOM, including parent and child nodes, and demonstrates methods for selecting and updating elements using JavaScript. The tutorial also highlights the use of variables for efficient DOM manipulation, emphasizing the importance of selection methods like getElementById and updating style attributes.

What is the purpose of using the console to navigate the DOM tree?

• To create new HTML elements

• To modify the HTML structure directly

• To view and interact with the DOM elements

• To delete unwanted elements from the DOM

In the HTML document structure, what is the relationship between parent and child nodes?

• Parent nodes are always at the top level

• Child nodes can have their own children

• Parent nodes cannot have more than one child

• Child nodes are always leaf nodes

Why is selection important when working with the document object?

• It automatically updates all elements in the document

• It ensures that only one element is selected at a time

• It prevents the document from being modified

• It allows for efficient updates and manipulation of specific elements

Which method is used to select an element by its ID?

• querySelector

• getElementById

• getElementsByTagName

• getElementByClass

How can you update the style of a selected element in the DOM?

• By changing the HTML directly

• By using the setStyle method

• By modifying the style property of the element

• By using the updateStyle function

What is the benefit of using JavaScript variables for DOM elements?

• It allows for easier and more organized manipulation of elements

• It prevents the elements from being modified

• It automatically updates the elements

• It makes the elements read-only

What happens when you refresh the page after making changes to the DOM with JavaScript?

• The changes are permanently saved

• The changes are lost unless saved to a file

• The changes are automatically reverted

• The changes are applied to all open tabs