HTML CSS and JavaScript for Beginners - A Web Design Course - Change Classes DOM

This video tutorial provides an overview of how to update styles using JavaScript. It covers setting up simple styles, applying class names, and managing class lists by adding, removing, and toggling classes. The tutorial includes practical examples to demonstrate these concepts, helping viewers understand how to manipulate styles dynamically using JavaScript.

What is the initial step in updating styles using JavaScript?

• Directly modifying the HTML file

• Using a query selector to select elements

• Changing the CSS file

• Using a database to store styles

Which JavaScript method is used to apply a class to an element?

• applyClass()

• className

• addClass()

• setClass()

What is the purpose of the class list in JavaScript?

• To store all HTML elements

• To delete HTML elements

• To manage multiple classes for an element

• To create new CSS styles

How can you remove a class from an element using JavaScript?

• element.removeClass('className')

• element.className = ''

• element.classList.remove('className')

• element.deleteClass('className')

What happens when you toggle a class using JavaScript?

• The class is renamed

• The class is duplicated

• The class is added if absent and removed if present

• The class is permanently removed

What is the effect of setting a class name directly on an element?

• It appends the class to existing classes

• It replaces any existing classes

• It creates a new HTML element

• It changes the element's ID

Which of the following is a benefit of using JavaScript for class manipulation?

• It allows for dynamic style changes

• It makes the website slower

• It requires less code than CSS

• It is easier to debug than CSS