JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Attributes (Get/Set) / 049

This video tutorial covers the manipulation of HTML attributes using JavaScript. It begins with an introduction to attributes, followed by methods to select elements using querySelector. The tutorial then explains how to get and set attributes using getAttribute and setAttribute methods. It also covers class manipulation and styling elements, highlighting the importance of not overwriting existing styles.

What is the primary focus of this lecture?

• Working with text using innerText

• Understanding and manipulating HTML attributes

• Creating new HTML elements

• Styling web pages with CSS

Which method is used to select an element in JavaScript?

• getElementById

• querySelector

• getElementsByClassName

• getElementsByTagName

What does the getAttribute method do?

• It creates a new HTML element

• It sets a new attribute value

• It removes an attribute from an element

• It retrieves the value of a specified attribute

How can you change the href attribute of a link using JavaScript?

• Using querySelector

• Using getAttribute

• Using setAttribute

• Using innerHTML

What happens if you try to set an attribute that doesn't exist?

• The element is removed

• An error is thrown

• The attribute is created

• The attribute is ignored

Which method is used to iterate over a NodeList in JavaScript?

• forEach

• map

• filter

• reduce

What is the challenge when using setAttribute to modify styles?

• It only works with inline styles

• It doesn't work on all browsers

• It overwrites existing styles

• It requires a specific library

How can you add a new class to an element without overwriting existing classes?

• Using setAttribute

• Using classList.add

• Using innerHTML

• Using querySelector

What is a potential issue when overwriting styles using setAttribute?

• It can remove existing styles

• It may not be supported in all browsers

• It requires additional CSS files

• It can cause JavaScript errors

Why is it important to maintain existing styles when updating them?

• To preserve the website's original design

• To ensure browser compatibility

• To reduce JavaScript code

• To improve loading times