Modern JavaScript from the Beginning - Second Edition - Manipulating Styles and Classes
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary reason for using JavaScript to manipulate CSS classes?
To simplify the HTML structure
To enable dynamic functionality based on user interactions
To add static styles to elements
To change styles when the page loads
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is used to select a single element by its class in JavaScript?
querySelectorAll
getElementsByClassName
querySelector
getElementById
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you set a new class name using the className property?
It toggles the new class on and off
It removes all existing classes and sets the new class
It only affects inline styles
It appends the new class to existing classes
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method allows you to add a class without removing existing classes?
className
addClass
setClass
classList.add
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you toggle a class on and off using JavaScript?
Using classList.remove
Using classList.add
Using classList.toggle
Using className
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the replace method in classList?
To toggle a class
To replace one class with another
To remove a class
To add a new class
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you change the style of an element directly using JavaScript?
Using setAttribute
Using the style property
Using classList
Using className
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