React JS Masterclass - Go From Zero To Job Ready - Dark Mode / 107

React JS Masterclass - Go From Zero To Job Ready - Dark Mode / 107

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

This tutorial covers implementing a dark mode feature in a web application. It begins with setting up the HTML and CSS for dark mode, followed by adding a toggle function using JavaScript. The tutorial then explains how to use local storage to persist the dark mode state across sessions. Finally, it demonstrates applying background colors using Tailwind CSS and concludes with final adjustments.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of adding a class to the HTML root tag in the context of dark mode?

To change the font style

To apply a global dark mode theme

To increase the page load speed

To enhance the security of the page

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which event is used to trigger the dark mode toggle?

onchange

onclick

onload

onhover

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of the useEffect hook in managing dark mode?

To handle form submissions

To update the HTML class based on state changes

To fetch data from an API

To manage user authentication

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the default state value for dark mode when the page first loads?

Null

Undefined

False

True

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is local storage used in the dark mode implementation?

To store user passwords

To save the dark mode state across sessions

To store user preferences for font size

To cache images for faster loading

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the application determine the initial dark mode state on subsequent visits?

By asking the user

By reading from local storage

By querying a database

By checking a cookie

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the dark mode state when the page is refreshed without local storage?

It throws an error

It prompts the user to choose

It resets to the default state

It remains unchanged

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