[Introduction to React] A complete guide to creating a quiz app | Easily implement score display and question management!

programming

I want to learn React, but I don't know what to make.
A quiz app is recommended for such beginners.
It contains all the basics of React, such as screen display, state management, and event handling.
In addition, adding a scoring function will expand the scope of what you can learn.
In this article,Building a quiz app with scores from scratch using ReactThe steps to
Words and structures that even elementary school students can understandWe will explain it in an easy-to-understand manner.

What is a quiz app? Explaining the basics

What is the structure of a quiz app?

First, let's explain the basic structure of a quiz app.

  • Question setting
  • Select your answer
  • Correct or incorrect?
  • Next question
  • Score calculation and display

Through this mechanism,useStateorEvent HandlingThis will deepen your understanding.

Why use React?

React is a library that excels at switching screens and managing states.

  • Create the look with less code
  • Changes are reflected immediately on the screen
  • Easy data management

By utilizing these features,Ability to create apps efficientlyYou will acquire the skills.

Considering the screen layout of a React quiz app

Breaking down the actual UI structure

Create a screen like the one below.

  • "Start button"
  • "Quiz text and options"
  • "Score display"
  • "Again button"

In React, the basic principle is to think about components in smaller parts.

Roles of each component

For example, divide it as follows:

  • App.js: Putting the whole together
  • Question.js: Show problem
  • Score.js: Score display

By doing this,Better code visibility and easier modificationIt will be.

Create quiz data

First, prepare the quiz data

Prepare the questions as an array like this:

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, , , , , , } ];

Data points

  • Objects in an arrayPut
  • It consists of three elements: question, choice, and answer.

This structure will be easier to reuse in future apps.

A detailed explanation of how to create a score function

Manage scores with useState

In React,useState HookUse to keep track of your scores.

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Processing when checking answers

Once you click on an option, check to see if it's correct.

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If the answer is correct, add points, you can easily increase your score using this mechanism.

The complete code put together

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summary

  • Quiz App is perfect for React beginners
  • Learn the basics of state management and event handling
  • The addition of a scoring function helps you develop practical skills.

Please actually write the code.The Basics and Fun of ReactPlease experience it.

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