React Projects and State management

The core functionality of any application is to manage, store and manipulate data created within it or received from external sources.

These data can be in the form of variables, objects, Boolean values, etc. It can be any data type supported by the language used. Applications must store, modify, and use this data in any desired way.

React is a JavaScript framework known for its componentized structure, which uses all data types supported by JavaScript.

One of React’s powerful and flexible core features is its ability to manage state within components.

Introduced in React 16.8, useState hooks are an essential tool for managing state in functional components.

This article will discuss:

1. useState What is a hook?
2. How is it used in the app?
3. Best practices for using it
4. Benefits of using useState hooks in your application

What is a useState hook?

State in React is an object that contains real-time data used by the application.

It is a built-in React object used to contain data or information for a component. A component's state changes over time; every time it changes, the component is re-rendered.

useState Hooks are a powerful addition to React, introduced in version 16.8. It allows managing state in functional components without using class-based components.

It should be noted that only one useState() can be used to declare a state variable at a time.

How to use useState hook in React syntax?

To use the useState hook, it must be imported at the top level of your application.

<code class="language-javascript">import { useState } from "react";</code>

useState The hook receives an initial state and returns two values.

The first value contains the state, the second value is a function that updates the state, and the value set to the state will be its initial value.

This is done by calling the useState hook and passing the initial value to be assigned to the variable.

<code class="language-javascript">const [apple, setApple] = useState(0);</code>

In this example, apple is the state, setApple is the function that updates apple, and 0 is the initial value of apple.

How to update status using React useState?

To update the value set by the state, you will call useState with the second value in the array and pass the updated value in, it will look like this:

<code class="language-javascript">setApple(1);</code>

Now the value of apple will be equal to the value of any value within the brackets, in this case, apple is set to 1.

Best Practices for useState in React

While there are various tips on how to best use useState hooks, adhering to the following tips will help you have clean, reusable code.

• Use "const" to declare a variable, it cannot be let or var
• Always have a default value when initialized, even if it is zero, this makes it easier to read and avoids runtime issues.
• To avoid unnecessary re-rendering, avoid unnecessary states
• Use multiple state variables for multiple states.

Writing clean and more readable and efficient code is every developer's goal, useState provides a way to process data in the application to update said data.

This powerful hook can be used in a variety of situations, try it on your next project and explore its capabilities.

If you are confused about using a certain concept, please feel free to get in touch or leave a comment below, I look forward to hearing from you.

Happy coding!

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