React Developer concepts

React Developer concepts you must know as a React Developer in 2023

Introduction to the React Developer concepts

So we have some React developer concepts you, as a React developer would be interested in.

We have created a list of pitfalls and ideas related to how state and effects operate in React. I am confident that you will learn something new today!

Is React easy?

React is an easy-to-use and learn front-end library. But there are some concepts that a developer should know to write performant and efficient code.

Deriving the State

Let us illustrate with an example. Assume you have a select element that contains the user ids of several users. A userId state variable is being used to monitor the specified user id.

import { useState } from "react"const users = [  { id: "1", name: "User One" },  { id: "2", name: "User Two" },  { id: "3", name: "User Three" },]function Users () {  const [userId, setUserId] = useState("1")    return(    <select value={userId} onChange={e => setUserId(e.target.value)}>      <option value="1">User One</option>      <option value="2">User Two</option>      <option value="3">User Three</option>    </select>  );}

You should additionally display the selected user on the screen. So, using the useEffect hook, you create another state variable named selectedUser and set it whenever the userId changes.

Are you a Nigerian in the UK trying to get your NIN capture done? Click here.

Photo by Lautaro Andreani on Unsplash

Let us talk about another React Developer concept

Functions for cleaning up

The useEffect hook lets you to return a function that executes before the following render’s useEffect and also before unmounting the component. This method can be used to unsubscribe from events that the component no longer requires.

useEffect(() => {  button.addEventListener("click", listener)  return () => {    button.removeEventListener("click", listener)  }}, [])

Leave a Comment

Your email address will not be published. Required fields are marked *

three − one =