Welcome to the world of React! In this blog post, we’ll be diving into the building blocks of a React app: components. By the end of this post, you should have a strong understanding of what components are, how they work, and how to use them to create a simple React app.
What are React Components?
At the core of every React app are components. Components are the building blocks of a React app – they are small, reusable pieces of code that represent a piece of your UI.
Components can be either functional or class-based. Functional components are just functions that return a React element, while class-based components are classes that extend the base
Functional components are the simplest form of a React component. They are just functions that return a React element. Here’s an example of a functional component:
This component simply returns an
h1 element with the text “Hello, World!”.
Functional components are great for simple, presentational components that don’t have any state or lifecycle methods.
Class-based components are a bit more powerful than functional components. They allow you to define state, lifecycle methods, and more. Here’s an example of a class-based component:
This component is very similar to the functional component above, but it has the added benefit of being able to use state and lifecycle methods.
Creating a Simple React App with Components
Now that we have a basic understanding of what components are, let’s create a simple React app using them.
First, let’s create a new React app using the
create-react-app command-line tool:
This will create a new directory called
my-app with a basic React app setup.
Next, let’s create a new component for our app. In the
src directory, create a new file called
In this file, let’s create a simple functional component that displays a message:
Now, let’s use this component in our app. Open the
App.js file and import our new component:
Finally, let’s start the app to see our component in action:
You should now see a page that displays the message “This is my component”.
Congratulations, you’ve successfully created a simple React app using components!
Components are the building blocks of a React app. They are small, reusable pieces of code that represent a piece of your UI. They can be either functional or class-based, and they allow you to split your UI into smaller, more manageable pieces.
In this blog post, we’ve learned what components are and how to create a simple React app using them. I hope you now have a strong understanding of how to use components in your own React projects.
If you want to learn more about React, I recommend checking out the official documentation or taking an online course to dive deeper into the framework. Happy coding!