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Reactjs is a JavaScript library which is maintained by Facebook and Instagram. It was mainly developed for UI. React.Js is component based so that it provides readability of DOM components.
Features of ReactJS.
Points which we will cover in this article
Environment Setup
Tools required for ReactJS environment
Steps to Setup ReactJS Environment
Go to Reactjs directory location - see screenshot.
Type command for React environment.
Npm install Create-react-app -g
-g is representing that the installation type is global.
Second command - Create-react-app ApplicationName
Go to AppliactionName directory and type npm start.
After starting your first React application, you will get the default screen on the browser.
React component is a reusable independent piece of code.
You can see the default structure of ReactJS application in the below screenshot.
I will keep the only required file for basic component practice so that I delete an extra file from this structure which is highlighted by red rectangular box 2.
Now. the application folder structure should look like this.
In there, component render() method is the most important one. In render method, we will return what we want to show on the page.
ReactDom.Reander() is specifying where on the page we want the app component to be rendered. In the ReactDom.Reander method we pass, the first argument passes as component name like <Hello/>and second is Id of the HTML tag.
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