node_modules - contains code for the third-party libraries used by your app.While we’ll be doing most of our work in the src folder, it’s important to understand what everything else does.
Your should see the following folders and files. Make sure you’re in the new todo-list directory. You should see a bunch of downloading happening and finally instructions to cd into your new directory and start coding.
We will discuss more React JS examples in coming articles.Yarn create react-app todo-list -template typescript So here we discussed a simple ToDo application in React JS and also used props to access values and methods from other components and state object to use it to define local values. Call method reference in Todos component using props In file App.js file there is a Class Component with the following code import React, from 'react' ĭocument.getElementById("todoValue").value = "" That means on initialization App component will be loaded in the element having ID root If you look closely at line 6 we have ReactDOM.render(, document.getElementById('root')) If you want your app to work offline and load faster, you can change ReactDOM.render(, document.getElementById('root'))
Import 'bootstrap/dist/css/bootstrap.css' Import * as serviceWorker from './serviceWorker' To include Bootstrap in the application, we need open index.js file then import the bootstrap.css as shown below import React from 'react' In our ToDo application, we will use Bootstrap for a nice user interface. After that, we will install Creat React App toolchain $ npm i -g create-react-appĪfter that run application by running the following command $ npm start
In this post, we will create a very basic but component rich ToDo application using many class components and will also understand some basic concepts used in our app.įirst, make sure you have the latest version of NodeJS installed. React maintains a Virtual DOM which is React Element, converted from JSX and a Real DOM element which is visible to the user on the screen. In class components of ReactJS, we use JSX which is JavaScript with XML. React renders application without using any HTML templates which improves application performance many folds. ReactJS is a powerful library to build robust applications with the help of manageable and reusable components.
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