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Javascript Library Articles
Page 18 of 18
Handling events in React.js
There are some syntactical differences in writing events but it is handled similar to DOM elements event handling.The name of event handlers are written in camel case notations.ExampleEvent in simple html − Add User Event in React with jsx: Add User One of the difference is we do not write return false to prevent default behavior in React. Instead of that we specifically write event.preventDefault()ExampleIn simple Html − Add User In React it will be written as −function addUser(event){ event.preventDefault(); console.log(‘Add user event clicked’); } Add User Here event passed in ...
Read MoreRendering elements in React.js
The smallest building blocks of React applications are the elements. Example of an element is −const message = Welcome, Steve;React DOM updates the actual DOM with the converted react elements. React components are made up of elements.Rendering element on DOMWe will have a parent div element in the main html file . This div can be called as root. ReactDOM manages everything which is inside the app div. We can add multiple such an isolated div in applications if required.To render the element it will be passed to the ReactDOM render method −const message = Welcome, Steve; ReactDOM.render(message, document.getElementById('app'));This will ...
Read MoreDisplay hello world using React.js
create-react-app is a command to create a React.js project with default configuration. Create-react-app will help in running react applications. Command will be executed on npm or yarnIf npm and node.js is installed on computer, install create-react-app globally with command −npm install –g create-react-appCreation of project − to create a project once above commands are executed, run below command −npx create-react-app hello-world-examplenpx comes with npm version 5.2+ , npm version can be checked on terminal using npm –versionIf npm version is 5.2+, then react.js project can be directly created with command −npx create-react-app hello-world-exampleIf npm version is 6+, npm init react-app ...
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