class = "good red hi" has 3 classes good, red and hi
npm - package manager npx - excute only package node - run Javascript outside browser -> on machine and servers
React - Single Page Application
npx create-react-app projectName
Open in VSCode
npm start - start server (opens browser)
Local: http://localhost:3000
On Your Network: http://192.168.56.1:3000 --> On same Wifi
In public folder
- favicon.ico - icon on chrome -index.html - Single page index.html -change title, add bootstrap etc., limited use
src folder - all development done here
- App.js - main file
React - components mein tuti hui
JSX - Javascript Syntax Extension - insert dynamic javascript to react component - mixture of html and javascript
{logo} javascript variable has {} eg. { javascript code} as App.js mein html bhi hai so javascript {} ke andar hi hoga
import './App.css'; - is line se CSS add hoti hai page mein
2 types of component - class and function based
Abhi function based karo
IMP - inside return start and end with empty <> </> to wrap entire code in one thing i.e.
<> .......................Code................. </>
For tabs like hr which have no end / type it as
instead of
REPLACE class with className (as class not in JSX due to conflicts>
Can copy paste from https://react-bootstrap.github.io/ if you want
{ props.searchBar ?
<form className="d-flex" role="search">
<input className="form-control me-2" type="search" placeholder="Search" aria-label="Search"/>
<button className="btn btn-outline-success" type="submit">Search</button>
</form>
: "No search bar"
}
This project was bootstrapped with Create React App.
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in your browser.
The page will reload when you make changes.
You may also see any lint errors in the console.
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.
Your app is ready to be deployed!
See the section about deployment for more information.
Note: this is a one-way operation. Once you eject, you can't go back!
If you aren't satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
You don't have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
You can learn more in the Create React App documentation.
To learn React, check out the React documentation.
This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting
This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size
This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app
This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration
This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify