04.- Reactjs⚛️ trabajar con clases [class y render en reactjs]


En este tutorial vamos a aprender a crear clases en reactjs, si hemos visto las funciones que hemos trabajado no hemos manejado clases. Lo mas apropiado o mas recomendado es trabar con clases.

public/index.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta name="theme-color" content="#000000" />
    <!--
      manifest.json provides metadata used when your web app is installed on a
      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
    -->
    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
    <!--
      Notice the use of %PUBLIC_URL% in the tags above.
      It will be replaced with the URL of the `public` folder during the build.
      Only files inside the `public` folder can be referenced from the HTML.

      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
      work correctly both with client-side routing and a non-root public URL.
      Learn how to configure a non-root public URL by running `npm run build`.
    -->
    <title>React App</title>
  </head>
  <body>
    <noscript>You need to enable JavaScript to run this app.</noscript>
    <div id="root"></div>
    <!-- <div id="MiElemento"></div>-->
    <div id="MiClase"></div>
    
    <!--
      This HTML file is a template.
      If you open it directly in the browser, you will see an empty page.

      You can add webfonts, meta tags, or analytics to this file.
      The build step will place the bundled scripts into the <body> tag.

      To begin the development, run `npm start` or `yarn start`.
      To create a production bundle, use `npm run build` or `yarn build`.
    -->
  </body>
</html>

src/MiClase/MiClase.js


import React, { Component } from 'react';

class Miclase extends Component {
    render (){
        return (
            <div className="contenido">
                <h2>Titulo</h2>
                <p>
                    Contenido
                </p>
            </div>
        );
    }
}

export default Miclase;

src/index.js


import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import MiApp from './MiApp/MiApp';
import MiClase from './MiClase/MiClase';
import * as serviceWorker from './serviceWorker';
import array from './modelo/datos'
ReactDOM.render(<App />, document.getElementById('root'));
// ReactDOM.render(<MiApp variable="texto" array={array} />, document.getElementById('MiElemento'));
ReactDOM.render(<MiClase />, document.getElementById('MiClase'));
// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: https://bit.ly/CRA-PWA
serviceWorker.unregister();


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