* chore: rename APIs and Microservices to include "Backend" (#42515) * fix typo * fix typo * undo change * Corrected grammar mistake Corrected a grammar mistake by removing a comma. * change APIs and Microservices cert title * update title * Change APIs and Microservices certi title * Update translations.json * update title * feat(curriculum): rename apis and microservices cert * rename folder structure * rename certificate * rename learn Markdown * apis-and-microservices -> back-end-development-and-apis * update backend meta * update i18n langs and cypress test Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * fix: add development to front-end libraries (#42512) * fix: added-the-word-Development-to-front-end-libraries * fix/added-the-word-Development-to-front-end-libraries * fix/added-word-development-to-front-end-libraries-in-other-related-files * fix/added-the-word-Development-to-front-end-and-all-related-files * fix/removed-typos-from-last-commit-in-index.md * fix/reverted-changes-that-i-made-to-dependecies * fix/removed xvfg * fix/reverted changes that i made to package.json * remove unwanted changes * front-end-development-libraries changes * rename backend certSlug and README * update i18n folder names and keys * test: add legacy path redirect tests This uses serve.json from the client-config repo, since we currently use that in production * fix: create public dir before moving serve.json * fix: add missing script * refactor: collect redirect tests * test: convert to cy.location for stricter tests * rename certificate folder to 00-certificates * change crowdin config to recognise new certificates location * allow translations to be used Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> * add forwards slashes to path redirects * fix cypress path tests again * plese cypress * fix: test different challenge Okay so I literally have no idea why this one particular challenge fails in Cypress Firefox ONLY. Tom and I paired and spun a full build instance and confirmed in Firefox the page loads and redirects as expected. Changing to another bootstrap challenge passes Cypress firefox locally. Absolutely boggled by this. AAAAAAAAAAAAAAA * fix: separate the test Okay apparently the test does not work unless we separate it into a different `it` statement. >:( >:( >:( >:( Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com> Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com> Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
264 lines
6.4 KiB
Markdown
264 lines
6.4 KiB
Markdown
---
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id: 5a24c314108439a4d4036144
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title: Usa "Provider" para conectar Redux a React
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challengeType: 6
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forumTopicId: 301435
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dashedName: use-provider-to-connect-redux-to-react
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---
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# --description--
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En el último desafío, creaste un almacén Redux para manejar el arreglo de mensajes y creaste una acción para añadir nuevos mensajes. El siguiente paso es proporcionar a React acceso al almacén Redux y a las acciones que necesita para enviar las actualizaciones. React Redux proporciona su paquete `react-redux` para ayudar a realizar estas tareas.
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React Redux ofrece si API con dos características clave: `Provider` y `connect`. Otro desafío cubre `connect`. El `Provider` es un componente envolvente de React Redux que envuelve tu aplicación React. Esta envoltura te permite acceder a las funciones Redux `store` y `dispatch` a través de tu árbol de componentes. `Provider` toma dos props, el almacén Redux y los componentes hijos de tu aplicación. La definición del `Provider` para un componente de la App podría ser así:
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```jsx
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<Provider store={store}>
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<App/>
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</Provider>
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```
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# --instructions--
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El editor de código ahora muestra todo tu código Redux y React de los últimos desafíos. Incluye el almacén Redux, las acciones y el componente `DisplayMessages`. La única pieza nueva es el componente `AppWrapper` de la parte inferior. Usa este componente de nivel superior para renderizar el `Provider` de `ReactRedux`, y pasa el almacén Redux como prop. Luego, renderiza el componente `DisplayMessages` como hijo. Una vez que hayas terminado, deberías ver tu componente React renderizado en la página.
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**Nota:** React Redux está disponible como una variable global aquí, por lo que puedes acceder al "Provider" con notación de puntos. El código del editor aprovecha esto y lo establece en una constante `Provider` para que lo uses en el método de renderizado `AppWrapper`.
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# --hints--
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El `AppWrapper` debe renderizarse.
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```js
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assert(
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(function () {
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const mockedComponent = Enzyme.mount(React.createElement(AppWrapper));
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return mockedComponent.find('AppWrapper').length === 1;
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})()
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);
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```
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El componente envolvente `Provider` debe tener una prop de `store` pasada, igual al almacén de Redux.
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```js
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(getUserInput) =>
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assert(
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(function () {
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const mockedComponent = Enzyme.mount(React.createElement(AppWrapper));
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return __helpers
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.removeWhiteSpace(getUserInput('index'))
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.includes('<Providerstore={store}>');
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})()
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);
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```
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`DisplayMessages` debe renderizarse como hijo de `AppWrapper`.
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```js
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assert(
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(function () {
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const mockedComponent = Enzyme.mount(React.createElement(AppWrapper));
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return (
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mockedComponent.find('AppWrapper').find('DisplayMessages').length === 1
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);
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})()
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);
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```
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El componente `DisplayMessages` debe renderizar un elemento `h2`, `input`, `button` y `ul`.
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```js
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assert(
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(function () {
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const mockedComponent = Enzyme.mount(React.createElement(AppWrapper));
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return (
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mockedComponent.find('div').length === 1 &&
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mockedComponent.find('h2').length === 1 &&
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mockedComponent.find('button').length === 1 &&
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mockedComponent.find('ul').length === 1
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);
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})()
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);
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```
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# --seed--
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## --after-user-code--
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```jsx
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ReactDOM.render(<AppWrapper />, document.getElementById('root'))
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```
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## --seed-contents--
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```jsx
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// Redux:
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const ADD = 'ADD';
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const addMessage = (message) => {
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return {
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type: ADD,
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message
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}
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};
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const messageReducer = (state = [], action) => {
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switch (action.type) {
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case ADD:
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return [
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...state,
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action.message
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];
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default:
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return state;
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}
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};
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const store = Redux.createStore(messageReducer);
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// React:
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class DisplayMessages extends React.Component {
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constructor(props) {
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super(props);
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this.state = {
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input: '',
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messages: []
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}
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this.handleChange = this.handleChange.bind(this);
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this.submitMessage = this.submitMessage.bind(this);
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}
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handleChange(event) {
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this.setState({
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input: event.target.value
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});
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}
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submitMessage() {
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this.setState((state) => {
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const currentMessage = state.input;
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return {
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input: '',
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messages: state.messages.concat(currentMessage)
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};
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});
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}
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render() {
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return (
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<div>
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<h2>Type in a new Message:</h2>
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<input
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value={this.state.input}
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onChange={this.handleChange}/><br/>
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<button onClick={this.submitMessage}>Submit</button>
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<ul>
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{this.state.messages.map( (message, idx) => {
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return (
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<li key={idx}>{message}</li>
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)
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})
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}
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</ul>
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</div>
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);
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}
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};
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const Provider = ReactRedux.Provider;
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class AppWrapper extends React.Component {
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// Render the Provider below this line
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// Change code above this line
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};
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```
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# --solutions--
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```jsx
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// Redux:
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const ADD = 'ADD';
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const addMessage = (message) => {
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return {
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type: ADD,
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message
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}
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};
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const messageReducer = (state = [], action) => {
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switch (action.type) {
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case ADD:
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return [
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...state,
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action.message
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];
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default:
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return state;
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}
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};
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const store = Redux.createStore(messageReducer);
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// React:
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class DisplayMessages extends React.Component {
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constructor(props) {
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super(props);
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this.state = {
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input: '',
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messages: []
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}
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this.handleChange = this.handleChange.bind(this);
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this.submitMessage = this.submitMessage.bind(this);
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}
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handleChange(event) {
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this.setState({
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input: event.target.value
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});
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}
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submitMessage() {
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this.setState((state) => {
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const currentMessage = state.input;
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return {
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input: '',
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messages: state.messages.concat(currentMessage)
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};
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});
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}
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render() {
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return (
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<div>
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<h2>Type in a new Message:</h2>
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<input
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value={this.state.input}
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onChange={this.handleChange}/><br/>
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<button onClick={this.submitMessage}>Submit</button>
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<ul>
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{this.state.messages.map( (message, idx) => {
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return (
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<li key={idx}>{message}</li>
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)
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})
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}
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</ul>
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</div>
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);
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}
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};
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const Provider = ReactRedux.Provider;
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class AppWrapper extends React.Component {
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// Change code below this line
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render() {
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return (
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<Provider store = {store}>
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<DisplayMessages/>
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</Provider>
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);
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}
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// Change code above this line
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};
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```
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