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February 23, 2021 00:22
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Lista de Tarefas - React
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>Document</title> | |
| <link | |
| href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" | |
| rel="stylesheet" | |
| integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" | |
| crossorigin="anonymous" | |
| /> | |
| </head> | |
| <body> | |
| <div class="container"> | |
| <div class="row"> | |
| <div id="app" class="col"></div> | |
| </div> | |
| </div> | |
| <script | |
| src="https://unpkg.com/react@17/umd/react.development.js" | |
| crossorigin | |
| ></script> | |
| <script | |
| src="https://unpkg.com/react-dom@17/umd/react-dom.development.js" | |
| crossorigin | |
| ></script> | |
| <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script> | |
| <script src="tarefas.jsx" type="text/babel"></script> | |
| <script type="text/babel"> | |
| var rootElement = React.createElement(App); | |
| var container = document.querySelector("#app"); | |
| ReactDOM.render(rootElement, container); | |
| </script> | |
| </body> | |
| </html> |
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| function App() { | |
| const [tarefas, setTarefas] = React.useState([]); | |
| const adicionarTarefa = (nomeTarefa) => { | |
| setTarefas([...tarefas, nomeTarefa]); | |
| }; | |
| const removerTarefa = (index) => { | |
| const items = [...tarefas]; | |
| items.splice(index, 1); | |
| setTarefas(items); | |
| } | |
| return ( | |
| <div> | |
| <h3>Lista de Tarefas</h3> | |
| <NovaTarefa adicionarTarefa={adicionarTarefa} /> | |
| <ListaTarefas tarefas={tarefas} removerTarefa={removerTarefa} /> | |
| </div> | |
| ); | |
| } | |
| function NovaTarefa(props) { | |
| const adicionarTarefa = props.adicionarTarefa; | |
| const [nomeTarefa, setNomeTarefa] = React.useState(''); | |
| const handleSubmit = (ev) => { | |
| ev.preventDefault(); | |
| adicionarTarefa(nomeTarefa); | |
| setNomeTarefa(''); | |
| }; | |
| return ( | |
| <form onSubmit={handleSubmit}> | |
| <div className="row"> | |
| <div className="col-auto"> | |
| <label htmlFor="" className="col-form-label"> | |
| Nova Tarefa | |
| </label> | |
| </div> | |
| <div className="col"> | |
| <input type="text" className="form-control" value={nomeTarefa} onChange={ev => setNomeTarefa(ev.target.value)} /> | |
| </div> | |
| <div className="col-auto"> | |
| <button type="submit" className="btn btn-primary">Adicionar</button> | |
| </div> | |
| </div> | |
| </form> | |
| ); | |
| } | |
| function ListaTarefas(props) { | |
| const tarefas = props.tarefas; | |
| const removerTarefa = props.removerTarefa; | |
| if (tarefas.length === 0) return null; | |
| return ( | |
| <ul className="list-group mt-3"> | |
| {tarefas.map((tarefa, index) => ( | |
| <li className="list-group-item" key={index}> | |
| <div className="row"> | |
| <div className="col">{tarefa}</div> | |
| <div className="col-auto"> | |
| <button type="button" className="btn-close" onClick={() => removerTarefa(index)}></button> | |
| </div> | |
| </div> | |
| </li> | |
| ))} | |
| </ul> | |
| ); | |
| } |
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