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CalculadoraProps.html
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<html>
<head>
<!-- Adicionar o React. -->
<!-- Nota: ao fazer o deploy, substitua "development.js" por "production.min.js". -->
<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>
<!-- Babel-->
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
<style>
/*REINICIAR BORDER-BOX*/
html {
box-sizing: border-box;
}
*, *::before, *:after {
box-sizing: inherit;
}
body {
background-color: #121212;
font-family: sans-serif;
margin: 0;
}
.header {
background-color: #333;
text-align: center;
color: white;
padding: 16px;
border-radius: 4px;
}
.calculator {
background-color: #FFF;
margin: 40px auto;
max-width: 400px;
padding: 16px;
border-radius: 4px;
}
.display {
width: 100%;
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1.2em;
}
.keyboard {
display: grid;
grid-template-columns: repeat(3, 1fr); /* 1 frame */
grid-gap: 16px;
font-size: 1.2em;
margin-top: 16px;
font-weight: bold;
}
button {
border: 0;
border-radius: 4px;
background-color: #efefef;
padding: 8px;
cursor: pointer;
}
</style>
<script type="text/babel">
const Header = () => <div className="header">CALCULADOR</div>
const Button = (props) => (
<button
value={props.value}
onClick={() => {
props.onNumberClick(props.value);
}}
>
{props.value}
</button>
)
const Calculator = () => {
const [display, setDisplay] = React.useState('');
const handleNumberClick = (value) => {
setDisplay(`${display}${value}`);
}
return (
<div className="calculator">
<div className="display">
{display}
</div>
<div className="keyboard">
<Button value='7' onNumberClick={handleNumberClick} />
<Button value='8' onNumberClick={handleNumberClick} />
<Button value='9' onNumberClick={handleNumberClick} />
<Button value='4' onNumberClick={handleNumberClick} />
<Button value='5' onNumberClick={handleNumberClick} />
<Button value='6' onNumberClick={handleNumberClick} />
<Button value='1' onNumberClick={handleNumberClick} />
<Button value='2' onNumberClick={handleNumberClick} />
<Button value='3' onNumberClick={handleNumberClick} />
<Button value='0' onNumberClick={handleNumberClick} />
</div>
</div>
);
}
const App = () => {
return (<div>
<Header />
<Calculator />
</div>);
}
ReactDOM.render(
<App />,
document.getElementById('root'));
</script>
</head>
<body>
<div id="root"></div>
</body>
</html>