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April 17, 2020 01:11
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Handling multi select using ReactJS
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import React, { Component } from 'react'; | |
class App extends Component { | |
state = { | |
elementos: ['1', '2'] | |
} | |
componentDidMount () { | |
console.log('carregado: ', this.state.elementos); | |
} | |
handleMultiSelect = event => { | |
let options = event.target.options; | |
let value = []; | |
for (let i = 0, l = options.length; i < l; i++) { | |
if (options[i].selected) { | |
value.push(options[i].value); | |
} | |
} | |
console.log('escolhido: ', value); | |
this.setState({ | |
elementos: value | |
}); | |
} | |
render () { | |
return ( | |
<div className="App"> | |
<header className="App-header"> | |
<form> | |
<select value={this.state.elementos} onChange={this.handleMultiSelect} multiple={true} name="lista" size={5}> | |
<option value="0">ZERO</option> | |
<option value="1">UM</option> | |
<option value="2">DOIS</option> | |
<option value="3">TRES</option> | |
<option value="4">QUATRO</option> | |
</select> | |
</form> | |
</header> | |
</div> | |
); | |
} | |
} | |
export default App; |
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