pikachu
54
Q:

html select

<!-- O segundo valor estará selecionado inicialmente -->
<select name="select">
  <option value="valor1">Valor 1</option> 
  <option value="valor2" selected>Valor 2</option>
  <option value="valor3">Valor 3</option>
</select>
6
<!DOCTYPE html>
<html>
<body>

<h2>The select Element</h2>

<p>The select element defines a drop-down list:</p>

<form action="/action_page.php">
  <label for="cars">Choose a car:</label>
  <select id="cars" name="cars">
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
    <option value="fiat">Fiat</option>
    <option value="audi">Audi</option>
  </select>
  <input type="submit">
</form>

</body>
</html>
9
<!-- C'est la deuxième valeur -->
<!-- qui sera initialement sélectionnée -->
<select id="monselect">
  <option value="valeur1">Valeur 1</option> 
  <option value="valeur2" selected>Valeur 2</option>
  <option value="valeur3">Valeur 3</option>
</select>
4
<html>
 <head>
   <title>Selection Inputs</title>
 </head>
 <body>
   <form>
     <label for="selector"> <!-- Can add label if want -->
       <p>A "select" element allows users to input from a selection:</p>
       <select id="selector"> <!-- Use "select" to create object -->
         <option>Option 1</option> <!-- Add all applicable options -->
         <option>Option 2</option>
         <option selected>Option 3</option> <!-- add selected to change default from first option -->
         <optgroup label="Group"> <!-- To create nested options for categories use "optgroup" -->
           <option>Option 4</option>
           <option>Option 5</option>
       </select>
     </label>
   </form>
 </body>
</html>
5
class FlavorForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {value: 'coconut'};
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }

  handleChange(event) {    this.setState({value: event.target.value});  }
  handleSubmit(event) {
    alert('Your favorite flavor is: ' + this.state.value);
    event.preventDefault();
  }

  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <label>
          Pick your favorite flavor:
          <select value={this.state.value} onChange={this.handleChange}>            <option value="grapefruit">Grapefruit</option>
            <option value="lime">Lime</option>
            <option value="coconut">Coconut</option>
            <option value="mango">Mango</option>
          </select>
        </label>
        <input type="submit" value="Submit" />
      </form>
    );
  }
}
3

    <label for="cars">Choose a car:</label>

<select 
    name="cars" id="cars">

       
      <option value="volvo">Volvo</option>

       
      <option value="saab">Saab</option>

       
      <option value="mercedes">Mercedes</option>

       
      <option value="audi">Audi</option>

      </select>
 
-1

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