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# Correctif « meter » (compteur)

- Documentation
- Questions ou commentaires?

## But

L'élément « `meter` » de HTML5 affiche une mesure scalaire dans une gamme connue. Étant donné que certains navigateurs ne prennent pas en charge cette fonctionnalité à l'origine, ce correctif émule la même fonctionnalité en utilisant HTML générique et WAI-ARIA.

### Description qui est inclus dans HTML5

> The `meter` element represents a scalar measurement within a known range, or a fractional value; for example disk usage, the relevance of a query result, or the fraction of a voting population to have selected a particular candidate.

> This is also known as a gauge.

> The `meter` element should not be used to indicate progress (as in a progress bar). For that role, HTML provides a separate `progress` element.

> The `meter` element also does not represent a scalar value of arbitrary range — for example, it would be wrong to use this to report a weight, or height, unless there is a known maximum value.

## Exemples

Description | Min | Low | Value | Max | High | Résultat
--- | --- | --- | --- | --- | --- | ---
Normal (75%) | 20 | n/a | 65 | 80 | n/a | 75 % (normal)
Trop haut (90%) | 0 | n/a | 90 | 100 | 80 | 90 % (trop haut)
Trop bas (15 %) | 100 | 120 | 115 | 200 | 180 | 15 % (trop bas)
|  | 150

View code

### HTML

    <table class="table table-striped">
    	<thead>
    		<tr>
    			<th scope="col">Description</th>
    			<th scope="col" lang="en">Min</th>
    			<th scope="col" lang="en">Low</th>
    			<th scope="col" lang="en">Value</th>
    			<th scope="col" lang="en">Max</th>
    			<th scope="col" lang="en">High</th>
    			<th scope="col">Résultat</th>
    		</tr>
    	</thead>
    	<tbody>
    		<tr>
    			<td>Normal (75%)</td>
    			<td>20</td>
    			<td>n/a</td>
    			<td>65</td>
    			<td>80</td>
    			<td>n/a</td>
    			<td><meter min="20" value="65" max="80">75 % (normal)</meter></td>
    		</tr>
    		<tr>
    			<td>Trop haut (90%)</td>
    			<td>0</td>
    			<td>n/a</td>
    			<td>90</td>
    			<td>100</td>
    			<td>80</td>
    			<td><meter min="0" value="90" max="100" high="80">90 % (trop haut)</meter></td>
    		</tr>
    		<tr>
    			<td>Trop bas (15 %)</td>
    			<td>100</td>
    			<td>120</td>
    			<td>115</td>
    			<td>200</td>
    			<td>180</td>
    			<td><meter min="100" low="120" value="115" max="200" high="180">15 % (trop bas)</meter></td>
    		</tr>
    		<tr>
    			<td colspan="3"><button class="btn btn-default" id="decreaseMeter" type="button">Diminuer</button></td>
    			<td colspan="3"><button class="btn btn-default" id="increaseMeter" type="button">Augmenter</button></td>
    			<td><meter id="updateTest" min="100" low="120" value="150" max="200" high="180"><span class="wb-inv">150</span></meter>
    		</tr>
    	</tbody>
    </table>

### JavaScript (démo seulement)

    (function( $, wb ) {
    "use strict";

    $( document ).on( "click vclick", "#increaseMeter, #decreaseMeter", function( event ) {
    	var $elm = $( "#updateTest" ),
    		increase = event.currentTarget.id === "increaseMeter",
    		valuenow = parseInt( $elm.attr( "value" ), 10 ),
    		limit = parseInt( $elm.attr( increase ? "max" : "min" ), 10 ),
    		change = increase ? 1 : -1,
    		newValue = valuenow === limit ? 0 : valuenow + change;

    	$elm
    		.attr( "value", newValue )
    		.find( "span" )
    			.text( newValue );

    	// Update the visuals
    	$elm.trigger( "wb-update.wb-meter" );
    });

    })( jQuery, wb );

Date de modification :
  2014-07-20