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authorFlorian Merz <me@fiji-flo.de>2021-02-11 14:45:12 +0100
committerFlorian Merz <me@fiji-flo.de>2021-02-11 14:45:12 +0100
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+---
+title: Number.NEGATIVE_INFINITY
+slug: Web/JavaScript/Referencia/Objectes_globals/Number/NEGATIVE_INFINITY
+translation_of: Web/JavaScript/Reference/Global_Objects/Number/NEGATIVE_INFINITY
+---
+<div>{{JSRef("Global_Objects", "Number")}}</div>
+
+<h2 id="Summary" name="Summary">Resum</h2>
+
+<p>La propietat <strong><code>Number.NEGATIVE_INFINITY</code></strong> representa el valor infinit negatiu.</p>
+
+<p>No fa falta crear un objecte {{jsxref("Global_Objects/Number", "Number")}} per accedir a aquesta propietat estàtica (feu servir <code>Number.NEGATIVE_INFINITY</code>).</p>
+
+<div>{{js_property_attributes(0, 0, 0)}}</div>
+
+<h2 id="Description" name="Description">Descripció</h2>
+
+<p>El valor de <code>Number.NEGATIVE_INFINITY</code> és el mateix que el valor negatiu de la propietat de l'objecte global {{jsxref("Global_Objects/Infinity", "Infinity")}}.</p>
+
+<p>Aquest valor es comporta de forma una mica diferent a l<u>'infinit matemàtic:</u></p>
+
+<ul>
+ <li>Qualsevol valor positiu, incloent {{jsxref("Number.POSITIVE_INFINITY", "POSITIVE_INFINITY")}}, multiplicat per <code>NEGATIVE_INFINITY</code> és <code>NEGATIVE_INFINITY</code>.</li>
+ <li>Qualsevol calor negatiu, incloent <code>NEGATIVE_INFINITY</code>, multiplicat per <code>NEGATIVE_INFINITY</code> és {{jsxref("Number.POSITIVE_INFINITY", "POSITIVE_INFINITY")}}.</li>
+ <li>Zero multiplicat per <code>NEGATIVE_INFINITY</code> és {{jsxref("Global_Objects/NaN", "NaN")}}.</li>
+ <li>{{jsxref("Global_Objects/NaN", "NaN")}} multiplicat per <code>NEGATIVE_INFINITY</code> és {{jsxref("Global_Objects/NaN", "NaN")}}.</li>
+ <li><code>NEGATIVE_INFINITY</code>, dividit per qualsevol valor negatiu excepte <code>NEGATIVE_INFINITY</code>, és {{jsxref("Number.POSITIVE_INFINITY", "POSITIVE_INFINITY")}}.</li>
+ <li><code>NEGATIVE_INFINITY</code>, dividit per qualsevol valor positiu excepte {{jsxref("Number.POSITIVE_INFINITY", "POSITIVE_INFINITY")}}, és <code>NEGATIVE_INFINITY</code>.</li>
+ <li><code>NEGATIVE_INFINITY</code>, dividit tant per <code>NEGATIVE_INFINITY</code>  com per {{jsxref("Number.POSITIVE_INFINITY", "POSITIVE_INFINITY")}}, és {{jsxref("Global_Objects/NaN", "NaN")}}.</li>
+ <li>Qualsevol nombre dividit per <code>NEGATIVE_INFINITY</code> és zero.</li>
+</ul>
+
+<p>Es pot fer serivir la propietat <code>Number.NEGATIVE_INFINITY</code> per indicar una condició d'error que retorna un nombre finit en cas d'èxit. Fixeu-vos, però, que {{jsxref("Global_Objects/isFinite", "isFinite")}} seria més apropiat en aquest cas.</p>
+
+<h2 id="Examples" name="Examples">Exemples</h2>
+
+<h3 id="Exemple_Fer_servir_NEGATIVE_INFINITY">Exemple: Fer servir <code>NEGATIVE_INFINITY</code></h3>
+
+<p><u>En l'exemple següent, a la variable <code>smallNumber</code> se li assigna un valor que és més petit que el valor mínim. Quan la delcaració {{jsxref("Statements/if...else", "if")}} s'executa, <code>smallNumber</code> té el valor <code>-Infinity</code>, així <code>smallNumber</code> s'estableix com a un valor més manegable abans de prosseguir.</u></p>
+
+<pre class="brush: js notranslate">var smallNumber = (-Number.MAX_VALUE) * 2;
+
+if (smallNumber == Number.NEGATIVE_INFINITY) {
+ smallNumber = returnFinite();
+}
+</pre>
+
+<h2 id="Especificacions">Especificacions</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Especificació</th>
+ <th scope="col">Estat</th>
+ <th scope="col">Comentaris</th>
+ </tr>
+ <tr>
+ <td>1a edició de ECMAScript.</td>
+ <td>Estàndard</td>
+ <td>Definició inicial. Implementat en JavaScript 1.1.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.7.3.5', 'Number.NEGATIVE_INFINITY')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td></td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-number.negative_infinity', 'Number.NEGATIVE_INFINITY')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilitat_amb_navegadors">Compatibilitat amb navegadors</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Característica</th>
+ <th>Chrome</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Suport bàsic</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Característica</th>
+ <th>Android</th>
+ <th>Chrome for Android</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Suport bàsic</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also" name="See_also">Vegeu també</h2>
+
+<ul>
+ <li>{{jsxref("Number.POSITIVE_INFINITY")}}</li>
+ <li>{{jsxref("Number.isFinite()")}}</li>
+ <li>{{jsxref("Global_Objects/Infinity", "Infinity")}}</li>
+ <li>{{jsxref("Global_Objects/isFinite", "isFinite()")}}</li>
+</ul>