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---
title: Window.screenX
slug: Web/API/Window/screenX
tags:
  - API
  - Propriété
  - Window
  - lecture seule
translation_of: Web/API/Window/screenX
---
<div>{{APIRef}}</div>

<p>La propriété  <code><strong>Window.screenX</strong></code> retourne la distance honrizontale, in CSS pixels, of the left border of the user's browser from the left side of the screen.</p>

<h2 id="Syntax" name="Syntax">Syntax</h2>

<pre class="syntaxbox"><em>lLoc</em> = window.screenX
</pre>

<ul>
 <li><em><code>lLoc</code></em> is the number of CSS pixels from the left side the screen.</li>
</ul>

<h2 id="Specifications" name="Specifications">Specifications</h2>

<table class="standard-table" style="height: 49px; width: 1000px;">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Commentaire</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{ SpecName('CSSOM View', '#dom-window-screenx', 'Window.screenX') }}</td>
   <td>{{ Spec2('CSSOM View') }}</td>
   <td>Définition initiale</td>
  </tr>
 </tbody>
</table>

<h2 id="Compatibilité_avec_les_navigateurs">Compatibilité avec les navigateurs</h2>

<p>{{ CompatibilityTable() }}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Fonctionnalitée</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Support basic</td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }} [1]</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>Fonctionnalitée</th>
   <th>Android</th>
   <th>Chrome pour Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Support basic</td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }} [1]</td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] Avant Firefox 28, Gecko utilisait les dimensions de l'appareil au lieu des pixels CSS ; dans d'autres mots, it was assuming a value of <code>screenPixelsPerCSSPixel</code> of 1 for any device.</p>

<h2 id="Voir_aussi">Voir aussi</h2>

<ul>
 <li>{{domxref("Window.screenY")}}</li>
</ul>