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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: CanvasRenderingContext2D.measureText()
+slug: Web/API/CanvasRenderingContext2D/measureText
+tags:
+ - API
+ - Canevas
+ - CanvasRenderingContext2D
+ - Méthode
+ - Reference
+translation_of: Web/API/CanvasRenderingContext2D/measureText
+---
+<div>{{APIRef}}</div>
+
+<p>La méthode <code><strong>CanvasRenderingContext2D</strong></code><strong><code>.measureText()</code></strong> renvoie un objet {{domxref ("TextMetrics")}} qui contient des informations sur le texte mesuré (telle que sa largeur, par exemple).</p>
+
+<h2 id="Syntax" name="Syntax">Syntaxe</h2>
+
+<pre class="syntaxbox"><var><em>ctx</em></var>.measureText(texte);</pre>
+
+<h3 id="Paramètres">Paramètres</h3>
+
+<dl>
+ <dt>texte</dt>
+ <dd>Le texte à mesurer.</dd>
+</dl>
+
+<h3 id="Valeur_retournée">Valeur retournée</h3>
+
+<p>Un objet {{domxref("TextMetrics")}}.</p>
+
+<h2 id="Exemples">Exemples</h2>
+
+<p>Étant donné cet élément {{HTMLElement("canvas")}} :</p>
+
+<pre class="brush: html">&lt;canvas id="canevas"&gt;&lt;/canvas&gt;
+</pre>
+
+<p>vous pouvez obtenir un objet {{domxref("TextMetrics")}} en utilisant le code suivant :</p>
+
+<pre class="brush: js">var canevas = document.getElementById('canevas');
+var ctx = canevas.getContext('2d');
+
+var texte = ctx.measureText('foo'); // objet TextMetrics
+texte.width; // 16;
+</pre>
+
+<h2 id="Spécifications">Spécifications</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Spécification</th>
+ <th scope="col">Statut</th>
+ <th scope="col">Commentaire</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-measuretext", "CanvasRenderingContext2D.measureText")}}</td>
+ <td>{{Spec2('HTML WHATWG')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilité_des_navigateurs">Compatibilité des navigateurs</h2>
+
+<p>{{ CompatibilityTable() }}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Fonctionnalité</th>
+ <th>Chrome</th>
+ <th>Edge</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Support de base</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatIE(9)}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Fonctionnalité</th>
+ <th>Android</th>
+ <th>Chrome pour Android</th>
+ <th>Edge</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Support de base</td>
+ <td>{{CompatVersionUnknown}}</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">Voir aussi</h2>
+
+<ul>
+ <li>L'interface la définissant, {{domxref("CanvasRenderingContext2D")}}.</li>
+ <li>{{domxref("TextMetrics")}}</li>
+</ul>