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+---
+title: CanvasRenderingContext2D.rect()
+slug: Web/API/CanvasRenderingContext2D/rect
+tags:
+  - API
+  - Canvas
+  - CanvasRenderingContext2D
+  - Referencia
+  - metodo
+translation_of: Web/API/CanvasRenderingContext2D/rect
+---
+<div>{{APIRef}}</div>
+
+<p>O método <code><strong>CanvasRenderingContext2D</strong></code><strong><code>.rect()</code></strong> da Canvas 2D API cria um <em>path </em>(trajeto) para um retângulo na posição <em>(x, y)</em>, cujo tamanho é determinado pelo <em>width </em>(largura) e <em>height</em> (altura). <span id="result_box" lang="pt"><span>Esses quatro pontos estão conectados por linhas retas e o </span></span> <em>sub-path</em> <span lang="pt"><span>(sub-</span></span>trajeto<span lang="pt"><span>) é marcado como fechado, para que você possa</span></span> <code>fill (preencher)</code> ou <code>stroke (contornar)</code> o retângulo.</p>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox">void <var><em>ctx</em>.rect(x, y, width, height);</var>
+</pre>
+
+<h3 id="Parameters">Parameters</h3>
+
+<dl>
+ <dt><code>x</code></dt>
+ <dd>O valor da coordenada x que indica ponto de início (superior esquerdo) do retângulo.</dd>
+ <dt><code>y</code></dt>
+ <dd>O valor da coordenada y que indica ponto de início (superior esquerdo) do retângulo.</dd>
+ <dt><code>width</code></dt>
+ <dd>A largura do retângulo.</dd>
+ <dt><code>height</code></dt>
+ <dd>A altura do retângulo.</dd>
+</dl>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<h3 id="Usando_o_método_rect">Usando o método <code>rect</code></h3>
+
+<p>Isto é somente um simples fragmentode código que usa o método <code>rect</code> para criar um <em>path</em>. Para verdadeiramente desenhar um <em>path </em>no canvas, você pode usar o método {{domxref("CanvasRenderingContext2D.fill", "fill()")}} ou o {{domxref("CanvasRenderingContext2D.stroke", "stroke()")}}. Veja também os métodos {{domxref("CanvasRenderingContext2D.fillRect", "fillRect()")}} e {{domxref("CanvasRenderingContext2D.strokeRect", "strokeRect()")}}, que podem fazer isto em um único passo.</p>
+
+<h4 id="HTML">HTML</h4>
+
+<pre class="brush: html">&lt;canvas id="canvas"&gt;&lt;/canvas&gt;
+</pre>
+
+<h4 id="JavaScript">JavaScript</h4>
+
+<pre class="brush: js; highlight:[3]">var canvas = document.getElementById('canvas');
+var ctx = canvas.getContext('2d');
+ctx.rect(10, 10, 100, 100);
+ctx.fill();
+</pre>
+
+<p>Edite o código abaixo e veja as alterações instantâneas no canvas:</p>
+
+<div style="display: none;">
+<h6 id="Playable_code">Playable code</h6>
+
+<pre class="brush: html">&lt;canvas id="canvas" width="400" height="200" class="playable-canvas"&gt;&lt;/canvas&gt;
+&lt;div class="playable-buttons"&gt;
+  &lt;input id="edit" type="button" value="Edit" /&gt;
+  &lt;input id="reset" type="button" value="Reset" /&gt;
+&lt;/div&gt;
+&lt;textarea id="code" class="playable-code"&gt;
+ctx.rect(10, 10, 100, 100);
+ctx.fill();&lt;/textarea&gt;
+</pre>
+
+<pre class="brush: js">var canvas = document.getElementById("canvas");
+var ctx = canvas.getContext("2d");
+var textarea = document.getElementById("code");
+var reset = document.getElementById("reset");
+var edit = document.getElementById("edit");
+var code = textarea.value;
+
+function drawCanvas() {
+  ctx.clearRect(0, 0, canvas.width, canvas.height);
+  eval(textarea.value);
+}
+
+reset.addEventListener("click", function() {
+  textarea.value = code;
+  drawCanvas();
+});
+
+edit.addEventListener("click", function() {
+  textarea.focus();
+})
+
+textarea.addEventListener("input", drawCanvas);
+window.addEventListener("load", drawCanvas);
+</pre>
+</div>
+
+<p>{{ EmbedLiveSample('Playable_code', 700, 360) }}</p>
+
+<h2 id="Especificações">Especificações</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Especificação</th>
+   <th scope="col">Estado</th>
+   <th scope="col">Comentário</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-rect", "CanvasRenderingContext2D.rect")}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilidade_em_Navegadores">Compatibilidade em Navegadores</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Característica</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</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>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</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="Veja_também">Veja também</h2>
+
+<ul>
+ <li><span class="short_text" id="result_box" lang="pt"><span>A interface que a define</span></span>, {{domxref("CanvasRenderingContext2D")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.fillRect")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.strokeRect()")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.fill()")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.stroke()")}}</li>
+</ul>