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+---
+title: CanvasRenderingContext2D.fillRect()
+slug: Web/API/CanvasRenderingContext2D/fillRect
+translation_of: Web/API/CanvasRenderingContext2D/fillRect
+---
+<div>{{APIRef}}</div>
+
+<p><span class="seoSummary"><code><strong>CanvasRenderingContext2D</strong></code><strong><code>.fillRect()</code></strong> は座標 <em>(<code>x</code>, <code>y</code>)</em> を始点に、大きさ<code>(width</code>, <code>height</code>) の領域を塗りつぶします。塗りつぶす様式は <code>fillStyle</code> 属性に従います。</span></p>
+
+<h2 id="文法">文法</h2>
+
+<pre class="syntaxbox">void <var><em>ctx</em>.fillRect(x, y, width, height);</var>
+</pre>
+
+<h3 id="Parameters">Parameters</h3>
+
+<dl>
+ <dt><code>x</code></dt>
+ <dd>矩形領域の始点のうち、X座標を指定します。</dd>
+ <dt><code>y</code></dt>
+ <dd>矩形領域の始点のうち、Y座標を指定します。</dd>
+ <dt><code>width</code></dt>
+ <dd>矩形領域の横幅を指定します。</dd>
+ <dt><code>height</code></dt>
+ <dd>矩形領域の高さを指定します。</dd>
+</dl>
+
+<h2 id="使用例">使用例</h2>
+
+<h3 id="fillRect_の使い方"><code>fillRect</code> の使い方</h3>
+
+<p><code>fillRect</code> メソッドを利用した簡単な使用例です。</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:[4]">var canvas = document.getElementById('canvas');
+var ctx = canvas.getContext('2d');
+ctx.fillStyle = 'green';
+ctx.fillRect(10, 10, 100, 100);
+
+// キャンバス全体を塗りつぶすには、以下のようにします。
+// ctx.fillRect(0, 0, canvas.width, canvas.height);
+</pre>
+
+<p>以下のコードを編集して、変更がどのように適用されるか試してみてください。</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.fillStyle = "green";
+ctx.fillRect(10, 10, 100, 100);&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="仕様">仕様</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-fillrect", "CanvasRenderingContext2D.fillRect")}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="ブラウザ間の互換性">ブラウザ間の互換性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</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>Feature</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="関連項目">関連項目</h2>
+
+<ul>
+ <li>このメソッドを定義するインターフェイスである {{domxref("CanvasRenderingContext2D")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.fillStyle")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.clearRect()")}}</li>
+ <li>{{domxref("CanvasRenderingContext2D.strokeRect()")}}</li>
+</ul>