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---
title: CanvasRenderingContext2D.scrollPathIntoView()
slug: Web/API/CanvasRenderingContext2D/scrollPathIntoView
translation_of: Web/API/CanvasRenderingContext2D/scrollPathIntoView
---
<div>{{APIRef}} {{SeeCompatTable}}</div>
<p><code><strong>CanvasRenderingContext2D</strong></code><strong><code>.scrollPathIntoView()</code></strong> 是 Canvas 2D API 将当前或给定的路径滚动到窗口的方法。类似于 {{domxref("Element.scrollIntoView()")}}。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">void <var><em>ctx</em>.scrollPathIntoView();<var>
void <var><em>ctx</em>.<var>scrollPathIntoView</var>(path);</var></var></var>
</pre>
<h3 id="参数">参数</h3>
<dl>
<dt><code>path</code></dt>
<dd>使用的{{domxref("Path2D")}} 路径。</dd>
</dl>
<h2 id="示例">示例</h2>
<h3 id="使用_scrollPathIntoView_方法">使用 scrollPathIntoView 方法</h3>
<p>这是一段使用 <code>scrollPathIntoView</code> 方法的简单的代码片段。</p>
<h4 id="HTML">HTML</h4>
<pre class="brush: html"><canvas id="canvas"></canvas>
</pre>
<h4 id="JavaScript">JavaScript</h4>
<pre class="brush: js; highlight:[6]">var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
ctx.beginPath();
ctx.fillRect(10, 10, 30, 30);
ctx.scrollPathIntoView();
</pre>
<p>修改下面的代码并在线查看 canvas 的变化：</p>
<div style="display: none;">
<h6 id="Playable_code">Playable code</h6>
<pre class="brush: html"><canvas id="canvas" width="400" height="200" class="playable-canvas">
<input id="button" type="range" min="1" max="12">
</canvas>
<div class="playable-buttons">
<input id="edit" type="button" value="Edit" />
<input id="reset" type="button" value="Reset" />
</div>
<textarea id="code" class="playable-code">
ctx.beginPath();
ctx.rect(10, 10, 30, 30);
ctx.scrollPathIntoView();</textarea>
</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="规范描述">规范描述</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-scrollpathintoview", "CanvasRenderingContext2D.scrollPathIntoView")}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{CompatibilityTable}}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatVersionUnknown}}[1]</td>
<td>{{CompatNo}}<br>
{{bug(1120401)}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatNo}}</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>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>{{CompatNo}}<br>
{{bug(1120401)}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<h3 id="兼容性注解">兼容性注解</h3>
<ul>
<li>[1] 这个特性受控于特性标识。 设置标识 <code>ExperimentalCanvasFeatures</code> 为 <code>true</code> 进行启用。</li>
</ul>
<h2 id="参见">参见</h2>
<ul>
<li>接口定义， {{domxref("CanvasRenderingContext2D")}}.</li>
<li>{{domxref("Element.scrollIntoView()")}}</li>
</ul>
|
