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+---
+title: Document.caretRangeFromPoint()
+slug: Web/API/Document/caretRangeFromPoint
+translation_of: Web/API/Document/caretRangeFromPoint
+---
+<p>{{APIRef("DOM")}}{{Non-standard_header}} </p>
+
+<p>{{domxref("Document")}} 的 <code><strong>caretRangeFromPoint()</strong></code> 方法返回一个 Range 对象（指定坐标的文档片段）。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush: js">var <em>range</em> = <em>document</em>.caretRangeFromPoint(float <em>x</em>, float <em>y</em>);
+</pre>
+
+<h3 id="返回">返回</h3>
+
+<p>其中一项：</p>
+
+<ul>
+ <li>A {{domxref("Range")}}.</li>
+ <li><code>Null</code>, 若 <strong>x</strong> 或 <strong>y</strong> 不存在、在视图外或在没有文本节点的位置。</li>
+</ul>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>x</dt>
+ <dd>当前视图的横向位置。</dd>
+ <dt>y</dt>
+ <dd>当前视图的纵向位置。</dd>
+</dl>
+
+<h2 id="Example" name="Example">示例</h2>
+
+<p>Basic demo: 点击文档，在点击的位置插入一行。</p>
+
+<h3 id="HTML_Content">HTML Content</h3>
+
+<pre class="brush: html">&lt;p&gt;Lorem ipsum dolor sit amet, consetetur sadipscing elitr,
+sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat,
+sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum.
+Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.&lt;/p&gt;</pre>
+
+<h3 id="JavaScript_Content">JavaScript Content</h3>
+
+<pre class="brush: js">function insertBreakAtPoint(e) {
+
+    var range;
+    var textNode;
+    var offset;
+
+    if (document.caretPositionFromPoint) {
+        range = document.caretPositionFromPoint(e.clientX, e.clientY);
+        textNode = range.offsetNode;
+        offset = range.offset;
+
+    } else if (document.caretRangeFromPoint) {
+        range = document.caretRangeFromPoint(e.clientX, e.clientY);
+        textNode = range.startContainer;
+        offset = range.startOffset;
+    }
+
+    // only split TEXT_NODEs
+    if (textNode &amp;&amp; textNode.nodeType == 3) {
+        var replacement = textNode.splitText(offset);
+        var br = document.createElement('br');
+        textNode.parentNode.insertBefore(br, replacement);
+    }
+}
+
+var paragraphs = document.getElementsByTagName("p");
+for (i=0 ; i &lt; paragraphs.length; i++) {
+    paragraphs[i].addEventListener("click", insertBreakAtPoint, false);
+}</pre>
+
+<p>{{ EmbedLiveSample('Example', '', '', '', 'Web/API/Document/caretRangeFromPoint') }}</p>
+
+<p> </p>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<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>Edge</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatChrome(43.0)}}</td>
+   <td>20+</td>
+   <td>{{CompatNo()}}</td>
+   <td>12</td>
+   <td>15+</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>Firefox OS</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(43.0)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p id="sect1"> </p>