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+---
+title: Math.log10()
+slug: Web/JavaScript/Reference/Global_Objects/Math/log10
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/log10
+---
+<div>
+<div>{{JSRef("Global_Objects", "Math")}}</div>
+</div>
+
+<h2 id="Summary" name="Summary">概述</h2>
+
+<p><code><strong>Math.log10()</strong></code> 函数返回<span style="color: #4d4e53; line-height: 1.5;">一个数字以 10 为底的对数.</span></p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><code>Math.log10(<em>x</em>)</code></pre>
+
+<h3 id="Parameters" name="Parameters">参数</h3>
+
+<dl>
+ <dt><code>x</code></dt>
+ <dd>任意数字.</dd>
+</dl>
+
+<h2 id="Description" name="Description">描述</h2>
+
+<p>如果传入的参数小于 0, 则返回 NaN.</p>
+
+<h2 id="Examples" name="Examples">示例</h2>
+
+<pre class="brush:js">Math.log10(10)   // 1
+Math.log10(100)  // 2
+Math.log10("100")// 2
+Math.log10(1)    // 0
+Math.log10(0)    // -Infinity
+Math.log10(-2)   // NaN
+Math.log10("foo")// NaN
+</pre>
+
+<h2 id="规范">规范</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('ES6', '#sec-math.log10', 'Math.log10')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition.</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>{{CompatNo}}</td>
+   <td>{{CompatGeckoDesktop("25")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</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>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile("25")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also" name="See_also">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Global_Objects/Math", "Math")}} 对象.</li>
+</ul>