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diff --git a/files/zh-cn/web/javascript/reference/global_objects/math/log10e/index.html b/files/zh-cn/web/javascript/reference/global_objects/math/log10e/index.html new file mode 100644 index 0000000000..3a929935f1 --- /dev/null +++ b/files/zh-cn/web/javascript/reference/global_objects/math/log10e/index.html @@ -0,0 +1,99 @@ +--- +title: Math.LOG10E +slug: Web/JavaScript/Reference/Global_Objects/Math/LOG10E +translation_of: Web/JavaScript/Reference/Global_Objects/Math/LOG10E +--- +<div> + {{JSRef("Global_Objects", "Math")}}</div> +<h2 id="Summary" name="Summary">概述</h2> +<p><code><strong>Math.LOG10E</strong></code> 属性表示以 10 为底数,e 的对数,约为 0.434:</p> +<p><math display="block"><semantics><mrow><mstyle mathvariant="monospace"><mi>Math.LOG10E</mi></mstyle><mo>=</mo><msub><mo lspace="0em" rspace="0em">log</mo><mn>10</mn></msub><mo stretchy="false">(</mo><mi>e</mi><mo stretchy="false">)</mo><mo>≈</mo><mn>0.434</mn></mrow><annotation encoding="TeX">\mathtt{\mi{Math.LOG10E}} = \log_10(e) \approx 0.434</annotation></semantics></math></p> +<div> + {{js_property_attributes(0,0,0)}}</div> +<h2 id="Description" name="Description">描述</h2> +<p>由于 <code>LOG10E</code> 是 <code>Math</code> 的静态属性,所以应该像这样使用:<code>Math.LOG10E</code>,而不是作为你创建的 <code>Math</code> 实例的属性(<code>Math</code> 不是一个构造函数)。</p> +<h2 id="Examples" name="Examples">示例</h2> +<h3 id="Example:_Using_Math.LOG10E" name="Example:_Using_Math.LOG10E">例子:使用 <code>Math.LOG10E</code></h3> +<p>下面的函数返回以 10为底数,E的对数:</p> +<pre class="brush:js">function getLog10e() { + return Math.LOG10E +} + +getLog10e() // 0.4342944819032518</pre> +<h2 id="规范">规范</h2> +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">规范版本</th> + <th scope="col">规范状态</th> + <th scope="col">注解</th> + </tr> + <tr> + <td>ECMAScript 1st Edition. Implemented in JavaScript 1.0</td> + <td>Standard</td> + <td>Initial definition.</td> + </tr> + <tr> + <td>{{SpecName('ES5.1', '#sec-15.8.1.5', 'Math.LOG10E')}}</td> + <td>{{Spec2('ES5.1')}}</td> + <td> </td> + </tr> + <tr> + <td>{{SpecName('ES6', '#sec-math.log10e', 'Math.LOG10E')}}</td> + <td>{{Spec2('ES6')}}</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() }}</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>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> + </tr> + </tbody> + </table> +</div> +<h2 id="See_also" name="See_also">相关链接</h2> +<ul> + <li>The {{jsxref("Global_Objects/Math", "Math")}} object it belongs to.</li> +</ul> |