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+---
+title: Number.MIN_VALUE
+slug: Web/JavaScript/Reference/Global_Objects/Number/MIN_VALUE
+translation_of: Web/JavaScript/Reference/Global_Objects/Number/MIN_VALUE
+---
+<div>
+ {{JSRef("Global_Objects", "Number")}}</div>
+<h2 id="Summary" name="Summary">概述</h2>
+<p><code><strong>Number.MIN_VALUE</strong></code> 属性表示在 JavaScript 中所能表示的最小的正值。</p>
+<p>{{js_property_attributes(0,0,0)}}</p>
+<h2 id="Description" name="Description">描述</h2>
+<p><code>MIN_VALUE</code> 属性是 JavaScript 里最接近 0 的正值，而不是最小的负值。</p>
+<p><code>MIN_VALUE</code> 的值约为 5e-324。小于 <code>MIN_VALUE</code> ("underflow values") 的值将会转换为 0。</p>
+<p>因为 <code>MIN_VALUE</code> 是 <code>Number</code> 的一个静态属性，因此应该直接使用： <code>Number.MIN_VALUE，</code> 而不是作为一个创建的 <code>Number</code> 实例的属性。</p>
+<h2 id="Examples" name="Examples">示例</h2>
+<h3 id="Example:_Using_MIN_VALUE" name="Example:_Using_MIN_VALUE">例子：使用 <code>MIN_VALUE</code></h3>
+<p>下面的代码里两个数值相除。如果结果大于或等于 <code>MIN_VALUE</code>，则调用 <code>func1</code> 函数；否则，调用 <code>func2</code> 函数。</p>
+<pre class="brush:js">if (num1 / num2 &gt;= Number.MIN_VALUE) {
+    func1();
+} else {
+    func2();
+}</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 1.1</td>
+   <td>Standard</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-15.7.3.3', 'Number.MIN_VALUE')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-number.min_value', 'Number.MIN_VALUE')}}</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>{{jsxref("Number.MAX_VALUE")}}</li>
+</ul>