uTools-Manuals/docs/javascript/Reference/Global_Objects/Error/message.html

<article id="wikiArticle">
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<h2 id="Summary" name="Summary">概述</h2>
<p><code><strong>message</strong></code> 属性是有关错误信息，人类易读的（human-readable）描述。</p>
<h2 id="Description" name="Description">描述</h2>
<p>如果该属性已经被设置，则该属性包含了错误的一个简短描述。<a href="/en-US/docs/Mozilla/Projects/SpiderMonkey">SpiderMonkey</a> 大量应用 <code>message</code> 属性在异常方面。 <code>message</code> 属性结合 <a href="Reference/Global_Objects/Error/name" title='name 属性表示error类型的名称.初始值为"Error".'><code>name</code></a> 属性一起被  <a href="Reference/Global_Objects/Error/toString" title="toString() 方法返回一个指定的错误对象（Error object）的字符串表示。"><code>Error.prototype.toString()</code></a> 方法用来创建错误的字符串形式。</p>
<p>默认情况下，<code>message</code> 属性是一个空字符串，但是可以通过指定一段信息作为 <a href="Reference/Global_Objects/Error" title="通过Error的构造器可以创建一个错误对象。当运行时错误产生时，Error的实例对象会被抛出。Error对象也可用于用户自定义的异常的基础对象。下面列出了各种内建的标准错误类型。"><code>Error constructor</code></a> 的第一个参数创建一个实例来改变该属性值。</p>
<h2 id="Examples" name="Examples">示例</h2>
<h3 id="Example:_Throwing_a_custom_error" name="Example:_Throwing_a_custom_error">例子：抛出一个自定义错误</h3>
<pre><code  class="language-javascript">var e = new Error("Could not parse input"); // e.message is "Could not parse input"
throw e;
</code></pre>
<h2 id="规范">规范</h2>
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<th scope="col">规范版本</th>
<th scope="col">规范状态</th>
<th scope="col">注解</th>
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<tr>
<td>ECMAScript 1st Edition.</td>
<td>Standard</td>
<td>Initial definition.</td>
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<td><a class="external" href="https://www.ecma-international.org/ecma-262/5.1/#sec-15.11.4.3" hreflang="en" lang="en" rel="noopener">ECMAScript 5.1 (ECMA-262)<br/><small lang="zh-CN">Error.prototype.message</small></a></td>
<td><span class="spec-Standard">Standard</span></td>
<td> </td>
</tr>
<tr>
<td><a class="external" href="https://www.ecma-international.org/ecma-262/6.0/#sec-error.prototype.message" hreflang="en" lang="en" rel="noopener">ECMAScript 2015 (6th Edition, ECMA-262)<br/><small lang="zh-CN">Error.prototype.message</small></a></td>
<td><span class="spec-Standard">Standard</span></td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p></p><div class="blockIndicator warning"><strong><a class="external" href="https://github.com/mdn/browser-compat-data" rel="noopener">We're converting our compatibility data into a machine-readable JSON format</a></strong>.
            This compatibility table still uses the old format,
            because we haven't yet converted the data it contains.
            <strong><a class="new" href="/zh-CN/docs/MDN/Contribute/Structures/Compatibility_tables" rel="nofollow">Find out how you can help!</a></strong></div>
<div class="htab">
<a id="AutoCompatibilityTable" name="AutoCompatibilityTable"></a>
<ul>
<li class="selected"><a>Desktop</a></li>
<li><a>Mobile</a></li>
</ul>
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<div id="compat-desktop">
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<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
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<td>Basic support</td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
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<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><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
</tr>
</tbody>
</table>
</div>
<h2 id="See_also" name="See_also">相关链接</h2>
<ul>
<li><a href="Reference/Global_Objects/Error/name" title='name 属性表示error类型的名称.初始值为"Error".'><code>Error.prototype.name</code></a></li>
<li><a href="Reference/Global_Objects/Error/toString" title="toString() 方法返回一个指定的错误对象（Error object）的字符串表示。"><code>Error.prototype.toString()</code></a></li>
</ul>
</article>