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语法高亮，滚动条美化，设置页面调整

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2019-04-19 02:41:09 +08:00
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docs/javascript/Reference/Errors/Getter_only.html
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@@ -1,16 +1,16 @@
<article id="wikiArticle">
<div></div>
<h2 id="错误提示">错误提示</h2>
<pre class="syntaxbox">TypeError: setting getter-only property "x" (Firefox)
<pre><code class="language-javascript">TypeError: setting getter-only property "x" (Firefox)
TypeError: Cannot set property "prop" of #&lt;Object&gt; which has only a getter (Chrome)
</pre>
</code></pre>
<h2 id="错误类型">错误类型</h2>
<p>仅在<a href="/en-US/docs/Web/JavaScript/Reference/Strict_mode">严格模式</a>下报 <a href="Reference/Global_Objects/TypeError" title="TypeError（类型错误） 对象用来表示值的类型非预期类型时发生的错误。"><code>TypeError</code></a> 错误。</p>
<h2 id="哪里出错了？">哪里出错了？</h2>
<p>该错误提示出现于试图给一个仅仅设置了 <a href="/en-US/docs/Web/JavaScript/Reference/Functions/get">getter</a> 特性的属性赋新值的时候。在非严格模式下会被静默忽略，而在<a href="/en-US/docs/Web/JavaScript/Reference/Strict_mode">严格模式</a>下会报 <a href="Reference/Global_Objects/TypeError" title="TypeError（类型错误） 对象用来表示值的类型非预期类型时发生的错误。"><code>TypeError</code></a> 错误。</p>
<h2 id="示例">示例</h2>
<p>下面的例子展示了如何为一个属性设置 getter 特性。由于没有设置 <a href="/en-US/docs/Web/JavaScript/Reference/Functions/set">setter</a> 特性，所以在试图将 temperature 属性值设置为 30 的时候会报 TypeError 的错误。相关细节信息可以参考 <a href="Reference/Global_Objects/Object/defineProperty" title="Object.defineProperty() 方法会直接在一个对象上定义一个新属性，或者修改一个对象的现有属性， 并返回这个对象。"><code>Object.defineProperty()</code></a> 页面。</p>
<pre class="brush: js example-bad">"use strict";
<pre><code class="language-js example-bad">"use strict";
function Archiver() {
var temperature = null;
@@ -26,9 +26,9 @@ var arc = new Archiver();
arc.temperature; // 'get!'
arc.temperature = 30;
// TypeError: setting getter-only property "temperature"</pre>
// TypeError: setting getter-only property "temperature"</code></pre>
<p>至于修复问题的方法，可以将第 16 行的代码移除，因为它试图为 temperature 属性赋值，或者是为它添加一个 <a href="/en-US/docs/Web/JavaScript/Reference/Functions/set">setter</a> 特性，就像下面这样：</p>
<pre class="brush: js example-good highlight[12]">"use strict";
<pre><code class="language-js example-good highlight[12]">"use strict";
function Archiver() {
var temperature = null;
@@ -52,7 +52,7 @@ var arc = new Archiver();
arc.temperature; // 'get!'
arc.temperature = 11;
arc.temperature = 13;
arc.getArchive(); // [{ val: 11 }, { val: 13 }]</pre>
arc.getArchive(); // [{ val: 11 }, { val: 13 }]</code></pre>
<h2 id="相关内容">相关内容</h2>
<ul>
<li><a href="Reference/Global_Objects/Object/defineProperty" title="Object.defineProperty() 方法会直接在一个对象上定义一个新属性，或者修改一个对象的现有属性， 并返回这个对象。"><code>Object.defineProperty()</code></a></li>