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92 lines
5.9 KiB
HTML
92 lines
5.9 KiB
HTML
<article id="wikiArticle">
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<div> <div class="blockIndicator nonStandard nonStandardHeader">
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<p><strong><span class="icon-only-inline" title="This API has not been standardized."><i class="icon-warning-sign"> </i></span> 非标准</strong><br/>
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该特性是非标准的，请尽量不要在生产环境中使用它！</p>
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</div></div>
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<p><strong><code>input</code> </strong>非标准属性是正则表达式静态属性，含有正则表达式所匹配的字符串。<code>RegExp.$_</code>是这个属性的别名。</p>
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<h2 id="语法">语法</h2>
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<pre><code class="language-javascript"><var>RegExp</var>.input
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RegExp.$_
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</code></pre>
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<h2 id="描述">描述</h2>
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<p><code>input</code> 属性是静态的，并不是正则表达式独立对象的属性。反之，你应始终将其使用为 <code>RegExp.input</code> 或者 <code>RegExp.$_。</code></p>
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<p>当正则表达式上搜索的字符串发生改变，并且字符串匹配时，<code><strong>input</strong></code> 属性的值会修改。</p>
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<h2 id="示例">示例</h2>
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<h3 id="使用_input_和__">使用 <code>input</code> 和 <code>$_</code></h3>
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<pre><code class="language-javascript">var re = /hi/g;
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re.test('hi there!');
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RegExp.input; // "hi there!"
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re.test('foo'); // 新测试，不匹配
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RegExp.$_; // "hi there!"
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re.test('hi world!'); // 新测试，匹配
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RegExp.$_; // "hi world!"
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</code></pre>
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<h2 id="规范">规范</h2>
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<p>非标准。并不是任何现行规范的一部分。</p>
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<h2 id="浏览器兼容性">浏览器兼容性</h2>
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<div><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>.
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This compatibility table still uses the old format,
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because we haven't yet converted the data it contains.
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<strong><a class="new" href="/zh-CN/docs/MDN/Contribute/Structures/Compatibility_tables" rel="nofollow">Find out how you can help!</a></strong></div>
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<div class="htab">
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<a id="AutoCompatibilityTable" name="AutoCompatibilityTable"></a>
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<ul>
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<li class="selected"><a>Desktop</a></li>
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<li><a>Mobile</a></li>
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</ul>
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</div></div>
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<div id="compat-desktop">
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<table class="compat-table">
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<tbody>
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<tr>
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<th>Feature</th>
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<th>Chrome</th>
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<th>Firefox (Gecko)</th>
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<th>Internet Explorer</th>
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<th>Opera</th>
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<th>Safari</th>
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</tr>
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<tr>
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<td>Basic support</td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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</tr>
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</tbody>
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</table>
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</div>
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<div id="compat-mobile">
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<table class="compat-table">
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<tbody>
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<tr>
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<th>Feature</th>
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<th>Android</th>
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<th>Chrome for Android</th>
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<th>Firefox Mobile (Gecko)</th>
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<th>IE Mobile</th>
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<th>Opera Mobile</th>
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<th>Safari Mobile</th>
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</tr>
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<tr>
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<td>Basic support</td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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</tr>
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</tbody>
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</table>
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</div>
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<h2 id="另见">另见</h2>
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<ul>
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<li><span class="icon-only-inline" title="This API has not been standardized."><i class="icon-warning-sign"> </i></span> <a href="Reference/Global_Objects/RegExp/lastMatch" title="lastMatch 非标准属性是正则表达式的静态和只读属性，含有最后匹配到的字符串。RegExp.$& 是这个属性的别名。"><code>RegExp.lastMatch ($&)</code></a></li>
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<li><span class="icon-only-inline" title="This API has not been standardized."><i class="icon-warning-sign"> </i></span> <a href="Reference/Global_Objects/RegExp/lastParen" title="lastParen 非标准属性是正则表达式的静态和只读属性，包含匹配到的最后一个子串（如果存在）。RegExp.$+是这一属性的别名。"><code>RegExp.lastParen ($+)</code></a></li>
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<li><span class="icon-only-inline" title="This API has not been standardized."><i class="icon-warning-sign"> </i></span> <a href="Reference/Global_Objects/RegExp/leftContext" title="leftContext 非标准属性是正则表达式的静态和只读属性，含有最新匹配的左侧子串。 RegExp.$` 是这个属性的别名。"><code>RegExp.leftContext ($`)</code></a></li>
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<li><span class="icon-only-inline" title="This API has not been standardized."><i class="icon-warning-sign"> </i></span> <a href="Reference/Global_Objects/RegExp/rightContext" title="rightContext 非标准属性是正则表达式的静态和只读属性，含有最新匹配的右侧子串。 RegExp.$' 是这个属性的别名。"><code>RegExp.rightContext ($')</code></a></li>
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<li><span class="icon-only-inline" title="This API has not been standardized."><i class="icon-warning-sign"> </i></span> <a href="Reference/Global_Objects/RegExp/n" title="非标准$1, $2, $3, $4, $5, $6, $7, $8, $9 属性是包含括号子串匹配的正则表达式的静态和只读属性。"><code>RegExp.$1-$9</code></a></li>
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</ul>
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</article> |