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| author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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| committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
| commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
| tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/javascript/reference/global_objects/regexp/@@match/index.html | |
| parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
| download | translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.gz translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.bz2 translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.zip | |
initial commit
Diffstat (limited to 'files/zh-cn/web/javascript/reference/global_objects/regexp/@@match/index.html')
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diff --git a/files/zh-cn/web/javascript/reference/global_objects/regexp/@@match/index.html b/files/zh-cn/web/javascript/reference/global_objects/regexp/@@match/index.html new file mode 100644 index 0000000000..28b4431659 --- /dev/null +++ b/files/zh-cn/web/javascript/reference/global_objects/regexp/@@match/index.html @@ -0,0 +1,109 @@ +--- +title: 'RegExp.prototype[@@match]()' +slug: Web/JavaScript/Reference/Global_Objects/RegExp/@@match +tags: + - JavaScript + - RegExp + - 正则 +translation_of: Web/JavaScript/Reference/Global_Objects/RegExp/@@match +--- +<div>{{JSRef}}</div> + +<p>对<em>正则表达式</em>匹配<em>字符串</em>时,<strong><code>[@@match]()</code></strong>方法用于获取匹配结果。</p> + +<p>{{EmbedInteractiveExample("pages/js/regexp-prototype-@@match.html")}}</p> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox"><var>regexp</var>[Symbol.match](str)</pre> + +<h3 id="参数">参数</h3> + +<dl> + <dt><code>str</code></dt> + <dd>match 的目标参数是{{jsxref("String")}}</dd> +</dl> + +<h3 id="返回值">返回值</h3> + +<p>match 方法会返回一个数组,它包括整个匹配结果,和通过捕获组匹配到的结果,如果没有匹配到则返回null</p> + +<h2 id="描述">描述</h2> + +<p>这个方法在 {{jsxref("String.prototype.match()")}} 的内部调用。例如,下面的两个方法返回相同结果。</p> + +<pre class="brush: js">'abc'.match(/a/); + +/a/[Symbol.match]('abc');</pre> + +<p>这个方法为自定义 <code>RegExp</code> 子类中的匹配行为而存在。</p> + +<h2 id="示例">示例</h2> + +<h3 id="直接调用">直接调用</h3> + +<p>这个方法的使用方式和 {{jsxref("String.prototype.match()")}} 相同,不同之处是 <code>this</code> 和参数顺序。</p> + +<pre class="brush: js">var re = /[0-9]+/g; +var str = '2016-01-02'; +var result = re[Symbol.match](str); +console.log(result); // ["2016", "01", "02"] +</pre> + +<h3 id="在子类中使用match">在子类中使用<code>@@match</code></h3> + +<p>{{jsxref("RegExp")}} 的子类可以覆写 <code>[@@match]()</code>方法来修改默认行为。</p> + +<pre class="brush: js">class MyRegExp extends RegExp { + [Symbol.match](str) { + var result = RegExp.prototype[Symbol.match].call(this, str); + if (!result) return null; + return { + group(n) { + return result[n]; + } + }; + } +} + +var re = new MyRegExp('([0-9]+)-([0-9]+)-([0-9]+)'); +var str = '2016-01-02'; +var result = str.match(re); // String.prototype.match calls re[@@match]. +console.log(result.group(1)); // 2016 +console.log(result.group(2)); // 01 +console.log(result.group(3)); // 02 +</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('ESDraft', '#sec-regexp.prototype-@@match', 'RegExp.prototype[@@match]')}}</td> + <td>{{Spec2('ESDraft')}}</td> + <td></td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<div> +<p>{{Compat("javascript.builtins.RegExp.@@match")}}</p> +</div> + +<h2 id="另见">另见</h2> + +<ul> + <li>{{jsxref("String.prototype.match()")}}</li> + <li>{{jsxref("RegExp.prototype.@@replace()", "RegExp.prototype[@@replace]()")}}</li> + <li>{{jsxref("RegExp.prototype.@@search()", "RegExp.prototype[@@search]()")}}</li> + <li>{{jsxref("RegExp.prototype.@@split()", "RegExp.prototype[@@split]()")}}</li> + <li>{{jsxref("RegExp.prototype.exec()")}}</li> + <li>{{jsxref("RegExp.prototype.test()")}}</li> +</ul> |
