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108 lines
9.8 KiB
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<article id="wikiArticle">
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<p></p><p></p>
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<p> <strong><code>[@@matchAll]</code></strong>方法返回对字符串使用正则表达式的所有匹配项。</p>
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<div>{{EmbedInteractiveExample("pages/js/regexp-prototype-@@matchall.html")}}</div>
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<p class="hidden">The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone <a class="external" href="https://github.com/mdn/interactive-examples" rel="noopener">https://github.com/mdn/interactive-examples</a> and send us a pull request.</p>
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<h2 id="语法">语法</h2>
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<pre><code class="language-javascript"><var>regexp</var>[Symbol.matchAll](<var>str</var>)</code></pre>
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<h3 id="参数">参数</h3>
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<dl>
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<dt><code>str</code></dt>
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<dd>一个<a href="Reference/String" title="此页面仍未被本地化, 期待您的翻译!"><code>String</code></a>的匹配对象。</dd>
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</dl>
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<h3 id="返回值">返回值</h3>
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<p>一个<a href="Guide/Iterators_and_Generators">迭代器</a>。</p>
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<h2 id="描述">描述</h2>
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<p>本方法在<a href="Reference/Global_Objects/String/matchAll" title="matchAll() 方法返回一个包含所有匹配正则表达式及分组捕获结果的迭代器。"><code>String.prototype.matchAll()</code></a>中被内部调用。例如，以下两个示例返回相同的结果。</p>
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<pre><code class="language-javascript">'abc'.matchAll(/a/);
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/a/[Symbol.matchAll]('abc');</code></pre>
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<p>本方法用于自定义<code>RegExp</code>子类中的匹配行为。</p>
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<h2 id="示例">示例</h2>
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<h3 id="直接调用">直接调用</h3>
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<p>本方法的使用方法几乎与<a href="Reference/Global_Objects/String/matchAll" title="matchAll() 方法返回一个包含所有匹配正则表达式及分组捕获结果的迭代器。"><code>String.prototype.matchAll()</code></a>相同，除了<code>this</code> 的不同以及参数顺序的的差异。</p>
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<pre><code class="language-javascript">var re = /[0-9]+/g;
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var str = '2016-01-02';
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var result = re[Symbol.matchAll](str);
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console.log(<span class="message-body-wrapper"><span class="message-flex-body"><span class="devtools-monospace message-body"><span class="cm-variable">Array</span>.<span class="cm-property">from</span>(<span class="cm-variable">result</span>, <span class="cm-def">x</span> <span class="cm-operator">=></span> <span class="cm-variable-2">x</span>[<span class="cm-number">0</span>])</span></span></span>);
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// ["2016", "01", "02"]
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</code></pre>
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<h3 id="在子类中使用matchAll">在子类中使用<code>@@matchAll</code></h3>
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<p><a href="Reference/RegExp" title="此页面仍未被本地化, 期待您的翻译!"><code>RegExp</code></a>的子类可以重写<code>[@@matchAll]()</code>方法来修改默认行为。例如，返回一个<a href="Reference/Array" title="REDIRECT Array"><code>Array</code></a>而不是<a href="Guide/Iterators_and_Generators">iterator</a>:</p>
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<pre><code class="language-javascript">class MyRegExp extends RegExp {
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[Symbol.matchAll](str) {
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var result = RegExp.prototype[Symbol.matchAll].call(this, str);
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if (!result) {
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return null;
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} else {
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return Array.from(result);
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}
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}
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}
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var re = new MyRegExp('([0-9]+)-([0-9]+)-([0-9]+)', 'g');
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var str = '2016-01-02|2019-03-07';
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var result = str.matchAll(re);
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console.log(result[0]); // [ "2016-01-02", "2016", "01", "02" ]
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console.log(result[1]); // [ "2019-03-07", "2019", "03", "07" ]
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</code></pre>
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<h2 id="浏览器兼容性">浏览器兼容性</h2>
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<div class="hidden">The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out <a class="external" href="https://github.com/mdn/browser-compat-data" rel="noopener">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</div>
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<p></p><div class="bc-data"><a class="bc-github-link external" href="https://github.com/mdn/browser-compat-data" rel="noopener">Update compatibility data on GitHub</a><table class="bc-table bc-table-js"><thead><tr class="bc-platforms"><td></td><th class="bc-platform-desktop" colspan="6"><span>Desktop</span></th><th class="bc-platform-mobile" colspan="7"><span>Mobile</span></th><th class="bc-platform-server" colspan="1"><span>Server</span></th></tr><tr class="bc-browsers"><td></td><th class="bc-browser-chrome"><span class="bc-head-txt-label bc-head-icon-chrome">Chrome</span></th><th class="bc-browser-edge"><span class="bc-head-txt-label bc-head-icon-edge">Edge</span></th><th class="bc-browser-firefox"><span class="bc-head-txt-label bc-head-icon-firefox">Firefox</span></th><th class="bc-browser-ie"><span class="bc-head-txt-label bc-head-icon-ie">Internet Explorer</span></th><th class="bc-browser-opera"><span class="bc-head-txt-label bc-head-icon-opera">Opera</span></th><th class="bc-browser-safari"><span class="bc-head-txt-label bc-head-icon-safari">Safari</span></th><th class="bc-browser-webview_android"><span class="bc-head-txt-label bc-head-icon-webview_android">Android webview</span></th><th class="bc-browser-chrome_android"><span class="bc-head-txt-label bc-head-icon-chrome_android">Chrome for Android</span></th><th class="bc-browser-edge_mobile"><span class="bc-head-txt-label bc-head-icon-edge_mobile">Edge Mobile</span></th><th class="bc-browser-firefox_android"><span class="bc-head-txt-label bc-head-icon-firefox_android">Firefox for Android</span></th><th class="bc-browser-opera_android"><span class="bc-head-txt-label bc-head-icon-opera_android">Opera for Android</span></th><th class="bc-browser-safari_ios"><span class="bc-head-txt-label bc-head-icon-safari_ios">Safari on iOS</span></th><th class="bc-browser-samsunginternet_android"><span class="bc-head-txt-label bc-head-icon-samsunginternet_android">Samsung Internet</span></th><th class="bc-browser-nodejs"><span class="bc-head-txt-label bc-head-icon-nodejs">Node.js</span></th></tr></thead><tbody><tr><th scope="row"><code>@@matchAll</code></th><td class="bc-supports-yes bc-browser-chrome"><span class="bc-browser-name">Chrome</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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73</td><td class="bc-supports-no bc-browser-edge"><span class="bc-browser-name">Edge</span><abbr class="bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr>
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No</td><td class="bc-supports-yes bc-browser-firefox"><span class="bc-browser-name">Firefox</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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67</td><td class="bc-supports-no bc-browser-ie"><span class="bc-browser-name">IE</span><abbr class="bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr>
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No</td><td class="bc-supports-yes bc-browser-opera"><span class="bc-browser-name">Opera</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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60</td><td class="bc-supports-no bc-browser-safari"><span class="bc-browser-name">Safari</span><abbr class="bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr>
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No</td><td class="bc-supports-yes bc-browser-webview_android"><span class="bc-browser-name">WebView Android</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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73</td><td class="bc-supports-yes bc-browser-chrome_android"><span class="bc-browser-name">Chrome Android</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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73</td><td class="bc-supports-no bc-browser-edge_mobile"><span class="bc-browser-name">Edge Mobile</span><abbr class="bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr>
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No</td><td class="bc-supports-yes bc-browser-firefox_android"><span class="bc-browser-name">Firefox Android</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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67</td><td class="bc-supports-yes bc-browser-opera_android"><span class="bc-browser-name">Opera Android</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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Yes</td><td class="bc-supports-no bc-browser-safari_ios"><span class="bc-browser-name">Safari iOS</span><abbr class="bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr>
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No</td><td class="bc-supports-yes bc-browser-samsunginternet_android"><span class="bc-browser-name">Samsung Internet Android</span><abbr class="bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr>
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Yes</td><td class="bc-supports-no bc-browser-nodejs"><span class="bc-browser-name">nodejs</span><abbr class="bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr>
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No</td></tr></tbody></table><section class="bc-legend" id="sect1"><h3 class="offscreen" id="Legend">Legend</h3><dl><dt><span class="bc-supports-yes bc-supports">
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<abbr class="bc-level bc-level-yes only-icon" title="Full support">
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<span>Full support</span>
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</abbr></span></dt><dd>Full support</dd><dt><span class="bc-supports-no bc-supports">
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<abbr class="bc-level bc-level-no only-icon" title="No support">
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<span>No support</span>
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</abbr></span></dt><dd>No support</dd></dl></section></div><p></p>
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<h2 id="相关链接">相关链接</h2>
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<ul>
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<li><a href="Reference/Global_Objects/String/matchAll" title="matchAll() 方法返回一个包含所有匹配正则表达式及分组捕获结果的迭代器。"><code>String.prototype.matchAll()</code></a></li>
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<li><a class="new" href="Reference/Global_Objects/Symbol/matchAll" rel="nofollow" title="此页面仍未被本地化, 期待您的翻译!"><code>Symbol.matchAll</code></a></li>
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</ul>
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</article> |