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114 lines
10 KiB
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<article id="wikiArticle">
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<div></div>
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<p> <strong><code>Intl.NumberFormat.prototype.format</code></strong> 属性返回一个根据<a href="Reference/Global_Objects/NumberFormat" title="Intl.NumberFormat是对语言敏感的格式化数字类的构造器类"><code>NumberFormat</code></a>对象的语言环境和格式化选项，来格式化一个数字的getter函数。</p>
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<div><iframe class="interactive interactive-js" frameborder="0" height="250" src="https://interactive-examples.mdn.mozilla.net/pages/js/intl-numberformat-prototype-format.html" width="100%"></iframe></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"><code><var>numberFormat</var>.format(<var>number</var>)</code></code></pre>
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<h3 id="参数">参数</h3>
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<dl>
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<dt><code>number</code></dt>
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<dd>要格式化的数值。</dd>
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</dl>
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<h2 id="描述">描述</h2>
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<p>该函数返回一个根据<a href="Reference/Global_Objects/NumberFormat" title="Intl.NumberFormat是对语言敏感的格式化数字类的构造器类"><code>NumberFormat</code></a>对象的语言环境和格式化选项，来<code>format</code> 一个数字的函数。</p>
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<h2 id="示例">示例</h2>
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<h3 id="使用_format">使用 <code>format</code></h3>
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<p>使用 <code>format</code> 格式化一个单一的货币值, 以俄罗斯为例:</p>
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<pre><code class="language-javascript">var options = { style: 'currency', currency: 'RUB' };
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var numberFormat = new Intl.NumberFormat('ru-RU', options);
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console.log(numberFormat.format(654321.987));
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// → "654 321,99 руб."
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</code></pre>
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<h3 id="使用_format_和_map">使用 <code>format</code> 和 <code>map</code></h3>
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<p>使用 <code>format</code> 返回的函数来格式化数组中的所有数字。注意，该函数绑定到所获得的<a href="Reference/Global_Objects/NumberFormat" title="Intl.NumberFormat是对语言敏感的格式化数字类的构造器类"><code>NumberFormat</code></a>，因此它可以直接传递给<a href="Reference/Global_Objects/Array/map" title="map() 方法创建一个新数组，其结果是该数组中的每个元素都调用一个提供的函数后返回的结果。"><code>Array.prototype.map</code></a>。</p>
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<pre><code class="language-javascript">var a = [123456.789, 987654.321, 456789.123];
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var numberFormat = new Intl.NumberFormat('es-ES');
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var formatted = a.map(numberFormat.format);
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console.log(formatted.join('; '));
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// → "123.456,789; 987.654,321; 456.789,123"
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</code></pre>
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<h2 id="规范">规范</h2>
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<table class="standard-table">
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<tbody>
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<tr>
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<th scope="col">规范</th>
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<th scope="col">状态</th>
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<th scope="col">注解</th>
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</tr>
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<tr>
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<td><a class="external" href="https://www.ecma-international.org/ecma-402/1.0/#sec-11.3.2" hreflang="en" lang="en" rel="noopener">ECMAScript Internationalization API 1.0 (ECMA-402)<br/><small lang="zh-CN">Intl.NumberFormat.prototype.format</small></a></td>
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<td><span class="spec-Standard">Standard</span></td>
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<td>初始定义</td>
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</tr>
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<tr>
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<td><a class="external" href="https://www.ecma-international.org/ecma-402/2.0/#sec-11.3.2" hreflang="en" lang="en" rel="noopener">ECMAScript Internationalization API 2.0 (ECMA-402)<br/><small lang="zh-CN">Intl.NumberFormat.prototype.format</small></a></td>
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<td><span class="spec-Standard">Standard</span></td>
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<td> </td>
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</tr>
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<tr>
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<td><a class="external" href="https://tc39.github.io/ecma402/#sec-Intl.NumberFormat.prototype.format" hreflang="en" lang="en" rel="noopener">ECMAScript Internationalization API 4.0 (ECMA-402)<br/><small lang="zh-CN">Intl.NumberFormat.prototype.format</small></a></td>
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<td><span class="spec-Draft">Draft</span></td>
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<td> </td>
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</tr>
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</tbody>
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</table>
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<h2 id="浏览器兼容性">浏览器兼容性</h2>
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<div>
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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>format</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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24</td><td class="bc-supports-yes bc-browser-edge"><span class="bc-browser-name">Edge</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-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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29</td><td class="bc-supports-yes bc-browser-ie"><span class="bc-browser-name">IE</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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11</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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15</td><td class="bc-supports-yes bc-browser-safari"><span class="bc-browser-name">Safari</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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10</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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Yes</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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26</td><td class="bc-supports-yes bc-browser-edge_mobile"><span class="bc-browser-name">Edge Mobile</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-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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56</td><td class="bc-supports-unknown bc-browser-opera_android"><span class="bc-browser-name">Opera Android</span><abbr title="Compatibility unknown; please update this.">
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?
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</abbr></td><td class="bc-supports-yes bc-browser-safari_ios"><span class="bc-browser-name">Safari iOS</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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10</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-unknown bc-browser-nodejs"><span class="bc-browser-name">nodejs</span><abbr title="Compatibility unknown; please update this.">
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?
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</abbr></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-unknown bc-supports">
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<abbr class="bc-level bc-level-unknown only-icon" title="Compatibility unknown">
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<span>Compatibility unknown</span>
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</abbr></span></dt><dd>Compatibility unknown</dd></dl></section></div><p></p>
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</div>
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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/NumberFormat" title="Intl.NumberFormat是对语言敏感的格式化数字类的构造器类"><code>Intl.NumberFormat</code></a></li>
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<li><a href="Reference/Global_Objects/Number/toLocaleString" title="toLocaleString() 方法返回这个数字在特定语言环境下的表示字符串。"><code>Number.prototype.toLocaleString()</code></a></li>
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</ul>
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</article> |