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---
title: NavigatorLanguage.language
slug: Web/API/NavigatorLanguage/language
tags:
- API
- Language
- NavigatorLanguage
- Property
- Read-only
- Reference
---
<div>{{APIRef("HTML DOM")}}</div>
<p> <strong><code>NavigatorLanguage.language</code></strong> 是一個唯讀的屬性，回傳使用者偏好的語言字串，通常是瀏覽器UI的文字</p>
<h2 id="Syntax">語法</h2>
<pre class="brush: js">const <em>lang</em> = navigator.language
</pre>
<h3 id="Value"> 值</h3>
<p>一個 {{domxref("DOMString")}}. <em><code>lang</code></em> 儲存一個代表此語言的字串。定義在<a class="external"
href="https://tools.ietf.org/rfc/bcp/bcp47.txt">BCP 47</a>。 範例: 合法的語言代碼 "en", "en-US", "fr", "fr-FR", "es-ES", etc.</p>
<p>在 iOS 小於 10.2 的 Safari 國碼是回傳小寫的喲！
"en-us", "fr-fr" etc.</p>
<h2 id="Example">範例</h2>
<pre class="brush: js">if (/^en\b/.test(navigator.language)) {
doLangSelect(window.navigator.language);
}
</pre>
<h2 id="Specifications">規範</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('HTML WHATWG', '#dom-navigator-language', 'NavigatorLanguage: language')}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td>Initial definition</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">瀏覽器相容性</h2>
<p>{{Compat("api.NavigatorLanguage.language")}}</p>
<h2 id="See_also">參見</h2>
<ul>
<li>{{domxref("NavigatorLanguage.languages", "navigator.languages")}}</li>
<li>{{domxref("navigator")}}</li>
</ul>
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