NavigatorLanguage.languages

这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

只读属性 NavigatorLanguage.languages 返回一个 DOMString 的数组，数组内容表示网站访客所使用的语言。使用 BCP 47 语言标签来描述不同的语言。在返回的数组中，最适合当前用户的语言将会被排到数组的首位。

navigator.language 的值是该属性返回数组的第一个元素 [3]。（但它基于系统语言设置。）

当该值发生改变，即最适合用户的语言被改变，事件languagechange 将会在 Window 对象下触发。

在每一个HTTP请求上的来自用户浏览器的HTTP协议头 Accept-Language 使用相同的来自 navigator.languages 属性的语言值，除了特殊的 qvalues （权重值）字段（如：en-US;q=0.8）。

语法

preferredLanguages = globalObj.navigator.languages

navigator.language   //"en-US"
navigator.languages  //["en-US", "zh-CN", "ja-JP"]

标准	状态	备注
HTML 5.1 NavigatorLanguage.languages	Recommendation	初始化定义

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`languages` Experimental	Chrome Full support 32 Notes Full support 32 Notes Notes In Chrome, `navigator.language` is the language of the browser UI, and is not guaranteed to be equal to `navigator.languages[0]`.	Edge Full support Yes	Firefox Full support 32 Notes Full support 32 Notes Notes In Firefox, the `navigator.languages` property's value is taken from the `intl.accept_languages` preference.	IE Full support 11 Notes Full support 11 Notes Notes Closest available (non-standard) properties are `userLanguage` and `browserLanguage`.	Opera Full support 24	Safari Full support 11	WebView Android Full support 4.4.3 Notes Full support 4.4.3 Notes Notes In Chrome, `navigator.language` is the language of the browser UI, and is not guaranteed to be equal to `navigator.languages[0]`.	Chrome Android Full support 32 Notes Full support 32 Notes Notes In Chrome, `navigator.language` is the language of the browser UI, and is not guaranteed to be equal to `navigator.languages[0]`.	Firefox Android Full support 4 Notes Full support 4 Notes Notes In Firefox, the `navigator.languages` property's value is taken from the `intl.accept_languages` preference.	Opera Android Full support 24	Safari iOS Full support Yes	Samsung Internet Android ?

Full support: Full support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
See implementation notes.: See implementation notes.