Value
A string representing the language version in BCP 47 language tag format. Examples of valid language tags include en, en-US, fr, fr-FR, es-ES, etc.
Note that in Safari on iOS prior to 10.2, the country code returned is lowercase: "en-us", "fr-fr" etc.
Examples
Using Intl constructors to do language-specific formatting
The Intl constructors allow formatting content to match the rules of a given locale. You can pass navigator.language to them to format content in the locale corresponding to the user's preferred language:
js
const date = new Date("2012-05-24");
const formattedDate = new Intl.DateTimeFormat(navigator.language).format(date);
Specifications
| Specification |
|---|
| HTML # dom-navigator-language-dev |