50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
/* @flow */
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declare var navigator: Object;
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/**
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* Custom language detection, just returns the config property if any.
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*/
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export default {
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/**
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* Does not support caching.
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*
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* @returns {void}
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*/
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cacheUserLanguage: Function.prototype,
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/**
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* Looks the language up in the config.
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*
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* @returns {string} The default language if any.
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*/
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lookup() {
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let found = [];
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if (typeof navigator !== 'undefined') {
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if (navigator.languages) {
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// chrome only; not an array, so can't use .push.apply instead of iterating
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for (let i = 0; i < navigator.languages.length; i++) {
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found.push(navigator.languages[i]);
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}
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}
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if (navigator.userLanguage) {
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found.push(navigator.userLanguage);
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}
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if (navigator.language) {
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found.push(navigator.language);
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}
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}
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// Fix language format (en-US => enUS)
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found = found.map<string>(f => f.replace(/[-_]+/g, ''));
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return found.length > 0 ? found : undefined;
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},
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/**
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* Name of the language detector.
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*/
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name: 'customNavigatorDetector'
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};
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