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19 lines
637 B
JavaScript
19 lines
637 B
JavaScript
const extension = require('extensionizer')
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const promisify = require('pify')
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const allLocales = require('../../_locales/index.json')
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const existingLocaleCodes = allLocales.map(locale => locale.code.toLowerCase().replace('_', '-'))
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async function getFirstPreferredLangCode () {
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const userPreferredLocaleCodes = await promisify(
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extension.i18n.getAcceptLanguages,
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{ errorFirst: false }
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)()
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const firstPreferredLangCode = userPreferredLocaleCodes
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.map(code => code.toLowerCase())
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.find(code => existingLocaleCodes.includes(code))
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return firstPreferredLangCode || 'en'
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}
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module.exports = getFirstPreferredLangCode
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