bootstrap-vue/src/utils/locale.js

BootstrapVue, with more than 85 custom components, over 45 plugins, several custom directives, and over 300 icons, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated W

// Localization utilities
import { arrayIncludes } from './array'
import { toString } from './string'

// Languages that are RTL
const RTL_LANGS = [
  'ar',
  'az',
  'ckb',
  'fa',
  'he',
  'ks',
  'lrc',
  'mzn',
  'ps',
  'sd',
  'te',
  'ug',
  'ur',
  'yi'
].map(locale => locale.toLowerCase())

// Precompile RegExpr
const RX_STRIP_MODS = /-u-.+/

// Returns true if the locale is RTL
export const isLocaleRTL = locale => {
  // Determines if the locale is RTL (only single locale supported)
  const parts = toString(locale)
    .toLowerCase()
    .replace(RX_STRIP_MODS, '')
    .split('-')
  const locale1 = parts.slice(0, 2).join('-')
  const locale2 = parts[0]
  return arrayIncludes(RTL_LANGS, locale1) || arrayIncludes(RTL_LANGS, locale2)
}