Slider switch functionality for jquery-i18n localization in a html partial view

_i18n_switch.html

<script src="./node_modules/jquery/dist/jquery.min.js"></script>
<input id="i18n-switch" type="checkbox" data-toggle="toggle" data-on="EN" data-off="TR">

<script type="text/javascript">
const getRoot = function () {
  return window.document.location.origin.toString()
}
const CONF = {
  prefix: '?locale=',
  lang: ['en', 'tr'],
  ext: '.json',
  tmp: '',
  path: '/js/i18n/',
  root: getRoot()
}
if (window.name === '') {
  window.name = CONF.lang[1]
}

if (window.location.search === CONF.prefix + CONF.lang[1]) {
  $(window).ready(function () {  // eslint-disable-line
    window.name = CONF.lang[1]
    $('#i18n-switch').prop('checked', true).change() // eslint-disable-line
  })
} else if (window.location.search === CONF.prefix + CONF.lang[0]) {
  $(window).ready(function () {  // eslint-disable-line
    window.name = CONF.lang[0]
    $('#i18n-switch').prop('checked', false).change() // eslint-disable-line
  })
}

var SetLocaleTo = function (locale) {
  if (locale) {
    $.i18n().locale = locale  // eslint-disable-line
  }
  $('body').i18n()  // eslint-disable-line
  $('head').i18n()  // eslint-disable-line
}

jQuery(function () {  // eslint-disable-line
  $.i18n().load({  // eslint-disable-line
    'en': CONF.root + CONF.tmp + CONF.path + CONF.lang[0] + CONF.ext,
    'tr': CONF.root + CONF.tmp + CONF.path + CONF.lang[1] + CONF.ext
  }).done(function () {
    SetLocaleTo(url(CONF.prefix.substring(0, 7)))  // eslint-disable-line
    History.Adapter.bind(window, 'statechange', function () {  // eslint-disable-line
      SetLocaleTo(url(CONF.prefix.substring(0, 7)))  // eslint-disable-line
    })
    if (window.name === CONF.lang[1]) {
      History.pushState(null, null, CONF.prefix + CONF.lang[1])  // eslint-disable-line
      $('#i18n-switch').prop('checked', true).change() // eslint-disable-line
    } else if (window.name === CONF.lang[0]) {
      History.pushState(null, null, CONF.prefix + CONF.lang[0])  // eslint-disable-line
      $('#i18n-switch').prop('checked', false).change() // eslint-disable-line
    }
    $('#i18n-switch').change(function () {  // eslint-disable-line
      if ($(this).is(':checked')) {  // eslint-disable-line
        History.pushState(null, null, CONF.prefix + CONF.lang[1])  // eslint-disable-line
        window.name = CONF.lang[1]
        $.getJSON(CONF.root + CONF.tmp + CONF.path + CONF.lang[1] + CONF.ext, function (data) {  // eslint-disable-line
          document.title = data.SiteName
        })
      } else {
        History.pushState(null, null, CONF.prefix + CONF.lang[0])  // eslint-disable-line
        window.name = CONF.lang[0]
        $.getJSON(CONF.root + CONF.tmp + CONF.path + CONF.lang[0] + CONF.ext, function (data) {  // eslint-disable-line
          document.title = data.SiteName
        })
      }
    })
  })
})
</script>