TypeError: Cannot read property '$locutus' of undefined

[jsonet]

How is it used in Vue?

Vue.prototype.$locutus = require('locutus');

....$locutus.php.array.ksort(...);

TypeError: Cannot read property '$locutus' of undefined

[jsonet]

var $global = typeof window !== 'undefined' ? window : global;
  $global.$locutus = $global.$locutus || {};
  var $locutus = $global.$locutus;
  $locutus.php = $locutus.php || {};
  $locutus.php.locales = $locutus.php.locales || {};

does this part of the source code need to be compatible with Vue?