vue-lang-mav/index.js

Vue.js i18n language integration

(function () {
  var vueLang = {};
  vueLang.install = function (Vue, options) {
    // register the replace filter (Credits: @Haixing-Hu, https://github.com/Haixing-Hu/vue-format/)
    var replace = require("./replace.js");
    Vue.filter("replace", replace);

    // Set parameters
    Vue.locales = options.locales || {};
    var lang = options.lang || "";

    if (!options.lang) {
      console.warn(
        "vue-lang: No default language given. Please specify as {lang: ..}"
      );
    }

    if (lang) {
      Vue.prototype.$lang = Vue.locales[lang];
    } else {
      Vue.prototype.$lang = {};
    }

    Vue.prototype.$langs = Object.keys(Vue.locales);

    Vue.prototype.$setLang = function (language) {
      if (language && Vue.prototype.$langs.indexOf(language) > -1) {
        Vue.prototype.$lang = Vue.locales[language];
        update(this.$root);
      } else {
        console.warn("vue-lang: Language not given or not initialized");
      }
    };
  };

  if (typeof exports == "object") {
    module.exports = vueLang;
  } else if (typeof define == "function" && define.amd) {
    define([], function () {
      return vueLang;
    });
  } else if (window.Vue) {
    window.vueLang = vueLang;
    Vue.use(vueLang);
  }

  /**
   * Credits: @Haixing-Hu
   *
   * Updates all the watchers in the Vue instance of a component tree.
   *
   * This function is inspired by the "_digest()" function in the
   * "src/instance/scope.js" of the source of Vue.js, excepts that this function
   * updates the children components no matter whether it is inheritable.
   *
   * @param vm
   *    the root of the component tree.
   */
  function update(vm) {
    if (
      vm &&
      vm._watchers &&
      Array.isArray(vm._watchers) &&
      vm._watchers.length > 0
    ) {
      var i = vm._watchers.length;
      while (i--) {
        vm._watchers[i].update(true);
      }
    }
    var children = vm.$children;
    i = children.length;
    while (i--) {
      var child = children[i];
      update(child);
    }
  }
})();