(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? (module.exports = factory()) : typeof define === 'function' && define.amd ? define(factory) : (global.VueI18n = factory());
})(this, function () {
  'use strict';
  var numberFormatKeys = ['compactDisplay', 'currency', 'currencyDisplay', 'currencySign', 'localeMatcher', 'notation', 'numberingSystem', 'signDisplay', 'style', 'unit', 'unitDisplay', 'useGrouping', 'minimumIntegerDigits', 'minimumFractionDigits', 'maximumFractionDigits', 'minimumSignificantDigits', 'maximumSignificantDigits'];
  function warn(msg, err) {
    if (typeof console !== 'undefined') {
      console.warn('[vue-i18n] ' + msg);
      if (err) {
        console.warn(err.stack);
      }
    }
  }
  function error(msg, err) {
    if (typeof console !== 'undefined') {
      console.error('[vue-i18n] ' + msg);
      if (err) {
        console.error(err.stack);
      }
    }
  }
  var isArray = Array.isArray;
  function isObject(obj) {
    return obj !== null && typeof obj === 'object';
  }
  function isBoolean(val) {
    return typeof val === 'boolean';
  }
  function isString(val) {
    return typeof val === 'string';
  }
  var toString = Object.prototype.toString;
  var OBJECT_STRING = '[object Object]';
  function isPlainObject(obj) {
    return toString.call(obj) === OBJECT_STRING;
  }
  function isNull(val) {
    return val === null || val === undefined;
  }
  function isFunction(val) {
    return typeof val === 'function';
  }
  function parseArgs() {
    var args = [],
      len = arguments.length;
    while (len--) args[len] = arguments[len];
    var locale = null;
    var params = null;
    if (args.length === 1) {
      if (isObject(args[0]) || isArray(args[0])) {
        params = args[0];
      } else if (typeof args[0] === 'string') {
        locale = args[0];
      }
    } else if (args.length === 2) {
      if (typeof args[0] === 'string') {
        locale = args[0];
      }
      if (isObject(args[1]) || isArray(args[1])) {
        params = args[1];
      }
    }
    return { locale: locale, params: params };
  }
  function looseClone(obj) {
    return JSON.parse(JSON.stringify(obj));
  }
  function remove(arr, item) {
    if (arr.delete(item)) {
      return arr;
    }
  }
  function arrayFrom(arr) {
    var ret = [];
    arr.forEach(function (a) {
      return ret.push(a);
    });
    return ret;
  }
  function includes(arr, item) {
    return !!~arr.indexOf(item);
  }
  var hasOwnProperty = Object.prototype.hasOwnProperty;
  function hasOwn(obj, key) {
    return hasOwnProperty.call(obj, key);
  }
  function merge(target) {
    var arguments$1 = arguments;
    var output = Object(target);
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments$1[i];
      if (source !== undefined && source !== null) {
        var key = void 0;
        for (key in source) {
          if (hasOwn(source, key)) {
            if (isObject(source[key])) {
              output[key] = merge(output[key], source[key]);
            } else {
              output[key] = source[key];
            }
          }
        }
      }
    }
    return output;
  }
  function looseEqual(a, b) {
    if (a === b) {
      return true;
    }
    var isObjectA = isObject(a);
    var isObjectB = isObject(b);
    if (isObjectA && isObjectB) {
      try {
        var isArrayA = isArray(a);
        var isArrayB = isArray(b);
        if (isArrayA && isArrayB) {
          return (
            a.length === b.length &&
            a.every(function (e, i) {
              return looseEqual(e, b[i]);
            })
          );
        } else if (!isArrayA && !isArrayB) {
          var keysA = Object.keys(a);
          var keysB = Object.keys(b);
          return (
            keysA.length === keysB.length &&
            keysA.every(function (key) {
              return looseEqual(a[key], b[key]);
            })
          );
        } else {
          return false;
        }
      } catch (e) {
        return false;
      }
    } else if (!isObjectA && !isObjectB) {
      return String(a) === String(b);
    } else {
      return false;
    }
  }
  function escapeHtml(rawText) {
    return rawText.replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, '&apos;');
  }
  function escapeParams(params) {
    if (params != null) {
      Object.keys(params).forEach(function (key) {
        if (typeof params[key] == 'string') {
          params[key] = escapeHtml(params[key]);
        }
      });
    }
    return params;
  }
  function extend(Vue) {
    if (!Vue.prototype.hasOwnProperty('$i18n')) {
      Object.defineProperty(Vue.prototype, '$i18n', {
        get: function get() {
          return this._i18n;
        }
      });
    }
    Vue.prototype.$t = function (key) {
      var values = [],
        len = arguments.length - 1;
      while (len-- > 0) values[len] = arguments[len + 1];
      var i18n = this.$i18n;
      return i18n._t.apply(i18n, [key, i18n.locale, i18n._getMessages(), this].concat(values));
    };
    Vue.prototype.$tc = function (key, choice) {
      var values = [],
        len = arguments.length - 2;
      while (len-- > 0) values[len] = arguments[len + 2];
      var i18n = this.$i18n;
      return i18n._tc.apply(i18n, [key, i18n.locale, i18n._getMessages(), this, choice].concat(values));
    };
    Vue.prototype.$te = function (key, locale) {
      var i18n = this.$i18n;
      return i18n._te(key, i18n.locale, i18n._getMessages(), locale);
    };
    Vue.prototype.$d = function (value) {
      var ref;
      var args = [],
        len = arguments.length - 1;
      while (len-- > 0) args[len] = arguments[len + 1];
      return (ref = this.$i18n).d.apply(ref, [value].concat(args));
    };
    Vue.prototype.$n = function (value) {
      var ref;
      var args = [],
        len = arguments.length - 1;
      while (len-- > 0) args[len] = arguments[len + 1];
      return (ref = this.$i18n).n.apply(ref, [value].concat(args));
    };
  }
  var mixin = {
    beforeCreate: function beforeCreate() {
      var options = this.$options;
      options.i18n = options.i18n || (options.__i18n ? {} : null);
      if (options.i18n) {
        if (options.i18n instanceof VueI18n) {
          if (options.__i18n) {
            try {
              var localeMessages = options.i18n && options.i18n.messages ? options.i18n.messages : {};
              options.__i18n.forEach(function (resource) {
                localeMessages = merge(localeMessages, JSON.parse(resource));
              });
              Object.keys(localeMessages).forEach(function (locale) {
                options.i18n.mergeLocaleMessage(locale, localeMessages[locale]);
              });
            } catch (e) {
              {
                error('Cannot parse locale messages via custom blocks.', e);
              }
            }
          }
          this._i18n = options.i18n;
          this._i18nWatcher = this._i18n.watchI18nData();
        } else if (isPlainObject(options.i18n)) {
          var rootI18n = this.$root && this.$root.$i18n && this.$root.$i18n instanceof VueI18n ? this.$root.$i18n : null;
          if (rootI18n) {
            options.i18n.root = this.$root;
            options.i18n.formatter = rootI18n.formatter;
            options.i18n.fallbackLocale = rootI18n.fallbackLocale;
            options.i18n.formatFallbackMessages = rootI18n.formatFallbackMessages;
            options.i18n.silentTranslationWarn = rootI18n.silentTranslationWarn;
            options.i18n.silentFallbackWarn = rootI18n.silentFallbackWarn;
            options.i18n.pluralizationRules = rootI18n.pluralizationRules;
            options.i18n.preserveDirectiveContent = rootI18n.preserveDirectiveContent;
          }
          if (options.__i18n) {
            try {
              var localeMessages$1 = options.i18n && options.i18n.messages ? options.i18n.messages : {};
              options.__i18n.forEach(function (resource) {
                localeMessages$1 = merge(localeMessages$1, JSON.parse(resource));
              });
              options.i18n.messages = localeMessages$1;
            } catch (e) {
              {
                warn('Cannot parse locale messages via custom blocks.', e);
              }
            }
          }
          var ref = options.i18n;
          var sharedMessages = ref.sharedMessages;
          if (sharedMessages && isPlainObject(sharedMessages)) {
            options.i18n.messages = merge(options.i18n.messages, sharedMessages);
          }
          this._i18n = new VueI18n(options.i18n);
          this._i18nWatcher = this._i18n.watchI18nData();
          if (options.i18n.sync === undefined || !!options.i18n.sync) {
            this._localeWatcher = this.$i18n.watchLocale();
          }
          if (rootI18n) {
            rootI18n.onComponentInstanceCreated(this._i18n);
          }
        } else {
          {
            warn("Cannot be interpreted 'i18n' option.");
          }
        }
      } else if (this.$root && this.$root.$i18n && this.$root.$i18n instanceof VueI18n) {
        this._i18n = this.$root.$i18n;
      } else if (options.parent && options.parent.$i18n && options.parent.$i18n instanceof VueI18n) {
        this._i18n = options.parent.$i18n;
      }
    },
    beforeMount: function beforeMount() {
      var options = this.$options;
      options.i18n = options.i18n || (options.__i18n ? {} : null);
      if (options.i18n) {
        if (options.i18n instanceof VueI18n) {
          this._i18n.subscribeDataChanging(this);
          this._subscribing = true;
        } else if (isPlainObject(options.i18n)) {
          this._i18n.subscribeDataChanging(this);
          this._subscribing = true;
        } else {
          {
            warn("Cannot be interpreted 'i18n' option.");
          }
        }
      } else if (this.$root && this.$root.$i18n && this.$root.$i18n instanceof VueI18n) {
        this._i18n.subscribeDataChanging(this);
        this._subscribing = true;
      } else if (options.parent && options.parent.$i18n && options.parent.$i18n instanceof VueI18n) {
        this._i18n.subscribeDataChanging(this);
        this._subscribing = true;
      }
    },
    mounted: function mounted() {
      if (this !== this.$root && this.$options.__INTLIFY_META__ && this.$el) {
        this.$el.setAttribute('data-intlify', this.$options.__INTLIFY_META__);
      }
    },
    beforeDestroy: function beforeDestroy() {
      if (!this._i18n) {
        return;
      }
      var self = this;
      this.$nextTick(function () {
        if (self._subscribing) {
          self._i18n.unsubscribeDataChanging(self);
          delete self._subscribing;
        }
        if (self._i18nWatcher) {
          self._i18nWatcher();
          self._i18n.destroyVM();
          delete self._i18nWatcher;
        }
        if (self._localeWatcher) {
          self._localeWatcher();
          delete self._localeWatcher;
        }
      });
    }
  };
  var interpolationComponent = {
    name: 'i18n',
    functional: true,
    props: { tag: { type: [String, Boolean, Object], default: 'span' }, path: { type: String, required: true }, locale: { type: String }, places: { type: [Array, Object] } },
    render: function render(h, ref) {
      var data = ref.data;
      var parent = ref.parent;
      var props = ref.props;
      var slots = ref.slots;
      var $i18n = parent.$i18n;
      if (!$i18n) {
        {
          warn('Cannot find VueI18n instance!');
        }
        return;
      }
      var path = props.path;
      var locale = props.locale;
      var places = props.places;
      var params = slots();
      var children = $i18n.i(path, locale, onlyHasDefaultPlace(params) || places ? useLegacyPlaces(params.default, places) : params);
      var tag = (!!props.tag && props.tag !== true) || props.tag === false ? props.tag : 'span';
      return tag ? h(tag, data, children) : children;
    }
  };
  function onlyHasDefaultPlace(params) {
    var prop;
    for (prop in params) {
      if (prop !== 'default') {
        return false;
      }
    }
    return Boolean(prop);
  }
  function useLegacyPlaces(children, places) {
    var params = places ? createParamsFromPlaces(places) : {};
    if (!children) {
      return params;
    }
    children = children.filter(function (child) {
      return child.tag || child.text.trim() !== '';
    });
    var everyPlace = children.every(vnodeHasPlaceAttribute);
    if (everyPlace) {
      warn('`place` attribute is deprecated in next major version. Please switch to Vue slots.');
    }
    return children.reduce(everyPlace ? assignChildPlace : assignChildIndex, params);
  }
  function createParamsFromPlaces(places) {
    {
      warn('`places` prop is deprecated in next major version. Please switch to Vue slots.');
    }
    return Array.isArray(places) ? places.reduce(assignChildIndex, {}) : Object.assign({}, places);
  }
  function assignChildPlace(params, child) {
    if (child.data && child.data.attrs && child.data.attrs.place) {
      params[child.data.attrs.place] = child;
    }
    return params;
  }
  function assignChildIndex(params, child, index) {
    params[index] = child;
    return params;
  }
  function vnodeHasPlaceAttribute(vnode) {
    return Boolean(vnode.data && vnode.data.attrs && vnode.data.attrs.place);
  }
  var numberComponent = {
    name: 'i18n-n',
    functional: true,
    props: { tag: { type: [String, Boolean, Object], default: 'span' }, value: { type: Number, required: true }, format: { type: [String, Object] }, locale: { type: String } },
    render: function render(h, ref) {
      var props = ref.props;
      var parent = ref.parent;
      var data = ref.data;
      var i18n = parent.$i18n;
      if (!i18n) {
        {
          warn('Cannot find VueI18n instance!');
        }
        return null;
      }
      var key = null;
      var options = null;
      if (isString(props.format)) {
        key = props.format;
      } else if (isObject(props.format)) {
        if (props.format.key) {
          key = props.format.key;
        }
        options = Object.keys(props.format).reduce(function (acc, prop) {
          var obj;
          if (includes(numberFormatKeys, prop)) {
            return Object.assign({}, acc, ((obj = {}), (obj[prop] = props.format[prop]), obj));
          }
          return acc;
        }, null);
      }
      var locale = props.locale || i18n.locale;
      var parts = i18n._ntp(props.value, locale, key, options);
      var values = parts.map(function (part, index) {
        var obj;
        var slot = data.scopedSlots && data.scopedSlots[part.type];
        return slot ? slot(((obj = {}), (obj[part.type] = part.value), (obj.index = index), (obj.parts = parts), obj)) : part.value;
      });
      var tag = (!!props.tag && props.tag !== true) || props.tag === false ? props.tag : 'span';
      return tag ? h(tag, { attrs: data.attrs, class: data['class'], staticClass: data.staticClass }, values) : values;
    }
  };
  function bind(el, binding, vnode) {
    if (!assert(el, vnode)) {
      return;
    }
    t(el, binding, vnode);
  }
  function update(el, binding, vnode, oldVNode) {
    if (!assert(el, vnode)) {
      return;
    }
    var i18n = vnode.context.$i18n;
    if (localeEqual(el, vnode) && looseEqual(binding.value, binding.oldValue) && looseEqual(el._localeMessage, i18n.getLocaleMessage(i18n.locale))) {
      return;
    }
    t(el, binding, vnode);
  }
  function unbind(el, binding, vnode, oldVNode) {
    var vm = vnode.context;
    if (!vm) {
      warn('Vue instance does not exists in VNode context');
      return;
    }
    var i18n = vnode.context.$i18n || {};
    if (!binding.modifiers.preserve && !i18n.preserveDirectiveContent) {
      el.textContent = '';
    }
    el._vt = undefined;
    delete el['_vt'];
    el._locale = undefined;
    delete el['_locale'];
    el._localeMessage = undefined;
    delete el['_localeMessage'];
  }
  function assert(el, vnode) {
    var vm = vnode.context;
    if (!vm) {
      warn('Vue instance does not exists in VNode context');
      return false;
    }
    if (!vm.$i18n) {
      warn('VueI18n instance does not exists in Vue instance');
      return false;
    }
    return true;
  }
  function localeEqual(el, vnode) {
    var vm = vnode.context;
    return el._locale === vm.$i18n.locale;
  }
  function t(el, binding, vnode) {
    var ref$1, ref$2;
    var value = binding.value;
    var ref = parseValue(value);
    var path = ref.path;
    var locale = ref.locale;
    var args = ref.args;
    var choice = ref.choice;
    if (!path && !locale && !args) {
      warn('value type not supported');
      return;
    }
    if (!path) {
      warn('`path` is required in v-t directive');
      return;
    }
    var vm = vnode.context;
    if (choice != null) {
      el._vt = el.textContent = (ref$1 = vm.$i18n).tc.apply(ref$1, [path, choice].concat(makeParams(locale, args)));
    } else {
      el._vt = el.textContent = (ref$2 = vm.$i18n).t.apply(ref$2, [path].concat(makeParams(locale, args)));
    }
    el._locale = vm.$i18n.locale;
    el._localeMessage = vm.$i18n.getLocaleMessage(vm.$i18n.locale);
  }
  function parseValue(value) {
    var path;
    var locale;
    var args;
    var choice;
    if (isString(value)) {
      path = value;
    } else if (isPlainObject(value)) {
      path = value.path;
      locale = value.locale;
      args = value.args;
      choice = value.choice;
    }
    return { path: path, locale: locale, args: args, choice: choice };
  }
  function makeParams(locale, args) {
    var params = [];
    locale && params.push(locale);
    if (args && (Array.isArray(args) || isPlainObject(args))) {
      params.push(args);
    }
    return params;
  }
  var Vue;
  function install(_Vue) {
    if (install.installed && _Vue === Vue) {
      warn('already installed.');
      return;
    }
    install.installed = true;
    Vue = _Vue;
    var version = (Vue.version && Number(Vue.version.split('.')[0])) || -1;
    if (version < 2) {
      warn('vue-i18n (' + install.version + ') need to use Vue 2.0 or later (Vue: ' + Vue.version + ').');
      return;
    }
    extend(Vue);
    Vue.mixin(mixin);
    Vue.directive('t', { bind: bind, update: update, unbind: unbind });
    Vue.component(interpolationComponent.name, interpolationComponent);
    Vue.component(numberComponent.name, numberComponent);
    var strats = Vue.config.optionMergeStrategies;
    strats.i18n = function (parentVal, childVal) {
      return childVal === undefined ? parentVal : childVal;
    };
  }
  var BaseFormatter = function BaseFormatter() {
    this._caches = Object.create(null);
  };
  BaseFormatter.prototype.interpolate = function interpolate(message, values) {
    if (!values) {
      return [message];
    }
    var tokens = this._caches[message];
    if (!tokens) {
      tokens = parse(message);
      this._caches[message] = tokens;
    }
    return compile(tokens, values);
  };
  var RE_TOKEN_LIST_VALUE = /^(?:\d)+/;
  var RE_TOKEN_NAMED_VALUE = /^(?:\w)+/;
  function parse(format) {
    var tokens = [];
    var position = 0;
    var text = '';
    while (position < format.length) {
      var char = format[position++];
      if (char === '{') {
        if (text) {
          tokens.push({ type: 'text', value: text });
        }
        text = '';
        var sub = '';
        char = format[position++];
        while (char !== undefined && char !== '}') {
          sub += char;
          char = format[position++];
        }
        var isClosed = char === '}';
        var type = RE_TOKEN_LIST_VALUE.test(sub) ? 'list' : isClosed && RE_TOKEN_NAMED_VALUE.test(sub) ? 'named' : 'unknown';
        tokens.push({ value: sub, type: type });
      } else if (char === '%') {
        if (format[position] !== '{') {
          text += char;
        }
      } else {
        text += char;
      }
    }
    text && tokens.push({ type: 'text', value: text });
    return tokens;
  }
  function compile(tokens, values) {
    var compiled = [];
    var index = 0;
    var mode = Array.isArray(values) ? 'list' : isObject(values) ? 'named' : 'unknown';
    if (mode === 'unknown') {
      return compiled;
    }
    while (index < tokens.length) {
      var token = tokens[index];
      switch (token.type) {
        case 'text':
          compiled.push(token.value);
          break;
        case 'list':
          compiled.push(values[parseInt(token.value, 10)]);
          break;
        case 'named':
          if (mode === 'named') {
            compiled.push(values[token.value]);
          } else {
            {
              warn("Type of token '" + token.type + "' and format of value '" + mode + "' don't match!");
            }
          }
          break;
        case 'unknown':
          {
            warn("Detect 'unknown' type of token!");
          }
          break;
      }
      index++;
    }
    return compiled;
  }
  var APPEND = 0;
  var PUSH = 1;
  var INC_SUB_PATH_DEPTH = 2;
  var PUSH_SUB_PATH = 3;
  var BEFORE_PATH = 0;
  var IN_PATH = 1;
  var BEFORE_IDENT = 2;
  var IN_IDENT = 3;
  var IN_SUB_PATH = 4;
  var IN_SINGLE_QUOTE = 5;
  var IN_DOUBLE_QUOTE = 6;
  var AFTER_PATH = 7;
  var ERROR = 8;
  var pathStateMachine = [];
  pathStateMachine[BEFORE_PATH] = { ws: [BEFORE_PATH], ident: [IN_IDENT, APPEND], '[': [IN_SUB_PATH], eof: [AFTER_PATH] };
  pathStateMachine[IN_PATH] = { ws: [IN_PATH], '.': [BEFORE_IDENT], '[': [IN_SUB_PATH], eof: [AFTER_PATH] };
  pathStateMachine[BEFORE_IDENT] = { ws: [BEFORE_IDENT], ident: [IN_IDENT, APPEND], 0: [IN_IDENT, APPEND], number: [IN_IDENT, APPEND] };
  pathStateMachine[IN_IDENT] = { ident: [IN_IDENT, APPEND], 0: [IN_IDENT, APPEND], number: [IN_IDENT, APPEND], ws: [IN_PATH, PUSH], '.': [BEFORE_IDENT, PUSH], '[': [IN_SUB_PATH, PUSH], eof: [AFTER_PATH, PUSH] };
  pathStateMachine[IN_SUB_PATH] = { "'": [IN_SINGLE_QUOTE, APPEND], '"': [IN_DOUBLE_QUOTE, APPEND], '[': [IN_SUB_PATH, INC_SUB_PATH_DEPTH], ']': [IN_PATH, PUSH_SUB_PATH], eof: ERROR, else: [IN_SUB_PATH, APPEND] };
  pathStateMachine[IN_SINGLE_QUOTE] = { "'": [IN_SUB_PATH, APPEND], eof: ERROR, else: [IN_SINGLE_QUOTE, APPEND] };
  pathStateMachine[IN_DOUBLE_QUOTE] = { '"': [IN_SUB_PATH, APPEND], eof: ERROR, else: [IN_DOUBLE_QUOTE, APPEND] };
  var literalValueRE = /^\s?(?:true|false|-?[\d.]+|'[^']*'|"[^"]*")\s?$/;
  function isLiteral(exp) {
    return literalValueRE.test(exp);
  }
  function stripQuotes(str) {
    var a = str.charCodeAt(0);
    var b = str.charCodeAt(str.length - 1);
    return a === b && (a === 34 || a === 39) ? str.slice(1, -1) : str;
  }
  function getPathCharType(ch) {
    if (ch === undefined || ch === null) {
      return 'eof';
    }
    var code = ch.charCodeAt(0);
    switch (code) {
      case 91:
      case 93:
      case 46:
      case 34:
      case 39:
        return ch;
      case 95:
      case 36:
      case 45:
        return 'ident';
      case 9:
      case 10:
      case 13:
      case 160:
      case 65279:
      case 8232:
      case 8233:
        return 'ws';
    }
    return 'ident';
  }
  function formatSubPath(path) {
    var trimmed = path.trim();
    if (path.charAt(0) === '0' && isNaN(path)) {
      return false;
    }
    return isLiteral(trimmed) ? stripQuotes(trimmed) : '*' + trimmed;
  }
  function parse$1(path) {
    var keys = [];
    var index = -1;
    var mode = BEFORE_PATH;
    var subPathDepth = 0;
    var c;
    var key;
    var newChar;
    var type;
    var transition;
    var action;
    var typeMap;
    var actions = [];
    actions[PUSH] = function () {
      if (key !== undefined) {
        keys.push(key);
        key = undefined;
      }
    };
    actions[APPEND] = function () {
      if (key === undefined) {
        key = newChar;
      } else {
        key += newChar;
      }
    };
    actions[INC_SUB_PATH_DEPTH] = function () {
      actions[APPEND]();
      subPathDepth++;
    };
    actions[PUSH_SUB_PATH] = function () {
      if (subPathDepth > 0) {
        subPathDepth--;
        mode = IN_SUB_PATH;
        actions[APPEND]();
      } else {
        subPathDepth = 0;
        if (key === undefined) {
          return false;
        }
        key = formatSubPath(key);
        if (key === false) {
          return false;
        } else {
          actions[PUSH]();
        }
      }
    };
    function maybeUnescapeQuote() {
      var nextChar = path[index + 1];
      if ((mode === IN_SINGLE_QUOTE && nextChar === "'") || (mode === IN_DOUBLE_QUOTE && nextChar === '"')) {
        index++;
        newChar = '\\' + nextChar;
        actions[APPEND]();
        return true;
      }
    }
    while (mode !== null) {
      index++;
      c = path[index];
      if (c === '\\' && maybeUnescapeQuote()) {
        continue;
      }
      type = getPathCharType(c);
      typeMap = pathStateMachine[mode];
      transition = typeMap[type] || typeMap['else'] || ERROR;
      if (transition === ERROR) {
        return;
      }
      mode = transition[0];
      action = actions[transition[1]];
      if (action) {
        newChar = transition[2];
        newChar = newChar === undefined ? c : newChar;
        if (action() === false) {
          return;
        }
      }
      if (mode === AFTER_PATH) {
        return keys;
      }
    }
  }
  var I18nPath = function I18nPath() {
    this._cache = Object.create(null);
  };
  I18nPath.prototype.parsePath = function parsePath(path) {
    var hit = this._cache[path];
    if (!hit) {
      hit = parse$1(path);
      if (hit) {
        this._cache[path] = hit;
      }
    }
    return hit || [];
  };
  I18nPath.prototype.getPathValue = function getPathValue(obj, path) {
    if (!isObject(obj)) {
      return null;
    }
    var paths = this.parsePath(path);
    if (paths.length === 0) {
      return null;
    } else {
      var length = paths.length;
      var last = obj;
      var i = 0;
      while (i < length) {
        var value = last[paths[i]];
        if (value === undefined || value === null) {
          return null;
        }
        last = value;
        i++;
      }
      return last;
    }
  };
  var htmlTagMatcher = /<\/?[\w\s="/.':;#-\/]+>/;
  var linkKeyMatcher = /(?:@(?:\.[a-z]+)?:(?:[\w\-_|.]+|\([\w\-_|.]+\)))/g;
  var linkKeyPrefixMatcher = /^@(?:\.([a-z]+))?:/;
  var bracketsMatcher = /[()]/g;
  var defaultModifiers = {
    upper: function (str) {
      return str.toLocaleUpperCase();
    },
    lower: function (str) {
      return str.toLocaleLowerCase();
    },
    capitalize: function (str) {
      return '' + str.charAt(0).toLocaleUpperCase() + str.substr(1);
    }
  };
  var defaultFormatter = new BaseFormatter();
  var VueI18n = function VueI18n(options) {
    var this$1 = this;
    if (options === void 0) options = {};
    if (!Vue && typeof window !== 'undefined' && window.Vue) {
      install(window.Vue);
    }
    var locale = options.locale || 'en-US';
    var fallbackLocale = options.fallbackLocale === false ? false : options.fallbackLocale || 'en-US';
    var messages = options.messages || {};
    var dateTimeFormats = options.dateTimeFormats || {};
    var numberFormats = options.numberFormats || {};
    this._vm = null;
    this._formatter = options.formatter || defaultFormatter;
    this._modifiers = options.modifiers || {};
    this._missing = options.missing || null;
    this._root = options.root || null;
    this._sync = options.sync === undefined ? true : !!options.sync;
    this._fallbackRoot = options.fallbackRoot === undefined ? true : !!options.fallbackRoot;
    this._formatFallbackMessages = options.formatFallbackMessages === undefined ? false : !!options.formatFallbackMessages;
    this._silentTranslationWarn = options.silentTranslationWarn === undefined ? false : options.silentTranslationWarn;
    this._silentFallbackWarn = options.silentFallbackWarn === undefined ? false : !!options.silentFallbackWarn;
    this._dateTimeFormatters = {};
    this._numberFormatters = {};
    this._path = new I18nPath();
    this._dataListeners = new Set();
    this._componentInstanceCreatedListener = options.componentInstanceCreatedListener || null;
    this._preserveDirectiveContent = options.preserveDirectiveContent === undefined ? false : !!options.preserveDirectiveContent;
    this.pluralizationRules = options.pluralizationRules || {};
    this._warnHtmlInMessage = options.warnHtmlInMessage || 'off';
    this._postTranslation = options.postTranslation || null;
    this._escapeParameterHtml = options.escapeParameterHtml || false;
    this.getChoiceIndex = function (choice, choicesLength) {
      var thisPrototype = Object.getPrototypeOf(this$1);
      if (thisPrototype && thisPrototype.getChoiceIndex) {
        var prototypeGetChoiceIndex = thisPrototype.getChoiceIndex;
        return prototypeGetChoiceIndex.call(this$1, choice, choicesLength);
      }
      var defaultImpl = function (_choice, _choicesLength) {
        _choice = Math.abs(_choice);
        if (_choicesLength === 2) {
          return _choice ? (_choice > 1 ? 1 : 0) : 1;
        }
        return _choice ? Math.min(_choice, 2) : 0;
      };
      if (this$1.locale in this$1.pluralizationRules) {
        return this$1.pluralizationRules[this$1.locale].apply(this$1, [choice, choicesLength]);
      } else {
        return defaultImpl(choice, choicesLength);
      }
    };
    this._exist = function (message, key) {
      if (!message || !key) {
        return false;
      }
      if (!isNull(this$1._path.getPathValue(message, key))) {
        return true;
      }
      if (message[key]) {
        return true;
      }
      return false;
    };
    if (this._warnHtmlInMessage === 'warn' || this._warnHtmlInMessage === 'error') {
      Object.keys(messages).forEach(function (locale) {
        this$1._checkLocaleMessage(locale, this$1._warnHtmlInMessage, messages[locale]);
      });
    }
    this._initVM({ locale: locale, fallbackLocale: fallbackLocale, messages: messages, dateTimeFormats: dateTimeFormats, numberFormats: numberFormats });
  };
  var prototypeAccessors = {
    vm: { configurable: true },
    messages: { configurable: true },
    dateTimeFormats: { configurable: true },
    numberFormats: { configurable: true },
    availableLocales: { configurable: true },
    locale: { configurable: true },
    fallbackLocale: { configurable: true },
    formatFallbackMessages: { configurable: true },
    missing: { configurable: true },
    formatter: { configurable: true },
    silentTranslationWarn: { configurable: true },
    silentFallbackWarn: { configurable: true },
    preserveDirectiveContent: { configurable: true },
    warnHtmlInMessage: { configurable: true },
    postTranslation: { configurable: true }
  };
  VueI18n.prototype._checkLocaleMessage = function _checkLocaleMessage(locale, level, message) {
    var paths = [];
    var fn = function (level, locale, message, paths) {
      if (isPlainObject(message)) {
        Object.keys(message).forEach(function (key) {
          var val = message[key];
          if (isPlainObject(val)) {
            paths.push(key);
            paths.push('.');
            fn(level, locale, val, paths);
            paths.pop();
            paths.pop();
          } else {
            paths.push(key);
            fn(level, locale, val, paths);
            paths.pop();
          }
        });
      } else if (isArray(message)) {
        message.forEach(function (item, index) {
          if (isPlainObject(item)) {
            paths.push('[' + index + ']');
            paths.push('.');
            fn(level, locale, item, paths);
            paths.pop();
            paths.pop();
          } else {
            paths.push('[' + index + ']');
            fn(level, locale, item, paths);
            paths.pop();
          }
        });
      } else if (isString(message)) {
        var ret = htmlTagMatcher.test(message);
        if (ret) {
          var msg = "Detected HTML in message '" + message + "' of keypath '" + paths.join('') + "' at '" + locale + "'. Consider component interpolation with '<i18n>' to avoid XSS. See https://bit.ly/2ZqJzkp";
          if (level === 'warn') {
            warn(msg);
          } else if (level === 'error') {
            error(msg);
          }
        }
      }
    };
    fn(level, locale, message, paths);
  };
  VueI18n.prototype._initVM = function _initVM(data) {
    var silent = Vue.config.silent;
    Vue.config.silent = true;
    this._vm = new Vue({ data: data });
    Vue.config.silent = silent;
  };
  VueI18n.prototype.destroyVM = function destroyVM() {
    this._vm.$destroy();
  };
  VueI18n.prototype.subscribeDataChanging = function subscribeDataChanging(vm) {
    this._dataListeners.add(vm);
  };
  VueI18n.prototype.unsubscribeDataChanging = function unsubscribeDataChanging(vm) {
    remove(this._dataListeners, vm);
  };
  VueI18n.prototype.watchI18nData = function watchI18nData() {
    var this$1 = this;
    return this._vm.$watch(
      '$data',
      function () {
        var listeners = arrayFrom(this$1._dataListeners);
        var i = listeners.length;
        while (i--) {
          Vue.nextTick(function () {
            listeners[i] && listeners[i].$forceUpdate();
          });
        }
      },
      { deep: true }
    );
  };
  VueI18n.prototype.watchLocale = function watchLocale() {
    if (!this._sync || !this._root) {
      return null;
    }
    var target = this._vm;
    return this._root.$i18n.vm.$watch(
      'locale',
      function (val) {
        target.$set(target, 'locale', val);
        target.$forceUpdate();
      },
      { immediate: true }
    );
  };
  VueI18n.prototype.onComponentInstanceCreated = function onComponentInstanceCreated(newI18n) {
    if (this._componentInstanceCreatedListener) {
      this._componentInstanceCreatedListener(newI18n, this);
    }
  };
  prototypeAccessors.vm.get = function () {
    return this._vm;
  };
  prototypeAccessors.messages.get = function () {
    return looseClone(this._getMessages());
  };
  prototypeAccessors.dateTimeFormats.get = function () {
    return looseClone(this._getDateTimeFormats());
  };
  prototypeAccessors.numberFormats.get = function () {
    return looseClone(this._getNumberFormats());
  };
  prototypeAccessors.availableLocales.get = function () {
    return Object.keys(this.messages).sort();
  };
  prototypeAccessors.locale.get = function () {
    return this._vm.locale;
  };
  prototypeAccessors.locale.set = function (locale) {
    this._vm.$set(this._vm, 'locale', locale);
  };
  prototypeAccessors.fallbackLocale.get = function () {
    return this._vm.fallbackLocale;
  };
  prototypeAccessors.fallbackLocale.set = function (locale) {
    this._localeChainCache = {};
    this._vm.$set(this._vm, 'fallbackLocale', locale);
  };
  prototypeAccessors.formatFallbackMessages.get = function () {
    return this._formatFallbackMessages;
  };
  prototypeAccessors.formatFallbackMessages.set = function (fallback) {
    this._formatFallbackMessages = fallback;
  };
  prototypeAccessors.missing.get = function () {
    return this._missing;
  };
  prototypeAccessors.missing.set = function (handler) {
    this._missing = handler;
  };
  prototypeAccessors.formatter.get = function () {
    return this._formatter;
  };
  prototypeAccessors.formatter.set = function (formatter) {
    this._formatter = formatter;
  };
  prototypeAccessors.silentTranslationWarn.get = function () {
    return this._silentTranslationWarn;
  };
  prototypeAccessors.silentTranslationWarn.set = function (silent) {
    this._silentTranslationWarn = silent;
  };
  prototypeAccessors.silentFallbackWarn.get = function () {
    return this._silentFallbackWarn;
  };
  prototypeAccessors.silentFallbackWarn.set = function (silent) {
    this._silentFallbackWarn = silent;
  };
  prototypeAccessors.preserveDirectiveContent.get = function () {
    return this._preserveDirectiveContent;
  };
  prototypeAccessors.preserveDirectiveContent.set = function (preserve) {
    this._preserveDirectiveContent = preserve;
  };
  prototypeAccessors.warnHtmlInMessage.get = function () {
    return this._warnHtmlInMessage;
  };
  prototypeAccessors.warnHtmlInMessage.set = function (level) {
    var this$1 = this;
    var orgLevel = this._warnHtmlInMessage;
    this._warnHtmlInMessage = level;
    if (orgLevel !== level && (level === 'warn' || level === 'error')) {
      var messages = this._getMessages();
      Object.keys(messages).forEach(function (locale) {
        this$1._checkLocaleMessage(locale, this$1._warnHtmlInMessage, messages[locale]);
      });
    }
  };
  prototypeAccessors.postTranslation.get = function () {
    return this._postTranslation;
  };
  prototypeAccessors.postTranslation.set = function (handler) {
    this._postTranslation = handler;
  };
  VueI18n.prototype._getMessages = function _getMessages() {
    return this._vm.messages;
  };
  VueI18n.prototype._getDateTimeFormats = function _getDateTimeFormats() {
    return this._vm.dateTimeFormats;
  };
  VueI18n.prototype._getNumberFormats = function _getNumberFormats() {
    return this._vm.numberFormats;
  };
  VueI18n.prototype._warnDefault = function _warnDefault(locale, key, result, vm, values, interpolateMode) {
    if (!isNull(result)) {
      return result;
    }
    if (this._missing) {
      var missingRet = this._missing.apply(null, [locale, key, vm, values]);
      if (isString(missingRet)) {
        return missingRet;
      }
    } else {
      if (!this._isSilentTranslationWarn(key)) {
        warn("Cannot translate the value of keypath '" + key + "'. " + 'Use the value of keypath as default.');
      }
    }
    if (this._formatFallbackMessages) {
      var parsedArgs = parseArgs.apply(void 0, values);
      return this._render(key, interpolateMode, parsedArgs.params, key);
    } else {
      return key;
    }
  };
  VueI18n.prototype._isFallbackRoot = function _isFallbackRoot(val) {
    return !val && !isNull(this._root) && this._fallbackRoot;
  };
  VueI18n.prototype._isSilentFallbackWarn = function _isSilentFallbackWarn(key) {
    return this._silentFallbackWarn instanceof RegExp ? this._silentFallbackWarn.test(key) : this._silentFallbackWarn;
  };
  VueI18n.prototype._isSilentFallback = function _isSilentFallback(locale, key) {
    return this._isSilentFallbackWarn(key) && (this._isFallbackRoot() || locale !== this.fallbackLocale);
  };
  VueI18n.prototype._isSilentTranslationWarn = function _isSilentTranslationWarn(key) {
    return this._silentTranslationWarn instanceof RegExp ? this._silentTranslationWarn.test(key) : this._silentTranslationWarn;
  };
  VueI18n.prototype._interpolate = function _interpolate(locale, message, key, host, interpolateMode, values, visitedLinkStack) {
    if (!message) {
      return null;
    }
    var pathRet = this._path.getPathValue(message, key);
    if (isArray(pathRet) || isPlainObject(pathRet)) {
      return pathRet;
    }
    var ret;
    if (isNull(pathRet)) {
      if (isPlainObject(message)) {
        ret = message[key];
        if (!(isString(ret) || isFunction(ret))) {
          if (!this._isSilentTranslationWarn(key) && !this._isSilentFallback(locale, key)) {
            warn("Value of key '" + key + "' is not a string or function !");
          }
          return null;
        }
      } else {
        return null;
      }
    } else {
      if (isString(pathRet) || isFunction(pathRet)) {
        ret = pathRet;
      } else {
        if (!this._isSilentTranslationWarn(key) && !this._isSilentFallback(locale, key)) {
          warn("Value of key '" + key + "' is not a string or function!");
        }
        return null;
      }
    }
    if (isString(ret) && (ret.indexOf('@:') >= 0 || ret.indexOf('@.') >= 0)) {
      ret = this._link(locale, message, ret, host, 'raw', values, visitedLinkStack);
    }
    return this._render(ret, interpolateMode, values, key);
  };
  VueI18n.prototype._link = function _link(locale, message, str, host, interpolateMode, values, visitedLinkStack) {
    var ret = str;
    var matches = ret.match(linkKeyMatcher);
    for (var idx in matches) {
      if (!matches.hasOwnProperty(idx)) {
        continue;
      }
      var link = matches[idx];
      var linkKeyPrefixMatches = link.match(linkKeyPrefixMatcher);
      var linkPrefix = linkKeyPrefixMatches[0];
      var formatterName = linkKeyPrefixMatches[1];
      var linkPlaceholder = link.replace(linkPrefix, '').replace(bracketsMatcher, '');
      if (includes(visitedLinkStack, linkPlaceholder)) {
        {
          warn('Circular reference found. "' + link + '" is already visited in the chain of ' + visitedLinkStack.reverse().join(' <- '));
        }
        return ret;
      }
      visitedLinkStack.push(linkPlaceholder);
      var translated = this._interpolate(locale, message, linkPlaceholder, host, interpolateMode === 'raw' ? 'string' : interpolateMode, interpolateMode === 'raw' ? undefined : values, visitedLinkStack);
      if (this._isFallbackRoot(translated)) {
        if (!this._isSilentTranslationWarn(linkPlaceholder)) {
          warn("Fall back to translate the link placeholder '" + linkPlaceholder + "' with root locale.");
        }
        if (!this._root) {
          throw Error('unexpected error');
        }
        var root = this._root.$i18n;
        translated = root._translate(root._getMessages(), root.locale, root.fallbackLocale, linkPlaceholder, host, interpolateMode, values);
      }
      translated = this._warnDefault(locale, linkPlaceholder, translated, host, isArray(values) ? values : [values], interpolateMode);
      if (this._modifiers.hasOwnProperty(formatterName)) {
        translated = this._modifiers[formatterName](translated);
      } else if (defaultModifiers.hasOwnProperty(formatterName)) {
        translated = defaultModifiers[formatterName](translated);
      }
      visitedLinkStack.pop();
      ret = !translated ? ret : ret.replace(link, translated);
    }
    return ret;
  };
  VueI18n.prototype._createMessageContext = function _createMessageContext(values, formatter, path, interpolateMode) {
    var this$1 = this;
    var _list = isArray(values) ? values : [];
    var _named = isObject(values) ? values : {};
    var list = function (index) {
      return _list[index];
    };
    var named = function (key) {
      return _named[key];
    };
    var messages = this._getMessages();
    var locale = this.locale;
    return {
      list: list,
      named: named,
      values: values,
      formatter: formatter,
      path: path,
      messages: messages,
      locale: locale,
      linked: function (linkedKey) {
        return this$1._interpolate(locale, messages[locale] || {}, linkedKey, null, interpolateMode, undefined, [linkedKey]);
      }
    };
  };
  VueI18n.prototype._render = function _render(message, interpolateMode, values, path) {
    if (isFunction(message)) {
      return message(this._createMessageContext(values, this._formatter || defaultFormatter, path, interpolateMode));
    }
    var ret = this._formatter.interpolate(message, values, path);
    if (!ret) {
      ret = defaultFormatter.interpolate(message, values, path);
    }
    return interpolateMode === 'string' && !isString(ret) ? ret.join('') : ret;
  };
  VueI18n.prototype._appendItemToChain = function _appendItemToChain(chain, item, blocks) {
    var follow = false;
    if (!includes(chain, item)) {
      follow = true;
      if (item) {
        follow = item[item.length - 1] !== '!';
        item = item.replace(/!/g, '');
        chain.push(item);
        if (blocks && blocks[item]) {
          follow = blocks[item];
        }
      }
    }
    return follow;
  };
  VueI18n.prototype._appendLocaleToChain = function _appendLocaleToChain(chain, locale, blocks) {
    var follow;
    var tokens = locale.split('-');
    do {
      var item = tokens.join('-');
      follow = this._appendItemToChain(chain, item, blocks);
      tokens.splice(-1, 1);
    } while (tokens.length && follow === true);
    return follow;
  };
  VueI18n.prototype._appendBlockToChain = function _appendBlockToChain(chain, block, blocks) {
    var follow = true;
    for (var i = 0; i < block.length && isBoolean(follow); i++) {
      var locale = block[i];
      if (isString(locale)) {
        follow = this._appendLocaleToChain(chain, locale, blocks);
      }
    }
    return follow;
  };
  VueI18n.prototype._getLocaleChain = function _getLocaleChain(start, fallbackLocale) {
    if (start === '') {
      return [];
    }
    if (!this._localeChainCache) {
      this._localeChainCache = {};
    }
    var chain = this._localeChainCache[start];
    if (!chain) {
      if (!fallbackLocale) {
        fallbackLocale = this.fallbackLocale;
      }
      chain = [];
      var block = [start];
      while (isArray(block)) {
        block = this._appendBlockToChain(chain, block, fallbackLocale);
      }
      var defaults;
      if (isArray(fallbackLocale)) {
        defaults = fallbackLocale;
      } else if (isObject(fallbackLocale)) {
        if (fallbackLocale['default']) {
          defaults = fallbackLocale['default'];
        } else {
          defaults = null;
        }
      } else {
        defaults = fallbackLocale;
      }
      if (isString(defaults)) {
        block = [defaults];
      } else {
        block = defaults;
      }
      if (block) {
        this._appendBlockToChain(chain, block, null);
      }
      this._localeChainCache[start] = chain;
    }
    return chain;
  };
  VueI18n.prototype._translate = function _translate(messages, locale, fallback, key, host, interpolateMode, args) {
    var chain = this._getLocaleChain(locale, fallback);
    var res;
    for (var i = 0; i < chain.length; i++) {
      var step = chain[i];
      res = this._interpolate(step, messages[step], key, host, interpolateMode, args, [key]);
      if (!isNull(res)) {
        if (step !== locale && 'development' !== 'production' && !this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
          warn("Fall back to translate the keypath '" + key + "' with '" + step + "' locale.");
        }
        return res;
      }
    }
    return null;
  };
  VueI18n.prototype._t = function _t(key, _locale, messages, host) {
    var ref;
    var values = [],
      len = arguments.length - 4;
    while (len-- > 0) values[len] = arguments[len + 4];
    if (!key) {
      return '';
    }
    var parsedArgs = parseArgs.apply(void 0, values);
    if (this._escapeParameterHtml) {
      parsedArgs.params = escapeParams(parsedArgs.params);
    }
    var locale = parsedArgs.locale || _locale;
    var ret = this._translate(messages, locale, this.fallbackLocale, key, host, 'string', parsedArgs.params);
    if (this._isFallbackRoot(ret)) {
      if (!this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
        warn("Fall back to translate the keypath '" + key + "' with root locale.");
      }
      if (!this._root) {
        throw Error('unexpected error');
      }
      return (ref = this._root).$t.apply(ref, [key].concat(values));
    } else {
      ret = this._warnDefault(locale, key, ret, host, values, 'string');
      if (this._postTranslation && ret !== null && ret !== undefined) {
        ret = this._postTranslation(ret, key);
      }
      return ret;
    }
  };
  VueI18n.prototype.t = function t(key) {
    var ref;
    var values = [],
      len = arguments.length - 1;
    while (len-- > 0) values[len] = arguments[len + 1];
    return (ref = this)._t.apply(ref, [key, this.locale, this._getMessages(), null].concat(values));
  };
  VueI18n.prototype._i = function _i(key, locale, messages, host, values) {
    var ret = this._translate(messages, locale, this.fallbackLocale, key, host, 'raw', values);
    if (this._isFallbackRoot(ret)) {
      if (!this._isSilentTranslationWarn(key)) {
        warn("Fall back to interpolate the keypath '" + key + "' with root locale.");
      }
      if (!this._root) {
        throw Error('unexpected error');
      }
      return this._root.$i18n.i(key, locale, values);
    } else {
      return this._warnDefault(locale, key, ret, host, [values], 'raw');
    }
  };
  VueI18n.prototype.i = function i(key, locale, values) {
    if (!key) {
      return '';
    }
    if (!isString(locale)) {
      locale = this.locale;
    }
    return this._i(key, locale, this._getMessages(), null, values);
  };
  VueI18n.prototype._tc = function _tc(key, _locale, messages, host, choice) {
    var ref;
    var values = [],
      len = arguments.length - 5;
    while (len-- > 0) values[len] = arguments[len + 5];
    if (!key) {
      return '';
    }
    if (choice === undefined) {
      choice = 1;
    }
    var predefined = { count: choice, n: choice };
    var parsedArgs = parseArgs.apply(void 0, values);
    parsedArgs.params = Object.assign(predefined, parsedArgs.params);
    values = parsedArgs.locale === null ? [parsedArgs.params] : [parsedArgs.locale, parsedArgs.params];
    return this.fetchChoice((ref = this)._t.apply(ref, [key, _locale, messages, host].concat(values)), choice);
  };
  VueI18n.prototype.fetchChoice = function fetchChoice(message, choice) {
    if (!message || !isString(message)) {
      return null;
    }
    var choices = message.split('|');
    choice = this.getChoiceIndex(choice, choices.length);
    if (!choices[choice]) {
      return message;
    }
    return choices[choice].trim();
  };
  VueI18n.prototype.tc = function tc(key, choice) {
    var ref;
    var values = [],
      len = arguments.length - 2;
    while (len-- > 0) values[len] = arguments[len + 2];
    return (ref = this)._tc.apply(ref, [key, this.locale, this._getMessages(), null, choice].concat(values));
  };
  VueI18n.prototype._te = function _te(key, locale, messages) {
    var args = [],
      len = arguments.length - 3;
    while (len-- > 0) args[len] = arguments[len + 3];
    var _locale = parseArgs.apply(void 0, args).locale || locale;
    return this._exist(messages[_locale], key);
  };
  VueI18n.prototype.te = function te(key, locale) {
    return this._te(key, this.locale, this._getMessages(), locale);
  };
  VueI18n.prototype.getLocaleMessage = function getLocaleMessage(locale) {
    return looseClone(this._vm.messages[locale] || {});
  };
  VueI18n.prototype.setLocaleMessage = function setLocaleMessage(locale, message) {
    if (this._warnHtmlInMessage === 'warn' || this._warnHtmlInMessage === 'error') {
      this._checkLocaleMessage(locale, this._warnHtmlInMessage, message);
    }
    this._vm.$set(this._vm.messages, locale, message);
  };
  VueI18n.prototype.mergeLocaleMessage = function mergeLocaleMessage(locale, message) {
    if (this._warnHtmlInMessage === 'warn' || this._warnHtmlInMessage === 'error') {
      this._checkLocaleMessage(locale, this._warnHtmlInMessage, message);
    }
    this._vm.$set(this._vm.messages, locale, merge(typeof this._vm.messages[locale] !== 'undefined' && Object.keys(this._vm.messages[locale]).length ? Object.assign({}, this._vm.messages[locale]) : {}, message));
  };
  VueI18n.prototype.getDateTimeFormat = function getDateTimeFormat(locale) {
    return looseClone(this._vm.dateTimeFormats[locale] || {});
  };
  VueI18n.prototype.setDateTimeFormat = function setDateTimeFormat(locale, format) {
    this._vm.$set(this._vm.dateTimeFormats, locale, format);
    this._clearDateTimeFormat(locale, format);
  };
  VueI18n.prototype.mergeDateTimeFormat = function mergeDateTimeFormat(locale, format) {
    this._vm.$set(this._vm.dateTimeFormats, locale, merge(this._vm.dateTimeFormats[locale] || {}, format));
    this._clearDateTimeFormat(locale, format);
  };
  VueI18n.prototype._clearDateTimeFormat = function _clearDateTimeFormat(locale, format) {
    for (var key in format) {
      var id = locale + '__' + key;
      if (!this._dateTimeFormatters.hasOwnProperty(id)) {
        continue;
      }
      delete this._dateTimeFormatters[id];
    }
  };
  VueI18n.prototype._localizeDateTime = function _localizeDateTime(value, locale, fallback, dateTimeFormats, key) {
    var _locale = locale;
    var formats = dateTimeFormats[_locale];
    var chain = this._getLocaleChain(locale, fallback);
    for (var i = 0; i < chain.length; i++) {
      var current = _locale;
      var step = chain[i];
      formats = dateTimeFormats[step];
      _locale = step;
      if (isNull(formats) || isNull(formats[key])) {
        if (step !== locale && 'development' !== 'production' && !this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
          warn("Fall back to '" + step + "' datetime formats from '" + current + "' datetime formats.");
        }
      } else {
        break;
      }
    }
    if (isNull(formats) || isNull(formats[key])) {
      return null;
    } else {
      var format = formats[key];
      var id = _locale + '__' + key;
      var formatter = this._dateTimeFormatters[id];
      if (!formatter) {
        formatter = this._dateTimeFormatters[id] = new Intl.DateTimeFormat(_locale, format);
      }
      return formatter.format(value);
    }
  };
  VueI18n.prototype._d = function _d(value, locale, key) {
    if (!VueI18n.availabilities.dateTimeFormat) {
      warn('Cannot format a Date value due to not supported Intl.DateTimeFormat.');
      return '';
    }
    if (!key) {
      return new Intl.DateTimeFormat(locale).format(value);
    }
    var ret = this._localizeDateTime(value, locale, this.fallbackLocale, this._getDateTimeFormats(), key);
    if (this._isFallbackRoot(ret)) {
      if (!this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
        warn("Fall back to datetime localization of root: key '" + key + "'.");
      }
      if (!this._root) {
        throw Error('unexpected error');
      }
      return this._root.$i18n.d(value, key, locale);
    } else {
      return ret || '';
    }
  };
  VueI18n.prototype.d = function d(value) {
    var args = [],
      len = arguments.length - 1;
    while (len-- > 0) args[len] = arguments[len + 1];
    var locale = this.locale;
    var key = null;
    if (args.length === 1) {
      if (isString(args[0])) {
        key = args[0];
      } else if (isObject(args[0])) {
        if (args[0].locale) {
          locale = args[0].locale;
        }
        if (args[0].key) {
          key = args[0].key;
        }
      }
    } else if (args.length === 2) {
      if (isString(args[0])) {
        key = args[0];
      }
      if (isString(args[1])) {
        locale = args[1];
      }
    }
    return this._d(value, locale, key);
  };
  VueI18n.prototype.getNumberFormat = function getNumberFormat(locale) {
    return looseClone(this._vm.numberFormats[locale] || {});
  };
  VueI18n.prototype.setNumberFormat = function setNumberFormat(locale, format) {
    this._vm.$set(this._vm.numberFormats, locale, format);
    this._clearNumberFormat(locale, format);
  };
  VueI18n.prototype.mergeNumberFormat = function mergeNumberFormat(locale, format) {
    this._vm.$set(this._vm.numberFormats, locale, merge(this._vm.numberFormats[locale] || {}, format));
    this._clearNumberFormat(locale, format);
  };
  VueI18n.prototype._clearNumberFormat = function _clearNumberFormat(locale, format) {
    for (var key in format) {
      var id = locale + '__' + key;
      if (!this._numberFormatters.hasOwnProperty(id)) {
        continue;
      }
      delete this._numberFormatters[id];
    }
  };
  VueI18n.prototype._getNumberFormatter = function _getNumberFormatter(value, locale, fallback, numberFormats, key, options) {
    var _locale = locale;
    var formats = numberFormats[_locale];
    var chain = this._getLocaleChain(locale, fallback);
    for (var i = 0; i < chain.length; i++) {
      var current = _locale;
      var step = chain[i];
      formats = numberFormats[step];
      _locale = step;
      if (isNull(formats) || isNull(formats[key])) {
        if (step !== locale && 'development' !== 'production' && !this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
          warn("Fall back to '" + step + "' number formats from '" + current + "' number formats.");
        }
      } else {
        break;
      }
    }
    if (isNull(formats) || isNull(formats[key])) {
      return null;
    } else {
      var format = formats[key];
      var formatter;
      if (options) {
        formatter = new Intl.NumberFormat(_locale, Object.assign({}, format, options));
      } else {
        var id = _locale + '__' + key;
        formatter = this._numberFormatters[id];
        if (!formatter) {
          formatter = this._numberFormatters[id] = new Intl.NumberFormat(_locale, format);
        }
      }
      return formatter;
    }
  };
  VueI18n.prototype._n = function _n(value, locale, key, options) {
    if (!VueI18n.availabilities.numberFormat) {
      {
        warn('Cannot format a Number value due to not supported Intl.NumberFormat.');
      }
      return '';
    }
    if (!key) {
      var nf = !options ? new Intl.NumberFormat(locale) : new Intl.NumberFormat(locale, options);
      return nf.format(value);
    }
    var formatter = this._getNumberFormatter(value, locale, this.fallbackLocale, this._getNumberFormats(), key, options);
    var ret = formatter && formatter.format(value);
    if (this._isFallbackRoot(ret)) {
      if (!this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
        warn("Fall back to number localization of root: key '" + key + "'.");
      }
      if (!this._root) {
        throw Error('unexpected error');
      }
      return this._root.$i18n.n(value, Object.assign({}, { key: key, locale: locale }, options));
    } else {
      return ret || '';
    }
  };
  VueI18n.prototype.n = function n(value) {
    var args = [],
      len = arguments.length - 1;
    while (len-- > 0) args[len] = arguments[len + 1];
    var locale = this.locale;
    var key = null;
    var options = null;
    if (args.length === 1) {
      if (isString(args[0])) {
        key = args[0];
      } else if (isObject(args[0])) {
        if (args[0].locale) {
          locale = args[0].locale;
        }
        if (args[0].key) {
          key = args[0].key;
        }
        options = Object.keys(args[0]).reduce(function (acc, key) {
          var obj;
          if (includes(numberFormatKeys, key)) {
            return Object.assign({}, acc, ((obj = {}), (obj[key] = args[0][key]), obj));
          }
          return acc;
        }, null);
      }
    } else if (args.length === 2) {
      if (isString(args[0])) {
        key = args[0];
      }
      if (isString(args[1])) {
        locale = args[1];
      }
    }
    return this._n(value, locale, key, options);
  };
  VueI18n.prototype._ntp = function _ntp(value, locale, key, options) {
    if (!VueI18n.availabilities.numberFormat) {
      {
        warn('Cannot format to parts a Number value due to not supported Intl.NumberFormat.');
      }
      return [];
    }
    if (!key) {
      var nf = !options ? new Intl.NumberFormat(locale) : new Intl.NumberFormat(locale, options);
      return nf.formatToParts(value);
    }
    var formatter = this._getNumberFormatter(value, locale, this.fallbackLocale, this._getNumberFormats(), key, options);
    var ret = formatter && formatter.formatToParts(value);
    if (this._isFallbackRoot(ret)) {
      if (!this._isSilentTranslationWarn(key)) {
        warn("Fall back to format number to parts of root: key '" + key + "' .");
      }
      if (!this._root) {
        throw Error('unexpected error');
      }
      return this._root.$i18n._ntp(value, locale, key, options);
    } else {
      return ret || [];
    }
  };
  Object.defineProperties(VueI18n.prototype, prototypeAccessors);
  var availabilities;
  Object.defineProperty(VueI18n, 'availabilities', {
    get: function get() {
      if (!availabilities) {
        var intlDefined = typeof Intl !== 'undefined';
        availabilities = { dateTimeFormat: intlDefined && typeof Intl.DateTimeFormat !== 'undefined', numberFormat: intlDefined && typeof Intl.NumberFormat !== 'undefined' };
      }
      return availabilities;
    }
  });
  VueI18n.install = install;
  VueI18n.version = '8.25.0';
  return VueI18n;
});