import { getAllCountries } from './data'

const allCountries = getAllCountries();

const intlTelInputGlobals = {
    getInstance: (input) => {
        const id = input.getAttribute('data-intl-tel-input-id');
        return window.intlTelInputGlobals.instances[id];
    },
    instances: {},
    // using a global like this allows us to mock it in the tests
    documentReady: () => document.readyState === 'complete',
};

if (typeof window === 'object') window.intlTelInputGlobals = intlTelInputGlobals;

// these vars persist through all instances of the plugin
let id = 0;
const defaults = {
    // whether or not to allow the dropdown
    allowDropdown: true,
    // if there is just a dial code in the input: remove it on blur
    autoHideDialCode: true,
    // add a placeholder in the input with an example number for the selected country
    autoPlaceholder: 'polite',
    // modify the parentClass
    customContainer: '',
    // modify the auto placeholder
    customPlaceholder: null,
    // append menu to specified element
    dropdownContainer: null,
    // don't display these countries
    excludeCountries: [],
    // format the input value during initialisation and on setNumber
    formatOnDisplay: true,
    // geoIp lookup function
    geoIpLookup: null,
    // inject a hidden input with this name, and on submit, populate it with the result of getNumber
    hiddenInput: '',
    // initial country
    initialCountry: '',
    // localized country names e.g. { 'de': 'Deutschland' }
    localizedCountries: null,
    // don't insert international dial codes
    nationalMode: true,
    // display only these countries
    onlyCountries: [],
    // number type to use for placeholders
    placeholderNumberType: 'MOBILE',
    // the countries at the top of the list. defaults to united states and united kingdom
    preferredCountries: ['us', 'gb'],
    // display the country dial code next to the selected flag so it's not part of the typed number
    separateDialCode: false,
    // specify the path to the libphonenumber script to enable validation/formatting
    utilsScript: '',
};
// https://en.wikipedia.org/wiki/List_of_North_American_Numbering_Plan_area_codes#Non-geographic_area_codes
const regionlessNanpNumbers = ['800', '822', '833', '844', '855', '866', '877', '880', '881', '882', '883', '884', '885', '886', '887', '888', '889'];


// utility function to iterate over an object. can't use Object.entries or native forEach because
// of IE11
const forEachProp = (obj, callback) => {
    const keys = Object.keys(obj);
    for (let i = 0; i < keys.length; i++) {
        callback(keys[i], obj[keys[i]]);
    }
};


// run a method on each instance of the plugin
const forEachInstance = (method) => {
    forEachProp(window.intlTelInputGlobals.instances, (key) => {
        window.intlTelInputGlobals.instances[key][method]();
    });
};


// this is our plugin class that we will create an instance of
// eslint-disable-next-line no-unused-vars
export default class IntlTel {
    constructor(input, options) {
        this.id = id++;
        this.telInput = input;

        this.activeItem = null;
        this.highlightedItem = null;

        // process specified options / defaults
        // alternative to Object.assign, which isn't supported by IE11
        const customOptions = options || {};
        this.options = {};
        forEachProp(defaults, (key, value) => {
            this.options[key] = (customOptions.hasOwnProperty(key)) ? customOptions[key] : value;
        });

        this.hadInitialPlaceholder = Boolean(input.getAttribute('placeholder'));
    }

    _init() {
        // if in nationalMode, disable options relating to dial codes
        if (this.options.nationalMode) this.options.autoHideDialCode = false;

        // if separateDialCode then doesn't make sense to A) insert dial code into input
        // (autoHideDialCode), and B) display national numbers (because we're displaying the country
        // dial code next to them)
        if (this.options.separateDialCode) {
            this.options.autoHideDialCode = this.options.nationalMode = false;
        }

        // we cannot just test screen size as some smartphones/website meta tags will report desktop
        // resolutions
        // Note: for some reason jasmine breaks if you put this in the main Plugin function with the
        // rest of these declarations
        // Note: to target Android Mobiles (and not Tablets), we must find 'Android' and 'Mobile'
        this.isMobile = /Android.+Mobile|webOS|iPhone|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent);

        if (this.isMobile) {
            // trigger the mobile dropdown css
            document.body.classList.add('iti-mobile');

            // on mobile, we want a full screen dropdown, so we must append it to the body
            if (!this.options.dropdownContainer) this.options.dropdownContainer = document.body;
        }

        // these promises get resolved when their individual requests complete
        // this way the dev can do something like iti.promise.then(...) to know when all requests are
        // complete
        if (typeof Promise !== 'undefined') {
            const autoCountryPromise = new Promise((resolve, reject) => {
                this.resolveAutoCountryPromise = resolve;
                this.rejectAutoCountryPromise = reject;
            });
            const utilsScriptPromise = new Promise((resolve, reject) => {
                this.resolveUtilsScriptPromise = resolve;
                this.rejectUtilsScriptPromise = reject;
            });
            this.promise = Promise.all([autoCountryPromise, utilsScriptPromise]);
        } else {
            // prevent errors when Promise doesn't exist
            this.resolveAutoCountryPromise = this.rejectAutoCountryPromise = () => { };
            this.resolveUtilsScriptPromise = this.rejectUtilsScriptPromise = () => { };
        }

        // in various situations there could be no country selected initially, but we need to be able
        // to assume this variable exists
        this.selectedCountryData = {};

        // process all the data: onlyCountries, excludeCountries, preferredCountries etc
        this._processCountryData();

        // generate the markup
        this._generateMarkup();

        // set the initial state of the input value and the selected flag
        this._setInitialState();

        // start all of the event listeners: autoHideDialCode, input keydown, selectedFlag click
        this._initListeners();

        // utils script, and auto country
        this._initRequests();
    }


    /********************
     *  PRIVATE METHODS
     ********************/


    // prepare all of the country data, including onlyCountries, excludeCountries and
    // preferredCountries options
    _processCountryData() {
        // process onlyCountries or excludeCountries array if present
        this._processAllCountries();

        // process the countryCodes map
        this._processCountryCodes();

        // process the preferredCountries
        this._processPreferredCountries();

        // translate countries according to localizedCountries option
        if (this.options.localizedCountries) this._translateCountriesByLocale();

        // sort countries by name
        if (this.options.onlyCountries.length || this.options.localizedCountries) {
            this.countries.sort(this._countryNameSort);
        }
    }


    // add a country code to this.countryCodes
    _addCountryCode(iso2, countryCode, priority) {
        if (countryCode.length > this.countryCodeMaxLen) {
            this.countryCodeMaxLen = countryCode.length;
        }
        if (!this.countryCodes.hasOwnProperty(countryCode)) {
            this.countryCodes[countryCode] = [];
        }
        // bail if we already have this country for this countryCode
        for (let i = 0; i < this.countryCodes[countryCode].length; i++) {
            if (this.countryCodes[countryCode][i] === iso2) return;
        }
        // check for undefined as 0 is falsy
        const index = (priority !== undefined) ? priority : this.countryCodes[countryCode].length;
        this.countryCodes[countryCode][index] = iso2;
    }


    // process onlyCountries or excludeCountries array if present
    _processAllCountries() {
        if (this.options.onlyCountries.length) {
            const lowerCaseOnlyCountries = this.options.onlyCountries.map(
                country => country.toLowerCase()
            );
            this.countries = allCountries.filter(
                country => lowerCaseOnlyCountries.indexOf(country.iso2) > -1
            );
        } else if (this.options.excludeCountries.length) {
            const lowerCaseExcludeCountries = this.options.excludeCountries.map(
                country => country.toLowerCase()
            );
            this.countries = allCountries.filter(
                country => lowerCaseExcludeCountries.indexOf(country.iso2) === -1
            );
        } else {
            this.countries = allCountries;
        }
    }

    // Translate Countries by object literal provided on config
    _translateCountriesByLocale() {
        for (let i = 0; i < this.countries.length; i++) {
            const iso = this.countries[i].iso2.toLowerCase();
            if (this.options.localizedCountries.hasOwnProperty(iso)) {
                this.countries[i].name = this.options.localizedCountries[iso];
            }
        }
    }

    // sort by country name
    _countryNameSort(a, b) {
        return a.name.localeCompare(b.name);
    }


    // process the countryCodes map
    _processCountryCodes() {
        this.countryCodeMaxLen = 0;
        // here we store just dial codes
        this.dialCodes = {};
        // here we store "country codes" (both dial codes and their area codes)
        this.countryCodes = {};

        // first: add dial codes
        for (let i = 0; i < this.countries.length; i++) {
            const c = this.countries[i];
            if (!this.dialCodes[c.dialCode]) this.dialCodes[c.dialCode] = true;
            this._addCountryCode(c.iso2, c.dialCode, c.priority);
        }

        // next: add area codes
        // this is a second loop over countries, to make sure we have all of the "root" countries
        // already in the map, so that we can access them, as each time we add an area code substring
        // to the map, we also need to include the "root" country's code, as that also matches
        for (let i = 0; i < this.countries.length; i++) {
            const c = this.countries[i];
            // area codes
            if (c.areaCodes) {
                const rootCountryCode = this.countryCodes[c.dialCode][0];
                // for each area code
                for (let j = 0; j < c.areaCodes.length; j++) {
                    const areaCode = c.areaCodes[j];
                    // for each digit in the area code to add all partial matches as well
                    for (let k = 1; k < areaCode.length; k++) {
                        const partialDialCode = c.dialCode + areaCode.substr(0, k);
                        // start with the root country, as that also matches this dial code
                        this._addCountryCode(rootCountryCode, partialDialCode);
                        this._addCountryCode(c.iso2, partialDialCode);
                    }
                    // add the full area code
                    this._addCountryCode(c.iso2, c.dialCode + areaCode);
                }
            }
        }
    }


    // process preferred countries - iterate through the preferences, fetching the country data for
    // each one
    _processPreferredCountries() {
        this.preferredCountries = [];
        for (let i = 0; i < this.options.preferredCountries.length; i++) {
            const countryCode = this.options.preferredCountries[i].toLowerCase();
            const countryData = this._getCountryData(countryCode, false, true);
            if (countryData) this.preferredCountries.push(countryData);
        }
    }


    // create a DOM element
    _createEl(name, attrs, container) {
        const el = document.createElement(name);
        if (attrs) forEachProp(attrs, (key, value) => el.setAttribute(key, value));
        if (container) container.appendChild(el);
        return el;
    }


    // generate all of the markup for the plugin: the selected flag overlay, and the dropdown
    _generateMarkup() {
        // if autocomplete does not exist on the element and its form, then
        // prevent autocomplete as there's no safe, cross-browser event we can react to, so it can
        // easily put the plugin in an inconsistent state e.g. the wrong flag selected for the
        // autocompleted number, which on submit could mean wrong number is saved (esp in nationalMode)
        if (!this.telInput.hasAttribute('autocomplete') && !(this.telInput.form && this.telInput.form.hasAttribute('autocomplete'))) {
            this.telInput.setAttribute('autocomplete', 'off');
        }

        // containers (mostly for positioning)
        let parentClass = 'iti';
        if (this.options.allowDropdown) {
            parentClass += ' iti--allow-dropdown';
        }
        if (this.options.separateDialCode) {
            parentClass += ' iti--separate-dial-code';
        }
        if (this.options.customContainer) {
            parentClass += ' ';
            parentClass += this.options.customContainer;
        }

        const wrapper = this._createEl('div', { class: parentClass });
        this.telInput.parentNode.insertBefore(wrapper, this.telInput);
        this.flagsContainer = this._createEl('div', { class: 'iti__flag-container' }, wrapper);
        wrapper.appendChild(this.telInput);

        // selected flag (displayed to left of input)
        this.selectedFlag = this._createEl('div', {
            class: 'iti__selected-flag',
            role: 'combobox',
            'aria-controls': `iti-${this.id}__country-listbox`,
            'aria-owns': `iti-${this.id}__country-listbox`,
            'aria-expanded': 'false',
        }, this.flagsContainer);
        this.selectedFlagInner = this._createEl('div', { class: 'iti__flag' }, this.selectedFlag);

        if (this.options.separateDialCode) {
            this.selectedDialCode = this._createEl('div', { class: 'iti__selected-dial-code' }, this.selectedFlag);
        }

        if (this.options.allowDropdown) {
            // make element focusable and tab navigable
            this.selectedFlag.setAttribute('tabindex', '0');
            this.dropdownArrow = this._createEl('div', { class: 'iti__arrow' }, this.selectedFlag);

            // country dropdown: preferred countries, then divider, then all countries
            this.countryList = this._createEl('ul', {
                class: 'iti__country-list iti__hide',
                id: `iti-${this.id}__country-listbox`,
                role: 'listbox',
                'aria-label': 'List of countries',
            });
            if (this.preferredCountries.length) {
                this._appendListItems(this.preferredCountries, 'iti__preferred', true);
                this._createEl('li', {
                    class: 'iti__divider',
                    role: 'separator',
                    'aria-disabled': 'true',
                }, this.countryList);
            }
            this._appendListItems(this.countries, 'iti__standard');

            // create dropdownContainer markup
            if (this.options.dropdownContainer) {
                this.dropdown = this._createEl('div', { class: 'iti iti--container' });
                this.dropdown.appendChild(this.countryList);
            } else {
                this.flagsContainer.appendChild(this.countryList);
            }
        }

        if (this.options.hiddenInput) {
            let hiddenInputName = this.options.hiddenInput;
            const name = this.telInput.getAttribute('name');
            if (name) {
                const i = name.lastIndexOf('[');
                // if input name contains square brackets, then give the hidden input the same name,
                // replacing the contents of the last set of brackets with the given hiddenInput name
                if (i !== -1) hiddenInputName = `${name.substr(0, i)}[${hiddenInputName}]`;
            }
            this.hiddenInput = this._createEl('input', {
                type: 'hidden',
                name: hiddenInputName,
            });
            wrapper.appendChild(this.hiddenInput);
        }
    }


    // add a country <li> to the countryList <ul> container
    _appendListItems(countries, className, preferred) {
        // we create so many DOM elements, it is faster to build a temp string
        // and then add everything to the DOM in one go at the end
        let tmp = '';
        // for each country
        for (let i = 0; i < countries.length; i++) {
            const c = countries[i];
            const idSuffix = preferred ? '-preferred' : '';
            // open the list item
            tmp += `<li class='iti__country ${className}' tabIndex='-1' id='iti-${this.id}__item-${c.iso2}${idSuffix}' role='option' data-dial-code='${c.dialCode}' data-country-code='${c.iso2}' aria-selected='false'>`;
            // add the flag
            tmp += `<div class='iti__flag-box'><div class='iti__flag iti__${c.iso2}'></div></div>`;
            // and the country name and dial code
            tmp += `<span class='iti__country-name'>${c.name}</span>`;
            tmp += `<span class='iti__dial-code'>+${c.dialCode}</span>`;
            // close the list item
            tmp += '</li>';
        }
        this.countryList.insertAdjacentHTML('beforeend', tmp);
    }


    // set the initial state of the input value and the selected flag by:
    // 1. extracting a dial code from the given number
    // 2. using explicit initialCountry
    // 3. picking the first preferred country
    // 4. picking the first country
    _setInitialState() {
        // fix firefox bug: when first load page (with input with value set to number with intl dial
        // code) and initialising plugin removes the dial code from the input, then refresh page,
        // and we try to init plugin again but this time on number without dial code so get grey flag
        const attributeValue = this.telInput.getAttribute('value');
        const inputValue = this.telInput.value;
        const useAttribute = (attributeValue && attributeValue.charAt(0) === '+' && (!inputValue || inputValue.charAt(0) !== '+'));
        const val = useAttribute ? attributeValue : inputValue;
        const dialCode = this._getDialCode(val);
        const isRegionlessNanp = this._isRegionlessNanp(val);
        const {
            initialCountry,
            nationalMode,
            autoHideDialCode,
            separateDialCode,
        } = this.options;

        // if we already have a dial code, and it's not a regionlessNanp, we can go ahead and set the
        // flag, else fall back to the default country
        if (dialCode && !isRegionlessNanp) {
            this._updateFlagFromNumber(val);
        } else if (initialCountry !== 'auto') {
            // see if we should select a flag
            if (initialCountry) {
                this._setFlag(initialCountry.toLowerCase());
            } else {
                if (dialCode && isRegionlessNanp) {
                    // has intl dial code, is regionless nanp, and no initialCountry, so default to US
                    this._setFlag('us');
                } else {
                    // no dial code and no initialCountry, so default to first in list
                    this.defaultCountry = (this.preferredCountries.length) ? this.preferredCountries[0].iso2
                        : this.countries[0].iso2;
                    if (!val) {
                        this._setFlag(this.defaultCountry);
                    }
                }
            }

            // if empty and no nationalMode and no autoHideDialCode then insert the default dial code
            if (!val && !nationalMode && !autoHideDialCode && !separateDialCode) {
                this.telInput.value = `+${this.selectedCountryData.dialCode}`;
            }
        }
        // NOTE: if initialCountry is set to auto, that will be handled separately

        // format - note this wont be run after _updateDialCode as that's only called if no val
        if (val) this._updateValFromNumber(val);
    }


    // initialise the main event listeners: input keyup, and click selected flag
    _initListeners() {
        this._initKeyListeners();
        if (this.options.autoHideDialCode) this._initBlurListeners();
        if (this.options.allowDropdown) this._initDropdownListeners();
        if (this.hiddenInput) this._initHiddenInputListener();
    }


    // update hidden input on form submit
    _initHiddenInputListener() {
        this._handleHiddenInputSubmit = () => {
            this.hiddenInput.value = this.getNumber();
        };
        if (this.telInput.form) this.telInput.form.addEventListener('submit', this._handleHiddenInputSubmit);
    }


    // iterate through parent nodes to find the closest label ancestor, if it exists
    _getClosestLabel() {
        let el = this.telInput;
        while (el && el.tagName !== 'LABEL') el = el.parentNode;
        return el;
    }


    // initialise the dropdown listeners
    _initDropdownListeners() {
        // hack for input nested inside label (which is valid markup): clicking the selected-flag to
        // open the dropdown would then automatically trigger a 2nd click on the input which would
        // close it again
        this._handleLabelClick = (e) => {
            // if the dropdown is closed, then focus the input, else ignore the click
            if (this.countryList.classList.contains('iti__hide')) this.telInput.focus();
            else e.preventDefault();
        };
        const label = this._getClosestLabel();
        if (label) label.addEventListener('click', this._handleLabelClick);

        // toggle country dropdown on click
        this._handleClickSelectedFlag = () => {
            // only intercept this event if we're opening the dropdown
            // else let it bubble up to the top ("click-off-to-close" listener)
            // we cannot just stopPropagation as it may be needed to close another instance
            if (this.countryList.classList.contains('iti__hide') && !this.telInput.disabled && !this.telInput.readOnly) {
                this._showDropdown();
            }
        };
        this.selectedFlag.addEventListener('click', this._handleClickSelectedFlag);

        // open dropdown list if currently focused
        this._handleFlagsContainerKeydown = (e) => {
            const isDropdownHidden = this.countryList.classList.contains('iti__hide');

            if (isDropdownHidden && ['ArrowUp', 'Up', 'ArrowDown', 'Down', ' ', 'Enter'].indexOf(e.key) !== -1) {
                // prevent form from being submitted if "ENTER" was pressed
                e.preventDefault();
                // prevent event from being handled again by document
                e.stopPropagation();
                this._showDropdown();
            }

            // allow navigation from dropdown to input on TAB
            if (e.key === 'Tab') this._closeDropdown();
        };
        this.flagsContainer.addEventListener('keydown', this._handleFlagsContainerKeydown);
    }


    // init many requests: utils script / geo ip lookup
    _initRequests() {
        // if the user has specified the path to the utils script, fetch it on window.load, else resolve
        if (this.options.utilsScript && !window.intlTelInputUtils) {
            // if the plugin is being initialised after the window.load event has already been fired
            if (window.intlTelInputGlobals.documentReady()) {
                window.intlTelInputGlobals.loadUtils(this.options.utilsScript);
            } else {
                // wait until the load event so we don't block any other requests e.g. the flags image
                window.addEventListener('load', () => {
                    window.intlTelInputGlobals.loadUtils(this.options.utilsScript);
                });
            }
        } else this.resolveUtilsScriptPromise();

        if (this.options.initialCountry === 'auto') this._loadAutoCountry();
        else this.resolveAutoCountryPromise();
    }


    // perform the geo ip lookup
    _loadAutoCountry() {
        // 3 options:
        // 1) already loaded (we're done)
        // 2) not already started loading (start)
        // 3) already started loading (do nothing - just wait for loading callback to fire)
        if (window.intlTelInputGlobals.autoCountry) {
            this.handleAutoCountry();
        } else if (!window.intlTelInputGlobals.startedLoadingAutoCountry) {
            // don't do this twice!
            window.intlTelInputGlobals.startedLoadingAutoCountry = true;

            if (typeof this.options.geoIpLookup === 'function') {
                this.options.geoIpLookup((countryCode) => {
                    window.intlTelInputGlobals.autoCountry = countryCode.toLowerCase();
                    // tell all instances the auto country is ready
                    // TODO: this should just be the current instances
                    // UPDATE: use setTimeout in case their geoIpLookup function calls this callback straight
                    // away (e.g. if they have already done the geo ip lookup somewhere else). Using
                    // setTimeout means that the current thread of execution will finish before executing
                    // this, which allows the plugin to finish initialising.
                    setTimeout(() => forEachInstance('handleAutoCountry'));
                }, () => forEachInstance('rejectAutoCountryPromise'));
            }
        }
    }


    // initialize any key listeners
    _initKeyListeners() {
        // update flag on keyup
        this._handleKeyupEvent = () => {
            if (this._updateFlagFromNumber(this.telInput.value)) {
                this._triggerCountryChange();
            }
        };
        this.telInput.addEventListener('keyup', this._handleKeyupEvent);

        // update flag on cut/paste events (now supported in all major browsers)
        this._handleClipboardEvent = () => {
            // hack because "paste" event is fired before input is updated
            setTimeout(this._handleKeyupEvent);
        };
        this.telInput.addEventListener('cut', this._handleClipboardEvent);
        this.telInput.addEventListener('paste', this._handleClipboardEvent);
    }


    // adhere to the input's maxlength attr
    _cap(number) {
        const max = this.telInput.getAttribute('maxlength');
        return (max && number.length > max) ? number.substr(0, max) : number;
    }


    // listen for blur/submit (for autoHideDialCode feature)
    _initBlurListeners() {
        // on blur or form submit: if just a dial code then remove it
        this._handleSubmitOrBlurEvent = () => {
            this._removeEmptyDialCode();
        };
        if (this.telInput.form) this.telInput.form.addEventListener('submit', this._handleSubmitOrBlurEvent);
        this.telInput.addEventListener('blur', this._handleSubmitOrBlurEvent);

        // made the decision not to trigger blur() now, because would only do anything in the case
        // where they manually set the initial value to just a dial code, in which case they probably
        // want it to be displayed.
    }


    // clear the input if it just contains a dial code
    _removeEmptyDialCode() {
        if (this.telInput.value.charAt(0) === '+') {
            const numeric = this._getNumeric(this.telInput.value);
            // if just a plus, or if just a dial code
            if (!numeric || this.selectedCountryData.dialCode === numeric) {
                this.telInput.value = '';
            }
        }
    }


    // extract the numeric digits from the given string
    _getNumeric(s) {
        return s.replace(/\D/g, '');
    }


    // trigger a custom event on the input
    _trigger(name) {
        // have to use old school document.createEvent as IE11 doesn't support `new Event()` syntax
        const e = document.createEvent('Event');
        e.initEvent(name, true, true); // can bubble, and is cancellable
        this.telInput.dispatchEvent(e);
    }


    // show the dropdown
    _showDropdown() {
        this.countryList.classList.remove('iti__hide');
        this.selectedFlag.setAttribute('aria-expanded', 'true');

        this._setDropdownPosition();

        // update highlighting and scroll to active list item
        if (this.activeItem) {
            this._highlightListItem(this.activeItem, false);
            this._scrollTo(this.activeItem, true);
        }

        // bind all the dropdown-related listeners: mouseover, click, click-off, keydown
        this._bindDropdownListeners();

        // update the arrow
        this.dropdownArrow.classList.add('iti__arrow--up');

        this._trigger('open:countrydropdown');
    }


    // make sure the el has the className or not, depending on the value of shouldHaveClass
    _toggleClass(el, className, shouldHaveClass) {
        if (shouldHaveClass && !el.classList.contains(className)) el.classList.add(className);
        else if (!shouldHaveClass && el.classList.contains(className)) el.classList.remove(className);
    }


    // decide where to position dropdown (depends on position within viewport, and scroll)
    _setDropdownPosition() {
        if (this.options.dropdownContainer) {
            this.options.dropdownContainer.appendChild(this.dropdown);
        }

        if (!this.isMobile) {
            const pos = this.telInput.getBoundingClientRect();
            // windowTop from https://stackoverflow.com/a/14384091/217866
            const windowTop = window.pageYOffset || document.documentElement.scrollTop;
            const inputTop = pos.top + windowTop;
            const dropdownHeight = this.countryList.offsetHeight;
            // dropdownFitsBelow = (dropdownBottom < windowBottom)
            const dropdownFitsBelow = (inputTop + this.telInput.offsetHeight + dropdownHeight
                < (windowTop + window.innerHeight));
            const dropdownFitsAbove = (inputTop - dropdownHeight > windowTop);

            // by default, the dropdown will be below the input. If we want to position it above the
            // input, we add the dropup class.
            this._toggleClass(this.countryList, 'iti__country-list--dropup', (!dropdownFitsBelow && dropdownFitsAbove));

            // if dropdownContainer is enabled, calculate postion
            if (this.options.dropdownContainer) {
                // by default the dropdown will be directly over the input because it's not in the flow.
                // If we want to position it below, we need to add some extra top value.
                const extraTop = (!dropdownFitsBelow && dropdownFitsAbove) ? 0 : this.telInput.offsetHeight;

                // calculate placement
                this.dropdown.style.top = `${inputTop + extraTop}px`;
                this.dropdown.style.left = `${pos.left + document.body.scrollLeft}px`;

                // close menu on window scroll
                this._handleWindowScroll = () => this._closeDropdown();
                window.addEventListener('scroll', this._handleWindowScroll);
            }
        }
    }


    // iterate through parent nodes to find the closest list item
    _getClosestListItem(target) {
        let el = target;
        while (el && el !== this.countryList && !el.classList.contains('iti__country')) el = el.parentNode;
        // if we reached the countryList element, then return null
        return (el === this.countryList) ? null : el;
    }


    // we only bind dropdown listeners when the dropdown is open
    _bindDropdownListeners() {
        // when mouse over a list item, just highlight that one
        // we add the class "highlight", so if they hit "enter" we know which one to select
        this._handleMouseoverCountryList = (e) => {
            // handle event delegation, as we're listening for this event on the countryList
            const listItem = this._getClosestListItem(e.target);
            if (listItem) this._highlightListItem(listItem, false);
        };
        this.countryList.addEventListener('mouseover', this._handleMouseoverCountryList);

        // listen for country selection
        this._handleClickCountryList = (e) => {
            const listItem = this._getClosestListItem(e.target);
            if (listItem) this._selectListItem(listItem);
        };
        this.countryList.addEventListener('click', this._handleClickCountryList);

        // click off to close
        // (except when this initial opening click is bubbling up)
        // we cannot just stopPropagation as it may be needed to close another instance
        let isOpening = true;
        this._handleClickOffToClose = () => {
            if (!isOpening) this._closeDropdown();
            isOpening = false;
        };
        document.documentElement.addEventListener('click', this._handleClickOffToClose);

        // listen for up/down scrolling, enter to select, or letters to jump to country name.
        // use keydown as keypress doesn't fire for non-char keys and we want to catch if they
        // just hit down and hold it to scroll down (no keyup event).
        // listen on the document because that's where key events are triggered if no input has focus
        let query = '';
        let queryTimer = null;
        this._handleKeydownOnDropdown = (e) => {
            // prevent down key from scrolling the whole page,
            // and enter key from submitting a form etc
            e.preventDefault();

            // up and down to navigate
            if (e.key === 'ArrowUp' || e.key === 'Up' || e.key === 'ArrowDown' || e.key === 'Down') this._handleUpDownKey(e.key);
            // enter to select
            else if (e.key === 'Enter') this._handleEnterKey();
            // esc to close
            else if (e.key === 'Escape') this._closeDropdown();
            // alpha chars to perform search
            // regex allows one latin alpha char or space, based on https://stackoverflow.com/a/26900132/217866)
            else if (/^[a-zA-ZÀ-ÿа-яА-Я ]$/.test(e.key)) {
                // jump to countries that start with the query string
                if (queryTimer) clearTimeout(queryTimer);
                query += e.key.toLowerCase();
                this._searchForCountry(query);
                // if the timer hits 1 second, reset the query
                queryTimer = setTimeout(() => {
                    query = '';
                }, 1000);
            }
        };
        document.addEventListener('keydown', this._handleKeydownOnDropdown);
    }


    // highlight the next/prev item in the list (and ensure it is visible)
    _handleUpDownKey(key) {
        let next = (key === 'ArrowUp' || key === 'Up') ? this.highlightedItem.previousElementSibling : this.highlightedItem.nextElementSibling;
        if (next) {
            // skip the divider
            if (next.classList.contains('iti__divider')) {
                next = (key === 'ArrowUp' || key === 'Up') ? next.previousElementSibling : next.nextElementSibling;
            }
            this._highlightListItem(next, true);
        }
    }


    // select the currently highlighted item
    _handleEnterKey() {
        if (this.highlightedItem) this._selectListItem(this.highlightedItem);
    }


    // find the first list item whose name starts with the query string
    _searchForCountry(query) {
        for (let i = 0; i < this.countries.length; i++) {
            if (this._startsWith(this.countries[i].name, query)) {
                const listItem = this.countryList.querySelector(`#iti-${this.id}__item-${this.countries[i].iso2}`);
                // update highlighting and scroll
                this._highlightListItem(listItem, false);
                this._scrollTo(listItem, true);
                break;
            }
        }
    }


    // check if string a starts with string b
    _startsWith(a, b) {
        return (a.substr(0, b.length).toLowerCase() === b);
    }


    // update the input's value to the given val (format first if possible)
    // NOTE: this is called from _setInitialState, handleUtils and setNumber
    _updateValFromNumber(originalNumber) {
        let number = originalNumber;
        if (this.options.formatOnDisplay && window.intlTelInputUtils && this.selectedCountryData) {
            const useNational = (!this.options.separateDialCode
                && (this.options.nationalMode || number.charAt(0) !== '+'));
            const { NATIONAL, INTERNATIONAL } = intlTelInputUtils.numberFormat;
            const format = useNational ? NATIONAL : INTERNATIONAL;
            number = intlTelInputUtils.formatNumber(number, this.selectedCountryData.iso2, format);
        }

        number = this._beforeSetNumber(number);
        this.telInput.value = number;
    }


    // check if need to select a new flag based on the given number
    // Note: called from _setInitialState, keyup handler, setNumber
    _updateFlagFromNumber(originalNumber) {
        // if we're in nationalMode and we already have US/Canada selected, make sure the number starts
        // with a +1 so _getDialCode will be able to extract the area code
        // update: if we dont yet have selectedCountryData, but we're here (trying to update the flag
        // from the number), that means we're initialising the plugin with a number that already has a
        // dial code, so fine to ignore this bit
        let number = originalNumber;
        const selectedDialCode = this.selectedCountryData.dialCode;
        const isNanp = selectedDialCode === '1';
        if (number && this.options.nationalMode && isNanp && number.charAt(0) !== '+') {
            if (number.charAt(0) !== '1') number = `1${number}`;
            number = `+${number}`;
        }

        // update flag if user types area code for another country
        if (this.options.separateDialCode && selectedDialCode && number.charAt(0) !== '+') {
            number = `+${selectedDialCode}${number}`;
        }

        // try and extract valid dial code from input
        const dialCode = this._getDialCode(number, true);
        const numeric = this._getNumeric(number);
        let countryCode = null;
        if (dialCode) {
            const countryCodes = this.countryCodes[this._getNumeric(dialCode)];
            // check if the right country is already selected. this should be false if the number is
            // longer than the matched dial code because in this case we need to make sure that if
            // there are multiple country matches, that the first one is selected (note: we could
            // just check that here, but it requires the same loop that we already have later)
            const alreadySelected = (countryCodes.indexOf(this.selectedCountryData.iso2) !== -1)
                && (numeric.length <= dialCode.length - 1);
            const isRegionlessNanpNumber = (selectedDialCode === '1' && this._isRegionlessNanp(numeric));

            // only update the flag if:
            // A) NOT (we currently have a NANP flag selected, and the number is a regionlessNanp)
            // AND
            // B) the right country is not already selected
            if (!isRegionlessNanpNumber && !alreadySelected) {
                // if using onlyCountries option, countryCodes[0] may be empty, so we must find the first
                // non-empty index
                for (let j = 0; j < countryCodes.length; j++) {
                    if (countryCodes[j]) {
                        countryCode = countryCodes[j];
                        break;
                    }
                }
            }
        } else if (number.charAt(0) === '+' && numeric.length) {
            // invalid dial code, so empty
            // Note: use getNumeric here because the number has not been formatted yet, so could contain
            // bad chars
            countryCode = '';
        } else if (!number || number === '+') {
            // empty, or just a plus, so default
            countryCode = this.defaultCountry;
        }

        if (countryCode !== null) {
            return this._setFlag(countryCode);
        }
        return false;
    }


    // check if the given number is a regionless NANP number (expects the number to contain an
    // international dial code)
    _isRegionlessNanp(number) {
        const numeric = this._getNumeric(number);
        if (numeric.charAt(0) === '1') {
            const areaCode = numeric.substr(1, 3);
            return (regionlessNanpNumbers.indexOf(areaCode) !== -1);
        }
        return false;
    }


    // remove highlighting from other list items and highlight the given item
    _highlightListItem(listItem, shouldFocus) {
        const prevItem = this.highlightedItem;
        if (prevItem) prevItem.classList.remove('iti__highlight');
        this.highlightedItem = listItem;
        this.highlightedItem.classList.add('iti__highlight');

        if (shouldFocus) this.highlightedItem.focus();
    }


    // find the country data for the given country code
    // the ignoreOnlyCountriesOption is only used during init() while parsing the onlyCountries array
    _getCountryData(countryCode, ignoreOnlyCountriesOption, allowFail) {
        const countryList = (ignoreOnlyCountriesOption) ? allCountries : this.countries;
        for (let i = 0; i < countryList.length; i++) {
            if (countryList[i].iso2 === countryCode) {
                return countryList[i];
            }
        }
        if (allowFail) {
            return null;
        }
        throw new Error(`No country data for '${countryCode}'`);
    }


    // select the given flag, update the placeholder and the active list item
    // Note: called from _setInitialState, _updateFlagFromNumber, _selectListItem, setCountry
    _setFlag(countryCode) {
        const prevCountry = (this.selectedCountryData.iso2) ? this.selectedCountryData : {};

        // do this first as it will throw an error and stop if countryCode is invalid
        this.selectedCountryData = (countryCode) ? this._getCountryData(countryCode, false, false) : {};
        // update the defaultCountry - we only need the iso2 from now on, so just store that
        if (this.selectedCountryData.iso2) {
            this.defaultCountry = this.selectedCountryData.iso2;
        }

        this.selectedFlagInner.setAttribute('class', `iti__flag iti__${countryCode}`);
        // update the selected country's title attribute
        const title = (countryCode) ? `${this.selectedCountryData.name}: +${this.selectedCountryData.dialCode}` : 'Unknown';
        this.selectedFlag.setAttribute('title', title);

        if (this.options.separateDialCode) {
            const dialCode = (this.selectedCountryData.dialCode) ? `+${this.selectedCountryData.dialCode}` : '';
            this.selectedDialCode.innerHTML = dialCode;
            // offsetWidth is zero if input is in a hidden container during initialisation
            const selectedFlagWidth = this.selectedFlag.offsetWidth || this._getHiddenSelectedFlagWidth();

            // add 6px of padding after the grey selected-dial-code box, as this is what we use in the css
            this.telInput.style.paddingLeft = `${selectedFlagWidth + 6}px`;
        }

        // and the input's placeholder
        this._updatePlaceholder();

        // update the active list item
        if (this.options.allowDropdown) {
            const prevItem = this.activeItem;
            if (prevItem) {
                prevItem.classList.remove('iti__active');
                prevItem.setAttribute('aria-selected', 'false');
            }
            if (countryCode) {
                // check if there is a preferred item first, else fall back to standard
                const nextItem = this.countryList.querySelector(`#iti-${this.id}__item-${countryCode}-preferred`) || this.countryList.querySelector(`#iti-${this.id}__item-${countryCode}`);
                nextItem.setAttribute('aria-selected', 'true');
                nextItem.classList.add('iti__active');
                this.activeItem = nextItem;
                this.selectedFlag.setAttribute('aria-activedescendant', nextItem.getAttribute('id'));
            }
        }

        // return if the flag has changed or not
        return (prevCountry.iso2 !== countryCode);
    }


    // when the input is in a hidden container during initialisation, we must inject some markup
    // into the end of the DOM to calculate the correct offsetWidth
    _getHiddenSelectedFlagWidth() {
        // to get the right styling to apply, all we need is a shallow clone of the container,
        // and then to inject a deep clone of the selectedFlag element
        const containerClone = this.telInput.parentNode.cloneNode();
        containerClone.style.visibility = 'hidden';
        document.body.appendChild(containerClone);

        const flagsContainerClone = this.flagsContainer.cloneNode();
        containerClone.appendChild(flagsContainerClone);

        const selectedFlagClone = this.selectedFlag.cloneNode(true);
        flagsContainerClone.appendChild(selectedFlagClone);

        const width = selectedFlagClone.offsetWidth;
        containerClone.parentNode.removeChild(containerClone);
        return width;
    }


    // update the input placeholder to an example number from the currently selected country
    _updatePlaceholder() {
        const shouldSetPlaceholder = (this.options.autoPlaceholder === 'aggressive') || (!this.hadInitialPlaceholder && this.options.autoPlaceholder === 'polite');
        if (window.intlTelInputUtils && shouldSetPlaceholder) {
            const numberType = intlTelInputUtils.numberType[this.options.placeholderNumberType];
            let placeholder = (this.selectedCountryData.iso2) ? intlTelInputUtils.getExampleNumber(this.selectedCountryData.iso2, this.options.nationalMode, numberType) : '';

            placeholder = this._beforeSetNumber(placeholder);
            if (typeof this.options.customPlaceholder === 'function') {
                placeholder = this.options.customPlaceholder(placeholder, this.selectedCountryData);
            }
            this.telInput.setAttribute('placeholder', placeholder);
        }
    }


    // called when the user selects a list item from the dropdown
    _selectListItem(listItem) {
        // update selected flag and active list item
        const flagChanged = this._setFlag(listItem.getAttribute('data-country-code'));
        this._closeDropdown();

        this._updateDialCode(listItem.getAttribute('data-dial-code'), true);

        // focus the input
        this.telInput.focus();
        // put cursor at end - this fix is required for FF and IE11 (with nationalMode=false i.e. auto
        // inserting dial code), who try to put the cursor at the beginning the first time
        const len = this.telInput.value.length;
        this.telInput.setSelectionRange(len, len);

        if (flagChanged) {
            this._triggerCountryChange();
        }
    }


    // close the dropdown and unbind any listeners
    _closeDropdown() {
        this.countryList.classList.add('iti__hide');
        this.selectedFlag.setAttribute('aria-expanded', 'false');
        // update the arrow
        this.dropdownArrow.classList.remove('iti__arrow--up');

        // unbind key events
        document.removeEventListener('keydown', this._handleKeydownOnDropdown);
        document.documentElement.removeEventListener('click', this._handleClickOffToClose);
        this.countryList.removeEventListener('mouseover', this._handleMouseoverCountryList);
        this.countryList.removeEventListener('click', this._handleClickCountryList);

        // remove menu from container
        if (this.options.dropdownContainer) {
            if (!this.isMobile) window.removeEventListener('scroll', this._handleWindowScroll);
            if (this.dropdown.parentNode) this.dropdown.parentNode.removeChild(this.dropdown);
        }

        this._trigger('close:countrydropdown');
    }


    // check if an element is visible within it's container, else scroll until it is
    _scrollTo(element, middle) {
        const container = this.countryList;
        // windowTop from https://stackoverflow.com/a/14384091/217866
        const windowTop = window.pageYOffset || document.documentElement.scrollTop;
        const containerHeight = container.offsetHeight;
        const containerTop = container.getBoundingClientRect().top + windowTop;
        const containerBottom = containerTop + containerHeight;
        const elementHeight = element.offsetHeight;
        const elementTop = element.getBoundingClientRect().top + windowTop;
        const elementBottom = elementTop + elementHeight;
        let newScrollTop = elementTop - containerTop + container.scrollTop;
        const middleOffset = (containerHeight / 2) - (elementHeight / 2);

        if (elementTop < containerTop) {
            // scroll up
            if (middle) newScrollTop -= middleOffset;
            container.scrollTop = newScrollTop;
        } else if (elementBottom > containerBottom) {
            // scroll down
            if (middle) newScrollTop += middleOffset;
            const heightDifference = containerHeight - elementHeight;
            container.scrollTop = newScrollTop - heightDifference;
        }
    }


    // replace any existing dial code with the new one
    // Note: called from _selectListItem and setCountry
    _updateDialCode(newDialCodeBare, hasSelectedListItem) {
        const inputVal = this.telInput.value;
        // save having to pass this every time
        const newDialCode = `+${newDialCodeBare}`;

        let newNumber;
        if (inputVal.charAt(0) === '+') {
            // there's a plus so we're dealing with a replacement (doesn't matter if nationalMode or not)
            const prevDialCode = this._getDialCode(inputVal);
            if (prevDialCode) {
                // current number contains a valid dial code, so replace it
                newNumber = inputVal.replace(prevDialCode, newDialCode);
            } else {
                // current number contains an invalid dial code, so ditch it
                // (no way to determine where the invalid dial code ends and the rest of the number begins)
                newNumber = newDialCode;
            }
        } else if (this.options.nationalMode || this.options.separateDialCode) {
            // don't do anything
            return;
        } else {
            // nationalMode is disabled
            if (inputVal) {
                // there is an existing value with no dial code: prefix the new dial code
                newNumber = newDialCode + inputVal;
            } else if (hasSelectedListItem || !this.options.autoHideDialCode) {
                // no existing value and either they've just selected a list item, or autoHideDialCode is
                // disabled: insert new dial code
                newNumber = newDialCode;
            } else {
                return;
            }
        }

        this.telInput.value = newNumber;
    }


    // try and extract a valid international dial code from a full telephone number
    // Note: returns the raw string inc plus character and any whitespace/dots etc
    _getDialCode(number, includeAreaCode) {
        let dialCode = '';
        // only interested in international numbers (starting with a plus)
        if (number.charAt(0) === '+') {
            let numericChars = '';
            // iterate over chars
            for (let i = 0; i < number.length; i++) {
                const c = number.charAt(i);
                // if char is number (https://stackoverflow.com/a/8935649/217866)
                if (!isNaN(parseInt(c, 10))) {
                    numericChars += c;
                    // if current numericChars make a valid dial code
                    if (includeAreaCode) {
                        if (this.countryCodes[numericChars]) {
                            // store the actual raw string (useful for matching later)
                            dialCode = number.substr(0, i + 1);
                        }
                    } else {
                        if (this.dialCodes[numericChars]) {
                            dialCode = number.substr(0, i + 1);
                            // if we're just looking for a dial code, we can break as soon as we find one
                            break;
                        }
                    }
                    // stop searching as soon as we can - in this case when we hit max len
                    if (numericChars.length === this.countryCodeMaxLen) {
                        break;
                    }
                }
            }
        }
        return dialCode;
    }


    // get the input val, adding the dial code if separateDialCode is enabled
    _getFullNumber() {
        const val = this.telInput.value.trim();
        const { dialCode } = this.selectedCountryData;
        let prefix;
        const numericVal = this._getNumeric(val);

        if (this.options.separateDialCode && val.charAt(0) !== '+' && dialCode && numericVal) {
            // when using separateDialCode, it is visible so is effectively part of the typed number
            prefix = `+${dialCode}`;
        } else {
            prefix = '';
        }
        return prefix + val;
    }


    // remove the dial code if separateDialCode is enabled
    // also cap the length if the input has a maxlength attribute
    _beforeSetNumber(originalNumber) {
        let number = originalNumber;
        if (this.options.separateDialCode) {
            let dialCode = this._getDialCode(number);
            // if there is a valid dial code
            if (dialCode) {
                // in case _getDialCode returned an area code as well
                dialCode = `+${this.selectedCountryData.dialCode}`;
                // a lot of numbers will have a space separating the dial code and the main number, and
                // some NANP numbers will have a hyphen e.g. +1 684-733-1234 - in both cases we want to get
                // rid of it
                // NOTE: don't just trim all non-numerics as may want to preserve an open parenthesis etc
                const start = (number[dialCode.length] === ' ' || number[dialCode.length] === '-') ? dialCode.length + 1 : dialCode.length;
                number = number.substr(start);
            }
        }

        return this._cap(number);
    }


    // trigger the 'countrychange' event
    _triggerCountryChange() {
        this._trigger('countrychange');
    }


    /**************************
     *  SECRET PUBLIC METHODS
     **************************/


    // this is called when the geoip call returns
    handleAutoCountry() {
        if (this.options.initialCountry === 'auto') {
            // we must set this even if there is an initial val in the input: in case the initial val is
            // invalid and they delete it - they should see their auto country
            this.defaultCountry = window.intlTelInputGlobals.autoCountry;
            // if there's no initial value in the input, then update the flag
            if (!this.telInput.value) {
                this.setCountry(this.defaultCountry);
            }
            this.resolveAutoCountryPromise();
        }
    }


    // this is called when the utils request completes
    handleUtils() {
        // if the request was successful
        if (window.intlTelInputUtils) {
            // if there's an initial value in the input, then format it
            if (this.telInput.value) {
                this._updateValFromNumber(this.telInput.value);
            }
            this._updatePlaceholder();
        }
        this.resolveUtilsScriptPromise();
    }


    /********************
     *  PUBLIC METHODS
     ********************/


    // remove plugin
    destroy() {
        const { form } = this.telInput;

        if (this.options.allowDropdown) {
            // make sure the dropdown is closed (and unbind listeners)
            this._closeDropdown();
            this.selectedFlag.removeEventListener('click', this._handleClickSelectedFlag);
            this.flagsContainer.removeEventListener('keydown', this._handleFlagsContainerKeydown);
            // label click hack
            const label = this._getClosestLabel();
            if (label) label.removeEventListener('click', this._handleLabelClick);
        }

        // unbind hiddenInput listeners
        if (this.hiddenInput && form) form.removeEventListener('submit', this._handleHiddenInputSubmit);

        // unbind autoHideDialCode listeners
        if (this.options.autoHideDialCode) {
            if (form) form.removeEventListener('submit', this._handleSubmitOrBlurEvent);
            this.telInput.removeEventListener('blur', this._handleSubmitOrBlurEvent);
        }

        // unbind key events, and cut/paste events
        this.telInput.removeEventListener('keyup', this._handleKeyupEvent);
        this.telInput.removeEventListener('cut', this._handleClipboardEvent);
        this.telInput.removeEventListener('paste', this._handleClipboardEvent);

        // remove attribute of id instance: data-intl-tel-input-id
        this.telInput.removeAttribute('data-intl-tel-input-id');

        // remove markup (but leave the original input)
        const wrapper = this.telInput.parentNode;
        wrapper.parentNode.insertBefore(this.telInput, wrapper);
        wrapper.parentNode.removeChild(wrapper);

        delete window.intlTelInputGlobals.instances[this.id];
    }


    // get the extension from the current number
    getExtension() {
        if (window.intlTelInputUtils) {
            return intlTelInputUtils.getExtension(this._getFullNumber(), this.selectedCountryData.iso2);
        }
        return '';
    }


    // format the number to the given format
    getNumber(format) {
        if (window.intlTelInputUtils) {
            const { iso2 } = this.selectedCountryData;
            return intlTelInputUtils.formatNumber(this._getFullNumber(), iso2, format);
        }
        return '';
    }


    // get the type of the entered number e.g. landline/mobile
    getNumberType() {
        if (window.intlTelInputUtils) {
            return intlTelInputUtils.getNumberType(this._getFullNumber(), this.selectedCountryData.iso2);
        }
        return -99;
    }


    // get the country data for the currently selected flag
    getSelectedCountryData() {
        return this.selectedCountryData;
    }


    // get the validation error
    getValidationError() {
        if (window.intlTelInputUtils) {
            const { iso2 } = this.selectedCountryData;
            return intlTelInputUtils.getValidationError(this._getFullNumber(), iso2);
        }
        return -99;
    }


    // validate the input val - assumes the global function isValidNumber (from utilsScript)
    isValidNumber() {
        const val = this._getFullNumber().trim();
        const countryCode = (this.options.nationalMode) ? this.selectedCountryData.iso2 : '';
        return (window.intlTelInputUtils ? intlTelInputUtils.isValidNumber(val, countryCode) : null);
    }


    // update the selected flag, and update the input val accordingly
    setCountry(originalCountryCode) {
        const countryCode = originalCountryCode.toLowerCase();
        // check if already selected
        if (!this.selectedFlagInner.classList.contains(`iti__${countryCode}`)) {
            this._setFlag(countryCode);
            this._updateDialCode(this.selectedCountryData.dialCode, false);
            this._triggerCountryChange();
        }
    }


    // set the input value and update the flag
    setNumber(number) {
        // we must update the flag first, which updates this.selectedCountryData, which is used for
        // formatting the number before displaying it
        const flagChanged = this._updateFlagFromNumber(number);
        this._updateValFromNumber(number);
        if (flagChanged) {
            this._triggerCountryChange();
        }
    }

    // set the placeholder number typ
    setPlaceholderNumberType(type) {
        this.options.placeholderNumberType = type;
        this._updatePlaceholder();
    }
}


/********************
 *  STATIC METHODS
 ********************/


// get the country data object
intlTelInputGlobals.getCountryData = () => allCountries;


// inject a <script> element to load utils.js
const injectScript = (path, handleSuccess, handleFailure) => {
    // inject a new script element into the page
    const script = document.createElement('script');
    script.onload = () => {
        forEachInstance('handleUtils');
        if (handleSuccess) handleSuccess();
    };
    script.onerror = () => {
        forEachInstance('rejectUtilsScriptPromise');
        if (handleFailure) handleFailure();
    };
    script.className = 'iti-load-utils';
    script.async = true;
    script.src = path;
    document.body.appendChild(script);
};


// load the utils script
intlTelInputGlobals.loadUtils = (path) => {
    // 2 options:
    // 1) not already started loading (start)
    // 2) already started loading (do nothing - just wait for the onload callback to fire, which will
    // trigger handleUtils on all instances, invoking their resolveUtilsScriptPromise functions)
    if (!window.intlTelInputUtils && !window.intlTelInputGlobals.startedLoadingUtilsScript) {
        // only do this once
        window.intlTelInputGlobals.startedLoadingUtilsScript = true;

        // if we have promises, then return a promise
        if (typeof Promise !== 'undefined') {
            return new Promise((resolve, reject) => injectScript(path, resolve, reject));
        }
        injectScript(path);
    }
    return null;
};


// default options
intlTelInputGlobals.defaults = defaults;

// version
intlTelInputGlobals.version = '<%= version %>';