newsupernova/vendor/magento/module-backend/view/adminhtml/templates/store/switcher.phtml

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

// @codingStandardsIgnoreFile

/* @var $block \Magento\Backend\Block\Store\Switcher */
?>
<?php if ($websites = $block->getWebsites()): ?>

<div class="store-switcher store-view">
    <span class="store-switcher-label"><?= /* @escapeNotVerified */ __('Store View:') ?></span>
    <div class="actions dropdown closable">
        <input type="hidden" name="store_switcher" id="store_switcher"
               data-role="store-view-id" data-param="<?= /* @escapeNotVerified */ $block->getStoreVarName() ?>"
               value="<?= $block->escapeHtml($block->getStoreId()) ?>"
               onchange="switchScope(this);"<?= /* @escapeNotVerified */ $block->getUiId() ?> />
        <input type="hidden" name="store_group_switcher" id="store_group_switcher"
               data-role="store-group-id" data-param="<?= /* @escapeNotVerified */ $block->getStoreGroupVarName() ?>"
               value="<?= $block->escapeHtml($block->getStoreGroupId()) ?>"
               onchange="switchScope(this);"<?= /* @escapeNotVerified */ $block->getUiId() ?> />
        <input type="hidden" name="website_switcher" id="website_switcher"
               data-role="website-id" data-param="<?= /* @escapeNotVerified */ $block->getWebsiteVarName() ?>"
               value="<?= $block->escapeHtml($block->getWebsiteId()) ?>"
               onchange="switchScope(this);"<?= /* @escapeNotVerified */ $block->getUiId() ?> />
        <button
            type="button"
            class="admin__action-dropdown"
            data-mage-init='{"dropdown":{}}'
            data-toggle="dropdown"
            aria-haspopup="true"
            id="store-change-button">
            <?= /* @escapeNotVerified */ $block->getCurrentSelectionName() ?>
        </button>
        <ul class="dropdown-menu" data-role="stores-list">
            <?php if ($block->hasDefaultOption()): ?>
                <li class="store-switcher-all <?php if ( ! ($block->getDefaultSelectionName() != $block->getCurrentSelectionName())) {
                    echo "disabled";
                } ?> <?php if ( ! $block->hasScopeSelected()) {
                    ?> current<?php
                } ?>">
                    <?php if ($block->getDefaultSelectionName() != $block->getCurrentSelectionName()) {
                        ?>
                        <a data-role="store-view-id" data-value="" href="#">
                            <?= /* @escapeNotVerified */ $block->getDefaultSelectionName() ?>
                        </a>
                    <?php
                    } else {
                        ?>
                        <span><?= /* @escapeNotVerified */ $block->getDefaultSelectionName() ?></span>
                    <?php
                    } ?>
                </li>
            <?php endif; ?>
            <?php foreach ($websites as $website): ?>
                <?php $showWebsite = false; ?>
                <?php foreach ($website->getGroups() as $group): ?>
                    <?php $showGroup = false; ?>
                    <?php foreach ($block->getStores($group) as $store): ?>
                        <?php if ($showWebsite == false): ?>
                            <?php $showWebsite = true; ?>
                            <li class="store-switcher-website <?php if ( ! ($block->isWebsiteSwitchEnabled() && ! $block->isWebsiteSelected($website))) {
                                echo "disabled";
                            } ?> <?php if ($block->isWebsiteSelected($website)) {
                                ?> current<?php
                            } ?>">
                                <?php if ($block->isWebsiteSwitchEnabled() && ! $block->isWebsiteSelected($website)) {
                                    ?>
                                    <a data-role="website-id" data-value="<?= $block->escapeHtml($website->getId()) ?>" href="#">
                                        <?= $block->escapeHtml($website->getName()) ?>
                                    </a>
                                <?php
                                } else {
                                    ?>
                                    <span><?= $block->escapeHtml($website->getName()) ?></span>
                                <?php
                                } ?>
                            </li>
                        <?php endif; ?>
                        <?php if ($showGroup == false): ?>
                            <?php $showGroup = true; ?>
                            <li class="store-switcher-store <?php if ( ! ($block->isStoreGroupSwitchEnabled() && ! $block->isStoreGroupSelected($group))) {
                                echo "disabled";
                            } ?> <?php if ($block->isStoreGroupSelected($group)) {
                                ?> current<?php
                            } ?>">
                                <?php if ($block->isStoreGroupSwitchEnabled() && ! $block->isStoreGroupSelected($group)) {
                                    ?>
                                    <a data-role="store-group-id" data-value="<?= $block->escapeHtml($group->getId()) ?>" href="#">
                                        <?= $block->escapeHtml($group->getName()) ?>
                                    </a>
                                <?php
                                } else {
                                    ?>
                                    <span><?= $block->escapeHtml($group->getName()) ?></span>
                                <?php
                                } ?>
                            </li>
                        <?php endif; ?>
                        <li class="store-switcher-store-view <?php if ( ! ($block->isStoreSwitchEnabled() && ! $block->isStoreSelected($store))) {
                            echo "disabled";
                        } ?> <?php if ($block->isStoreSelected($store)) {
                            ?> current<?php
                        } ?>">
                            <?php if ($block->isStoreSwitchEnabled() && ! $block->isStoreSelected($store)) {
                                ?>
                                <a data-role="store-view-id" data-value="<?= $block->escapeHtml($store->getId()) ?>" href="#">
                                    <?= $block->escapeHtml($store->getName()) ?>
                                </a>
                            <?php
                            } else {
                                ?>
                                <span><?= $block->escapeHtml($store->getName()) ?></span>
                            <?php
                            } ?>
                        </li>
                    <?php endforeach; ?>
                <?php endforeach; ?>
            <?php endforeach; ?>
            <?php if ($block->getShowManageStoresLink() && $block->getAuthorization()->isAllowed('Magento_Backend::store')): ?>
                <li class="dropdown-toolbar">
                    <a href="<?= /* @escapeNotVerified */ $block->getUrl('*/system_store') ?>"><?= /* @escapeNotVerified */ __('Stores Configuration') ?></a>
                </li>
            <?php endif; ?>
        </ul>
    </div>
    <?= $block->getHintHtml() ?>
</div>

<script>
require([
    'jquery',
    'Magento_Ui/js/modal/confirm'
], function(jQuery, confirm){

    (function($) {
        var $storesList = $('[data-role=stores-list]');
        $storesList.on('click', '[data-value]', function(event) {
            var val = $(event.target).data('value');
            var role = $(event.target).data('role');
            var switcher = $('[data-role='+role+']');

            event.preventDefault();

            if (!switcher.val() || val != switcher.val()) {
                switcher.val(val).trigger('change'); // Set the value & trigger event
            }
        });
    })(jQuery);

    var scopeSwitcherHandler;

    function switchScope(obj) {
        var switcher = jQuery(obj);
        var scopeId = switcher.val();
        var scopeParams = '';
        if (scopeId) {
            scopeParams = switcher.data('param') + '/' + scopeId + '/';
        }

        if (obj.switchParams) {
            scopeParams += obj.switchParams;
        }

        if ((typeof scopeSwitcherHandler) != 'undefined') {
            var switcherParams = {
                scopeId: scopeId,
                scopeParams: scopeParams,
                useConfirm: <?= (int)$block->getUseConfirm() ?>
            };
            scopeSwitcherHandler(switcherParams);
        } else {

            <?php if ($block->getUseConfirm()): ?>

            confirm({
                content:  "<?= /* @escapeNotVerified */ __('Please confirm scope switching. All data that hasn\'t been saved will be lost.') ?>",
                actions: {
                    confirm: function() {
                        reload();
                    },
                    cancel: function() {
                        obj.value = '<?= $block->escapeHtml($block->getStoreId()) ?>';
                    }
                }
            });

            <?php else: ?>
                reload();
            <?php endif; ?>
        }

        function reload() {
            <?php if (!$block->isUsingIframe()): ?>
            var url = '<?= /* @escapeNotVerified */ $block->getSwitchUrl() ?>' + scopeParams;
            setLocation(url);
            <?php else: ?>
            jQuery('#preview_selected_store').val(scopeId);
            jQuery('#preview_form').submit();

            jQuery('.store-switcher .dropdown-menu li a').each(function() {
                var $this = jQuery(this);

                if ($this.data('role') === 'store-view-id' && $this.data('value') == scopeId) {
                    jQuery('#store-change-button').html($this.text());
                }
            });

            jQuery('#store-change-button').click();
            <?php endif; ?>
        }
    }

    window.scopeSwitcherHandler = scopeSwitcherHandler;
    window.switchScope = switchScope;

});
</script>
<?php endif; ?>