How to catch the admin tab switching event in Magento 2

November 2, 2015 - Magento 2

Magento 2 Development

Since Magento 2 utilizes the standard jQuery UI Tabs Widget, you should catch the tabsactivate event to catch the admin tab switching:

var $tabs = $('#page_tabs');
if ($tabs.length) {
    /** @type HTMLDivElement */
    var tabContent = $textarea.closest('.ui-tabs-panel').get(0);
    if (tabContent) {
        $tabs.bind('tabsactivate', function(event, data) {
            if (data.newPanel.get(0) === tabContent) {
                // your code here
            }
        });
    }
}