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var wp_accordion_element = $('.gutena-accordion-block .wp-block-gutena-accordion-panel');
var wp_content = $('.wp-block-gutena-accordion-panel-content');
wp_accordion_element.on('click', function(){
$(this).siblings().removeClass('active'); //remove all class
$(this).addClass('active'); //addclass to clicked
$(this).siblings().find(wp_content).css({'max-height': ''}); //css change
$(this).find(wp_content).css({'max-height': 'set'}); //css add to clicked
})