$(document).on('click', 'div.dv-headLine', function (evt) { const $evt = $(evt.currentTarget); const expendYn = $evt.attr('aria-expanded'); // 'true' or 'false' as string console.log("expendYn ===> ", expendYn); if (expendYn === "true") { // collapse๊ฐ ์ด๋ ธ์ ๋ $evt.find('span.collapsed-reveal').show(); // or .css('display', 'inline') } else { // collapse..