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var coll = document.querySelectorAll('.collapsible');
var coll = document.querySelectorAll('.collapsible'); var i; console.log( coll);
for (i = 0; i < coll.length; i++) { coll[i].addEventListener("click", function() { this.classList.toggle("active");
console.log(this);
var content = this.nextElementSibling;
console.log('this.nextElementSibling: ' , this.nextElementSibling )
if (content.style.maxHeight){ content.style.maxHeight = null; console.log('展開變閉合: '+ content.style.maxHeight) } else { content.style.maxHeight = content.scrollHeight + "px"; console.log('閉合變展開: '+ content.style.maxHeight) } }); }
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