我正在嘗試這樣做：單擊 a>以顯示列表和 a V，再次單擊以關閉列表并更改V回>. 這是我的代碼function toggle() { var toggleClosed = $(this).find(".toggle-closed"); var toggleOpened = $(this).find(".toggle-opened"); if (!$(toggleClosed).is(":visible")) { toggleClosed.removeClass('toggle-opened').addClass('toggle-closed'); toggleOpened.removeClass('toggle-closed').addClass('toggle-opened'); } else { $(toggleClosed).addClass('toggle-closed').removeClass('toggle-opened'); $(toggleOpened).addClass('toggle-opened').removeClass('toggle-closed'); }}.form-row-filter { background-color: grey;}.toggle-opened { cursor: pointer; display: block;}.toggle-closed { cursor: pointer; display: none;}.material-icons { margin-right: -4px; margin-left: 4px; vertical-align: middle;}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><div class="form-row-filter" style="display:inline-block"> <ul> <div class="material-icons toggle-opened" onclick="toggle()">></div> <div class="material-icons toggle-closed" onclick="toggle()">V</div> <li class="toggle-closed"> company a </li> <li class="toggle-closed"> company b </li> </ul></div>這是一個代碼筆：https://codepen.io/thinkvantagedu/pen/MNORvZ?editors=1100為什么不添加或刪除該類？
為什么從 div onclick 中添加和刪除類不起作用？
陪伴而非守候
2021-09-04 15:05:56