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我有2向下滾動菜單像如何重置多個向下滾動選擇的菜單
<%= f.label :term_id, "TERM *"%>
<br>
<%= f.collection_select :term_id, Term.order(:id), :id, :name, include_blank: true %>
<br>
<%= f.label :lesson_id, "LESSON *" %>
<br>
<%= f.grouped_collection_select :lesson_id, Term.order(:name), :lessons, :name, :id, :name, include_blank: "Ders Seçiniz" %>
和JavaScript代碼就是這樣
jQuery ->
lessons = $('#demand_lesson_id').html()
$('#demand_term_id').change ->
term = $('#demand_term_id :selected').text()
options = $(lessons).filter("optgroup[label='#{term}']").html()
if options
$('#demand_lesson_id').html(options)
else
$('#demand_lesson_id').empty()
我需要當我點擊Reset按鈕復位。但除了課程組收集,所有表單元素都清理乾淨。
我該如何管理它?