[英]How to remove previous element using javascript
<script type="text/javascript">
$(document).ready(function(){
$('.linkplus').next().remove();
});
</script>
这有效。 但我不明白为什么
<script type="text/javascript">
$(document).ready(function(){
$('.linkplus').prev().remove();
});
</script>
或者
<script type="text/javascript">
$(document).ready(function(){
$('.linkplus').prev().remove();
});
</script>
不工作。 有没有办法使用javascript删除前一个元素?
上一个元素是:
<%= link_to '+', food_plans_path(abc: date),:method=> :post,:style=>"color:black;visibility:visible;float:right;font-weight:700;font-size:17px;",:class=>"linkplus"%>
我只想在linkplus
之前linkx
这是 HTML:
<div class="col-md-9" style="padding-top:7px;">
<%= week_calendar number_of_weeks: 4, events: @food_plans do |date, food_plans| %>
<%= date.day %>
<%= link_to '+', food_plans_path(abc: date),:method=> :post,:style=>"color:black;visibility:visible;float:right;font-weight:700;font-size:17px;",:class=>"linkplus"%>
<% food_plans.each do |food_plan| %>
<%if food_plan!=nil%>
<%= link_to 'x', food_plan,:style=>"color:black;visibility:visible;float:right;font-weight:700;font-size:14px;",:class=>"linkx", method: :delete, data: { confirm: 'Are you sure?' } %>
<%end%>
<div >
<!-- Displays proper collection select-->
<%if food_plan.meal==nil%>
<%=collection_select(:post, :food_plan_id, Meal.all, :name, :name, {prompt: '---'}, {:id=>"fsel", :onchange=>"window.location='#{meal_select_path(food_plan.id)}?meal=' + this.value"})%>
<%else%>
<%=collection_select(:post, :food_plan_id, Meal.all, :name, :name, {selected: food_plan.meal}, {:id=>"fsel", :onchange=>"window.location='#{meal_select_path(food_plan.id)}?meal=' + this.value"})%>
<%end%>
</div>
<%end%>
<% end %>
</div>
在检查元素时,ff 显示:
<a style="color:black;visibility:visible;float:right;font-weight:700;font-size:17px;" class="linkplus" rel="nofollow" data-method="post" href="/food_plans?abc=2016-05-09">+</a>
<a style="color:black;visibility:visible;float:right;font-weight:700;font-size:14px;" class="linkx" data-confirm="Are you sure?" rel="nofollow" data-method="delete" href="/food_plans/7">x</a>
我只想在
linkplus
之前linkx
您显示的代码删除了linkplus
元素之前或之后的元素,而不是这些元素本身。
这是如何做你在上面引用的声明中提出的要求:
$('.linkx').prev('.linkplus').remove();
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