jQuery-选择有孩子的父母

Question

I have a Div which may contain an INPUT with a class of "datepicker"

<div class="rereg-input180">
     ... some layers
         <input class="one two datepicker three">
               ....

I need to apply a Style="clear" to the top div. However I don't want to if that div doesn't contain a datepicker child.

How do I select it?

Answer 1

You can do this -

$div = $('.rereg-input180');

if($div.find('.datepicker').length){
  // apply style
}

Answer 2

您也可以这样做：

$('.datepicker').closest('.rereg-input180').addClass('clear');

Answer 3

You can use .has() http://api.jquery.com/has/ assuming you want the clear both, if it's a clear class, the you can just .addClass() instead of .css()

$('.rereg-input180').has('.datepicker').css('clear', 'both');

if you want to be more specific you can do

$('.rereg-input180').has('input.datepicker').css('clear', 'both');

Answer 4

您可以使用以下选择器：

$('div.rereg-input180:has(:text.datepicker)').css('clear', 'both')

Answer 5

您可以使用： jQuery的 .parent()

$(".datepicker").parent().css("clear","both");