jQuery:目标类的前3个目标

Question

我有一个如下的元素列表：

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var locationSlug = "paris";
$('div a.country-item.' + locationSlug).slice(0, 3).show();

.country-item { display: none; }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div class="parent">
  <a class="country-item paris london">Text1</a>
  <a class="country-item tokyo london">Text2</a>
  <a class="country-item paris moscow">Text3</a>
  <a class="country-item berlin london">Text4</a>
  <a class="country-item paris madrid">Text5</a>
  <a class="country-item barcelona edinburgh">Text6</a>
  <a class="country-item nice dublin">Text7</a>
  <a class="country-item paris stockholm">Text8</a>
</div>

​

我尝试用.paris类显示元素的前3个实例，所以不是前3个子元素，因为列表会很长。我尝试了下面的选择器

$('div a.country-item.' + locationSlug).slice(0, 3).show();

但是这种切片方法似乎根本不起作用。

任何关于这方面的建议都将不胜感激！

Answer 1

使用jQuery :lt() selector

 var locationSlug="paris";
  $('div.parent a.'+locationSlug+':lt(3)').show();

http://api.jquery.com/lt-selector/

​

$(document).ready(function() {
  $("div > a").hide();
  var locationSlug="paris";
  $('div.parent a.'+locationSlug+':lt(3)').show();
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="parent">
    <a class="country-item paris london">paris1</a>
    <a class="country-item tokyo london">Text</a>
    <a class="country-item paris moscow">paris2</a>
    <a class="country-item berlin london">Text</a>
    <a class="country-item paris madrid">paris3</a>
    <a class="country-item barcelona edinburgh">Text</a>
    <a class="country-item nice dublin">Text</a>
    <a class="country-item paris stockholm">paris4</a>
</div>

​