filer jquery

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<ul>
<li><strong>list</strong> item 1 -
one strong tag</li>
<li><strong>list</strong> item <strong>2</strong> -
two <span>strong tags</span></li>
<li>list item 3</li>
<li>list item 4</li>
<li>list item 5</li>
<li>list item 6</li>
</ul>

We can select the list items, then filter them based on their contents:

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$('li').filter(function(index) {
return $('strong', this).length == 1;
}).css('background-color', 'red');
原文地址:https://www.cnblogs.com/yanjunwu/p/3015855.html