jquery 找到所有具有 class 的元素并返回被点击元素的计数 position

Question

I am not looking for $(this).index() as an FYI. So, what I have are two <ul> tags with <li> tags within them. I want to know which <ul> was clicked and which <li> was clicked. For example something like ul 0 and li 3. So if there are 10 <ul> tags on the page I only want to look at the ones with the list class for clicks.

jQuery Example that will not work for what I want:

 $('ul').click(function(event) { alert($(this).index()); });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <ul class="list"> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> </ul> <hr /> <ul class="list"> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> </ul>

The wanted outcome of the clicked element: UL # and LI #. Like UL0 LI3, UL1 LI3, etc...

JSFiddle: http://jsfiddle.net/cg3a8d6n/

Answer 1

You could use click event on li element and then get its index and also the index of its parent which is ul . You can also specify selector inside the index method to consider only specific elements that match the selector.

 $('ul.list li').click(function(event) { const li = $(this).index(); const ul = $(this).parent().index('ul.list'); console.log(`ul: ${ul} li: ${li}`) });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <ul class="list"> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> </ul> <hr /> <ul></ul> <ul></ul> <ul class="list"> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> <li>Test</li> </ul>