使用jQuery更改第一个跨度的文本

Question

I've tried a number of things but I cannot get my code to work. I want to change the text of the span containing a number in this code:

<li class="top">
  <div class="sec">
            <span>123</span>
            <span class="inner">Lorem</span>
    </div>
</li>

My JavaScript/JQuery:

(function($) {
  $(document).ready(function() {
    $('li.top .sec').find('span').eq(0).text('cccc');
  });
})(jQuery);

I've been able to write code that changes both spans, but not the one.

Answer 1

 (function($) { $(document).ready(function() { $('li.top .sec').find('.inner').prev().text('cccc'); }); })(jQuery); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <li class="top"> <div class="sec"> <span>123</span> <span class="inner">Lorem</span> </div> </li> 

the .prev() method searches for the predecessor of each of these elements in the DOM tree and constructs a new jQuery object from the matching elements.

The method optionally accepts a selector expression of the same type that can be passed to the $() function. If the selector is supplied, the preceding element will be filtered by testing whether it match the selector.

Excerpt taken from the JQuery prev documentation

Answer 2

Your code body appears to work to largely work.

I just tried inserting this line into the doc as follows:

 $('li.top .sec').find('span').eq(0).text('cccc');

See http://jsbin.com/leyasiwexu/edit?html,js,output

So, perhaps there is something else that is causing the issue?

 console.log($('li.top .sec').find('span').eq(0).text()); $('li.top .sec').find('span').eq(0).text('cccc') console.log('changed to: ' + $('li.top .sec').find('span').eq(0).text()); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <li class="top"> <div class="sec"> <span>123</span> <span class="inner">Lorem</span> </div> </li> 

Answer 3

您可以尝试以下方法：

$('li.top .sec').find('.inner').prev().text('cccc');

Answer 4

I haven't checked, HTML Specifications , but I don't think its appropriate to nest a div inside li . I know you can work your way around presentation irregularities with css, but this might not be permissible with jQuery. Just as I said, I haven't verified. If you have to nest items inside li , use inline elements. div is block