javascript - Swapping list elements with jQuery - Stack Overflow

admin管理员组

文章数量:1323383

I have a list:

<li>item one<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item two<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item three<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item four<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item five<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>

Each one has an up and down arrow on. In my jquery I have:

$(".upArrow").click(function() {

});

$(".downArrow").click(function() {

});

How can I get it so that when a user clicks up arrow it swaps the li with the one above, and when they click down it swaps with the li below (if one exists).

I have a list:

<li>item one<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item two<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item three<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item four<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>
<li>item five<img src="/assets/img/site/up_arrow.png" class="upArrow"/><img src="/assets/img/site/down_arrow.png" class="downArrow"/</li>

Each one has an up and down arrow on. In my jquery I have:

$(".upArrow").click(function() {

});

$(".downArrow").click(function() {

});

How can I get it so that when a user clicks up arrow it swaps the li with the one above, and when they click down it swaps with the li below (if one exists).

• javascript
• jquery

Share Improve this question Follow edited Sep 26, 2015 at 18:17 gsamaras 73.4k5050 gold badges208208 silver badges326326 bronze badges asked Apr 25, 2012 at 15:52 panthropanthro 24.1k7070 gold badges203203 silver badges349349 bronze badges 0

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 6

jsFiddle( http://jsfiddle/A9j3E/6/ )

$(".upArrow").click(function() {
    $(this).parent().insertBefore( $(this).parent().prev() );
});

$(".downArrow").click(function() {
    $(this).parent().insertAfter( $(this).parent().next() );
});​

You could get a reference to the list item, and insert it before/after its sibling.

$(".upArrow").on("click", function(){
  var li = $(this).closest("li");
  li.insertBefore( li.prev() );
});

Also, be sure to properly close your images. Your down arrow images were all malformed.

try something like this

$(".upArrow").click(function() {
  var thisItem = $(this).closest('li');
  var prevItem = thisItem.prev();

  if(prevItem.length != 0) {
    thisItem.before(prevItem);
  }
});

$(".downArrow").click(function() {
  var thisItem = $(this).closest('li');
  var nextItem = thisItem.next();

  if(nextItem.length != 0) {
    thisItem.after(nextItem);
  }
});

本文标签： javascriptSwapping list elements with jQueryStack Overflow