在链接选择上使用jQuery添加/删除类

Question

I'm trying to write a function in jQuery that will add a class to a selected link (which opens a page in an iframe) then remove that class when another link is selected. I received some help from another member here before for a similar type of thing, but that involved radio buttons and tables.

I tried playing with it for awhile, but jQuery is still pretty new to me so I don't know a whole lot about it.

Basically, I have about 3-4 groups of links contained in <div id="CollapsiblePanelContent"> ... </div> and I would like to add a style to the <a> tag within this container that the user selected.

Any help would be greatly appreciated. Thank you.

<div id="CollapsiblePanelContent">  
  <a href="page1.asp" onclick="return handlelink(this)">Link1</a>
  <a href="page2.asp" onclick="return handlelink(this)">Link2</a>
  <a href="page3.asp" onclick="return handlelink(this)">Link3</a>
  <a href="page4.asp" onclick="return handlelink(this)">Link4</a>
</div>

<script type='text/javascript'>
  $(function() {
    $('div').click(function(event) {
      $(this).closest('.CollapsiblePanelContent').addClass('selected').parent().siblings().each(function() {
        $(this).find('.CollapsiblePanelContent').removeClass('selected');
      });
    });
  });
</script>

Answer 1

$('#CollapsiblePanelContent a').on('click', function(e){
  e.preventDefault(); // prevent page reload, you may remove it if don't need
  $(this).addClass('selected').siblings().removeClass('selected');
});

As CollapsiblePanelContent is id so correct selector will be #CollapsiblePanelContent not .CollapsiblePanelContent .

But if you use CollapsiblePanelContent for multiple div s then instead of id it should be class with selector .CollapsiblePanelContent . Because multiple elements can have same id .

Answer 2

You can try :

function handlelink(this)
{
$(this).siblings().removeClass('selected');
$(this).addClass('selected');
//do the rest with the click
}

Answer 3

Based on the HTML you've provided the following should work:

$(function() {
    $('.CollapsiblePanelContent a').click(function() {
        $(this).addClass('selected').siblings().removeClass('selected');
    });
});

That binds the click event handler to any <a> elements inside <div class="CollapsiblePanelContent"> , which adds the selected class to the clicked link, and removes the same class from all of its siblings.