选择ID为另一个元素中属性的元素

Question

How do I select an element whose ID is given in an attribute of another element?

<div id="_News" class="link active" data-wife="News">News</div>

I want to grab the element with the ID given in data-wife . I've tried something like

$("'#" + $(this).attr("data-wife") + "'").show();

but it looks totally wrong to me (and does not work, of course..).

Answer 1

You're doubling up your quotes. You would end up with a selector that was interpreted like this:

$("'#News'")

Try this instead:

$("#" + $(this).attr("data-wife")).show();

As a side note, it's simpler and preferable to use data() to access data- attributes:

$("#" + $(this).data("wife")).show();

Answer 2

To get the value of "data-" attributes, you can use .data() :

$('#' + $(this).data('wife')).show();

Note that you leave off the "data-" prefix. In your code you introduced an extra layer of quotes, which is incorrect. The library just wants a string, not a string with a quoted string in it.

Answer 3

demo

$('#_News').click(function(){ 
  $('#'+this.dataset.wife).show();  
});

Answer 4

只是语法更改

$("#" + $(this).attr("data-wife")).show();