jQuery：使用每个嵌套元素迭代

Question

i have this basic html structure:

<div class=a>
  <div class=m></div>
  <div class=m></div>
</div>
<div class=b>
  <div class=m></div>
  <div class=m></div>
</div>

now i want to iterate over all m's but also would like to know if i am in a or b. using basic jquery syntax each i fail to do find this out.

$('.m').each(function(index) {
    // how do i know if this m is part of a or b ?
});

Answer 1

$(this).parent().hasClass("a")或$(this).parent().hasClass("b")

Answer 2

if($(this).parent().hasClass('a'))

同样的b，它应该工作。

Answer 3

If you care, then I'd separate the selectors like this:

$('.a .m').each(function(index) {
    // now I'm on .a items
});

$('.b .m').each(function(index) {
    // now I'm on .b items
});

Answer 4

$('.m').each(function(index) {
    this.parentNode.getAttribute( "class" );
});

Answer 5

例如，检查父级是.a

if($(this).parent().is('.a'))

Answer 6

You could use the .closest method:

var $this = $(this);
if ($this.closest("a").length === 1) {
    alert("I'm in an a div");
}
else {
    alert("I'm in a b div");
}   

Answer 7

You can check the class of the parent element inside your function to identify if you are in 'a' or 'b'

$('.m').each(function() {
     var parentClass = $(this).parent().attr('class');
});

So, the parentClass var should have a value of either 'a' or 'b'