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JavaScript

Posted by Carlos Caro
Carlos Caro
9,528 Points

It doesn't work after a small change

From the class, we have: $("button").click(function () { $(this).prev().show(); $(this).remove(); });

I understand this as it makes sense and it works. However, if we just switch the order like this:

$("button").click(function () { $(this).remove(); $(this).prev().show(); });

Then it doesn't work.

Could someone help me with this?

Kody Bentley
Kody Bentley
4,411 Points

Hello,

As far as I know, it is because JavaScript is calling $(this).remove() first before it can call $(this).prev() and $(this).show().

Basically how can you preview and show what you have already removed by calling $(this).remove().

Let me know if this helps, I'm sure someone else can explain this far better than myself.

Happy coding.

1 Answer

Steven Parker
Steven Parker
243,656 Points
Steven Parker
Steven Parker
243,656 Points

Kody is essentially correct. The original code uses the triggered element to identify and reveal the previous element, then remove itself.

If you remove it first, you cannot use it as the reference to identify and reveal the previous element. But, you could reverse the order of operations if you save the previous element first:

$("button").click(function() {
  var prev = $(this).prev();
  $(this).remove();
  prev.show();
});

Of course, the end result will appear the same, so in this case it's no advantage to change the order.