I know that is simple question but I need an advice from experienced people.

I have 3 input type file like:

<input type=file name=1-files />

<input type=file name=2-files />

<input type=file name=3-files />

I select all inputs (on my page I have also other inputs type file) which name ends with -files ( I wrote in Google Chrome console):

$(input[type='file'][name*='-files']).length

Ok. I select a file using 1-files input. After that, I run the following code in Google Chrome console:

$(input[type='file'][name*='-files']:empty).length

I expect to be 2 but appears 3.

Can you tell me why ?

I want to get all elements of input type file which values are empty. I used in short way the selector :empty but it seems not working properly.

Of course, I could use

var empty_count = 0;

$.each($(input[type='file'][name*='-files']), function(k, v){

  if($(this).val() === '')

     empty_count++;

});

But I want the shortest way to do this without $.each.

Thank you