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Question

jQuery: Count Number of Inputs with a Specific Value

Answer 1

+4 A:

This example demonstrates that this works:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"&gt;&lt;/script&gt;
<script type="text/javascript">
$(function() {
  $("#btn").click(function() {
    alert($(":input[value='1']").length);
  });
});
</script>
</head>
<body>
<input type="text">
<input type="text">
<input type="text">
<input type="button" id="btn" value="How many?">
</body>
</html>

Alternatively you can just loop:

var matches = 0;
$(":input.class").each(function(i, val) {
  if ($(this).val() == '1') {
    matches++;
  }
});

cletus 2009-11-10 00:04:24

I thought JQuery may have a shorthand one liner, however, it works. Thank you!

ticallian 2009-11-10 00:18:10

Answer 2

A:

Sounds like you might be needing to do the count in an event handler, possibly a handler for the keyup event (or maybe keypress)

$('.class').keyup(function(e) {
    alert($('.class[value=1]').length);
});

Russ Cam 2009-11-10 00:05:33

Answer 3

+1 A:

You need to iterate with $.each() if you want current val() values:

k=0;
$('.class').each(function(i, e) {
  if ($(e).val() == "1") k++;
});

Scott Evernden 2009-11-10 00:07:01

Answer 4

A:

$(':input.class').filter(function() {
    return $(this).val() == '1'
})

meder 2009-11-10 00:09:33

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jQuery: Count Number of Inputs with a Specific Value

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