Solved

jQuery: Test if all select values are empty

Posted on 2013-06-26
1
462 Views
Last Modified: 2013-06-26
How can I test if all select values are empty?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Demo</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script type="text/javascript">

$(window).unload(function () {
 $(':input').val('');
});

$(document).ready(function() {
 $('input[type=text]').val('');
 $('#f').change(function() {
  if ($('#f select[value!=""]').is('select')  ) {
   alert( 'The value of all selects are empty' );
  }
  else alert( 'At least one select has a value that is not empty' );
 });
});

</script>

</head>
<body>

<form id="f" action="/" method="get">

<select name="s1">
<option value="">---</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>

<select name="s2">
<option value="">---</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>

<select name="s3">
<option value="">---</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>

</form>

</body>
</html>

Open in new window

0
Comment
Question by:hankknight
1 Comment
 
LVL 42

Accepted Solution

by:
David S. earned 500 total points
ID: 39279682
Try this:
$(document).ready(function() {
 $('input[type=text]').val('');
 $('#f').change(function() {
  var selected = $('#f select option:selected');
  if (selected.length === selected.filter('[value=""]').length ) {
   alert( 'The value of all selects are empty' );
  }
  else alert( 'At least one select has a value that is not empty' );
 });
});

Open in new window

0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In my daily work (mainly using ASP.net), I need to write a lot of JavaScript code. One of the most repetitive tasks I do are the jQuery Ajax calls. You know: (CODE) I don't know if for you it's the same, but for me is soooo tedious to write the …
Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question