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I'm trying to use the slider() function of jQuery UI, and keep getting the following error in the console:
TypeError: undefined is not a function (evaluating jQuery('#slider').slider())
I've definitely linked to the jQuery UI javascript and CSS files correctly - when I view the page source, they're all there. Why am I still getting this error?
If it's of any use, I'm using Rails and also some Bootstrap stuff. Here's the javascript code:
<script type="text/javascript">
$(document).ready(function(){
$('#slider').slider();
});
</script>
Thanks
Here's the <head>:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="">
<link rel="shortcut icon" href="../../docs-assets/ico/favicon.png">
<link href="/assets/jquery.ui.core.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.theme.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.accordion.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.menu.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.autocomplete.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.button.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.datepicker.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.resizable.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.dialog.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.progressbar.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.selectable.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.slider.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.spinner.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.tabs.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.tooltip.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.base.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery.ui.all.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/application.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/bootstrap-theme.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/bootstrap-theme.min.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/bootstrap.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/bootstrap.min.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/companies.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/jquery-ui.min.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/scaffolds.css?body=1" media="screen" rel="stylesheet" />
<link href="/assets/bootstrap.css?body=1" media="screen" rel="stylesheet" />
<script src="/assets/jquery.js?body=1"></script>
<script src="/assets/jquery_ujs.js?body=1"></script>
<script src="/assets/bootstrap.js?body=1"></script>
<script src="/assets/bootstrap.min.js?body=1"></script>
<script src="/assets/companies.js?body=1"></script>
<script src="/assets/jquery-1.11.0.min.js?body=1"></script>
<script src="/assets/jquery-ui.min.js?body=1"></script>
<script src="/assets/application.js?body=1"></script>
<title>New Company - OE Fort by Oxford Entrepreneurs</title>
<meta content="authenticity_token" name="csrf-param" />
<meta content="FcOEJfo8vcCzR+Dq+5zOVSvm7Npfo+R+FoXrEPpV3js=" name="csrf-token" />
<!-- Bootstrap core CSS -->
<link href="../../../app/assets/stylesheets/bootstrap.css" rel="stylesheet">
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js" type="text/javascript"></script>
<link href="../../../app/assets/stylesheets/jquery-ui.min.css" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="../../jumbotron.css" rel="stylesheet">
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css" />
<!-- Just for debugging purposes. Don't actually copy this line! -->
<!--[if lt IE 9]><script src="../../docs-assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
<!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
<![endif]-->
<link href='http://fonts.googleapis.com/css?family=Oswald:400,700' rel='stylesheet' type='text/css'>
<link href='http://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,400,600,300' rel='stylesheet' type='text/css'>
<script type="text/javascript">
jQuery(document).ready(function(){
$('#slider').slider();
});
</script>
</head>
536
on if not a function" jQuery error occurs for 2 main reasons: Loading an old version of the jQuery library that doesn't support the on function. Loading a library that overrides the value of the dollar sign $ variable.
A variable that has not been assigned a value is of type undefined . A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns undefined if a value was not returned .
jQuery Is Loaded After Your Code The reason that you're seeing the undefined error message that we discussed earlier is because jQuery is literally not defined within the context of your code. That is, your code has no idea that jQuery even exists because jQuery is loaded after your code. Luckily, this is a simple fix.
I would surmise the error would be caused by loading this function before JQuery is loaded yet (hence why you're seeing the undefined error -- JQuery is undefined)
Can you detail the way you're loading the code? Can you post your <head> tag?
The possible causes could be:
$("#slider") is not a valid element
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