We Keep Coding

jSignature is not a function

I'm trying to use jSignature in my website, but it keeps showing me this error:
Uncaught TypeError: $(...).jSignature is not a function
My code is:
<div id="signature"></div>
$("#signature").jSignature();
I have Jquery 1.11.1:
<script src="https://code.jquery.com/jquery-1.11.1.js"></script>
The Jquery is called before the JS of the function.
I have also tried to call Jquery Mobile, calls like $('#signature').jSignature({'UndoButton':false,color:"#000000",lineWidth:5});, etc but it never works.
Can anyone help ?

Well, i fixed the problem.
The problem was: I had the Jquery 1.12.4 in my plugins file. It would work normal in any page, but with the jSignature it made the JS throw an error.
I removed the Jquery from the Plugins ( but keeped the CDN one ) and now it works fine.
I already found many questions about this but never an answer.
Hope this helps anyone out there.
Many Thanks

i use jQuery 3.4, had the same issue. Im not quite sure where the problem came from but it was the phantom.
First i added all recommended libs to my project and accessed the element as used to:
<script src="https://code.jquery.com/jquery-3.3.1.min.js" crossorigin="anonymous"></script>
<script src="/jSignature.min.noconflict.js"></script>
...
$(`#id`).jSignature();
I received the same jSignature is not a function
Afterwards i assumed the problem might be in jQuery version compatability, so added few lines:
<script src="https://code.jquery.com/jquery-3.3.1.min.js" crossorigin="anonymous"></script>
<script src="/jSignature.min.noconflict.js"></script>
<script src="https://code.jquery.com/jquery-1.12.4.min.js"
integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ="
crossorigin="anonymous"></script>
<script>
var jq_1_12 = $.noConflict(true)
</script>
...
jq_1_12(`#id`).jSignature();
it was keeping throw the same error jSignature is not a function.
Finally
I removed the last changes and jquery 1.12 import. The problem solved it-self, have no idea what have happened. But the plugin works now without any explicable reason

Boostrap lightbox not working as expected

I'm trying to get a functional lightbox to work on my page using code from 'bootply.com/' but it does't seem to work. It works as a link, but not as a lightbox. I get an error relating to the Javascript which states '$ is not defined', but I can't seem to locate the issue. I'm simply replicating the code, so not sure what I'm missing!
<script type="text/JavaScript">
$('.thumbnail').click(function(){
$('.modal-body').empty();
var title = $(this).parent('a').attr("title");
$('.modal-title').html(title);
$($(this).parents('div').html()).appendTo('.modal-body');
$('#myModal').modal({show:true});
});
http://www.bootply.com/71401
Any help is appreciated.

you have to include jQuery.
if you have jQuery lib then
<script src="jquery-1.11.2.min.js"></script>
or
use jQuery CDN
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>

You are missing the jQuery library..
Include this in the top of your HTML before you attempt to use the $
<script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
Alternatively you can download the jQuery library and reference it yourself.
This should resolve the issue.

DatePicker Does Nothing When Clicked

I'm trying the simplest example of getting datepicker to work, and I just can't seem to get it. There is almost nothing in my fiddle.
The top of my web page has this:
<script src="~/Scripts/jquery-1.6.2.js" type="text/javascript" />
<script src="~/Scripts/jquery-ui-1.8.11.js" type="text/javascript" />
<script>
$(function(){
$("#datepicker").datepicker();
});​​​
</script>
Note: I tried putting the first two script lines in _Layout.cshtml, but I got an error (don't recall the error at the moment). That's why I just put it all on the one page.
And down a bit, in that same page, is this:
<td><input type="text" id="datepicker"></td>
When I click on the input control, nothings happens. However, when I click on the control in the fiddle, it works. What am I missing?
Also, you'll notice I'm using jquery 1.6.2 and jquery-ui 1.8.11. That's different than the fiddle example because fiddle didn't provide those versions as options. I'd be surprised if the version was the difference.

Script tag must have both opening and closing items. You cannot shorthand close them.
Instead of this
<script src="~/Scripts/jquery-1.6.2.js" type="text/javascript" />
do this
<script src="~/Scripts/jquery-1.6.2.js" type="text/javascript"></script>

I'm hoping this won't be the final answer, but I finally got the datepicker to display. After much trial and error, and research, I seem to have a jquery conflict, but I don't know why. Someone suggested something called non-conflict mode. So I changed my datepicker code to this:
<script type="text/javascript">
(function ($) {
$(document).ready(function () {
$("#endTime").datepicker();
});
})(jQuery);
</script>
And it worked. I'm not sure why, but it's finally at least working. If anyone can provide more insight, or a better answer, I'd gladly pick it.
The above example is explained in this answer: Basically, what I did was define a function that takes a parameter (the $) and then execute that function with jQuery as the parameter.
What I still don't understand though, is why this code won't work:
<script type="text/javascript">
jQuery(document).ready(function () {
jQuery("#endTime").datepicker();
});
</script>
If there was a conflict because of the $, and I replaced $ with jQuery, shouldn't it work?

The datepicker is pretty much straight forward why dont you use something like firebug in mozilla to see if it is throwing some error also date picker internally uses the Jquery theme roller so please download and add the jquery "css/custom-Theme/jquery-custom.css" css.

$('body').layout is not a function

I'm using the jQuery UI Layout plugin and I keep getting this error in Firebug: $('body').layout is not a function. I also get the same error in IE8 and below.
Obviously, it's being caused by the line where I initiate the layout UI in my scripts file:
$('body').layout({ *options here* });
Is there a way to prevent this error from showing? I'm pretty sure I need the BODY selector for this particular plugin to run.
** SOLUTION **
As the helpful answers say below, I had this line: $('body').layout({ *options here* }); BEFORE I included my jQuery and jQuery UI Layout Plugin files. Once I put the body.layout after those two inclusions, the error went away.

You seem to either
1) have not included the plugin properly (script tag missing/typo in the url, included it before loading jquery itself, whatever else could go wrong)
 or
2) calling $("body").layout too early - wrap it with $(document).ready(function() { });
it should be
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery.layout.js"></script>
...
<script type="text/javascript">
$(document).ready(function() {
$("body").layout() // will work now
});
</script>

Make sure you're including the lines:
<SCRIPT type="text/javascript" src="/path/to/jquery-latest.js"></SCRIPT>
<SCRIPT type="text/javascript" src="/path/to/jquery.layout-latest.js"></SCRIPT>
Prior to the code you placed in your question. Otherwise, layout will have been undefined before use.

How do you implement the jQuery noConflict() method correctly?

I can't get the noConflict() method to work properly. I've been searching online for hours and can't seem to get a solid answer. Here's what I have in my header...
<script type="text/javascript" src="js/mootools.js"></script>
<script type="text/javascript" src="js/slimbox.js"></script>
<script type="text/javascript" src="js/jquery.js"></script><!-- jQuery script -->
<script type="text/javascript" src="js/page_scroll.js"></script><!-- JavaScript -->
<script src="js/jquery.easing.1.3.js" type="text/javascript"></script><!-- jQuery easing plug-in -->
<script type="text/javascript">
var $j = jQuery.noConflict();
// Use jQuery via $j(...)
$j(document).ready(function(){
$j("div").hide();
});
// Use Mootools with $(...), etc.
$('someid').hide();
</script>
There's no other jQuery or JavaScript within my HTML (just what I have externally), so "placing anything that uses the $ variable in the noConlict method" is not an option.
Essentially what I'm trying to do is have slimbox and easing page scroll (for my navigation) to work together. The problem is of course one works when the other is removed and vice versa. Also, when I use the noConflict() method I get slimbox to work and not pagescroll, but when I remove the noConflict() method I get pagescroll to work and not slimbox. So apperently noConflict is doing something, I just don't know what that is or how to go about it.
If anyone can help me out, I'd appreciate it. Thanks.

when using other js libs that leverage the $ alias,
I have found reliable results by using
$.noConflict();
jQuery(document).ready(function($) {
// your jQuery code here i.e.
// jQuery('some-selector-expression').somefunction();
});
// prototype or mootools code that uses the $ alias works fine here

So are you saying it does not work when you declare $j? You can define your own alternate names (e.g. jq, $J, awesomeQuery - anything you want). Try calling it something w/o the $

Wrap it in an anonymous function:
(function($){
$(document).ready(function() {
// function here...
});
})(jQuery);
Seeing the exact code might help.