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$ is not defined lightgallery

For some reason my lightgallery is not working. I added it the same way I always do and all javascript files are included after Jquery.
I get this message in the console:
Uncaught TypeError: $ is not a function
at product-1.html:433
(anonymous) # product-1.html:433
Which points to:
<script type="text/javascript">
$(document).ready(function($) {
$("#lightgallery").lightGallery();
});
</script>
All files are correctly loaded, I checked in the network tab.
What could be the problem and how can I fix it? Maybe there is a conflict somewhere? Can I wrap it in a function to make it work?
My js files:

in the head
<link href="https://cdn.rawgit.com/sachinchoolur/lightgallery.js/master/dist/css/lightgallery.css" rel="stylesheet">
your html content
<div id="lightgallery">
<a href="img/img1.jpg">
<img src="img/thumb1.jpg" />
</a>
<a href="img/img2.jpg">
<img src="img/thumb2.jpg" />
</a>
</div>
in the body include light gallery js files after jquery
<script src="https://cdn.rawgit.com/sachinchoolur/lightgallery.js/master/dist/js/lightgallery.js"></script>
<script src="https://cdn.rawgit.com/sachinchoolur/lg-pager.js/master/dist/lg-pager.js"></script>
<script src="https://cdn.rawgit.com/sachinchoolur/lg-autoplay.js/master/dist/lg-autoplay.js"></script>
<script src="https://cdn.rawgit.com/sachinchoolur/lg-fullscreen.js/master/dist/lg-fullscreen.js"></script>
<script src="https://cdn.rawgit.com/sachinchoolur/lg-zoom.js/master/dist/lg-zoom.js"></script>
<script src="https://cdn.rawgit.com/sachinchoolur/lg-hash.js/master/dist/lg-hash.js"></script>
<script src="https://cdn.rawgit.com/sachinchoolur/lg-share.js/master/dist/lg-share.js"></script>
<script>
lightGallery(document.getElementById('lightgallery'));
</script>
This really works for me.

Clearing browser cache may help sometimes. Or narrow down your problem by loading one by one starting with jquery.

This solves the problem :
<script>
lightGallery(document.getElementById('lightgallery'));
</script>

1.Check your maps api js link like https://developers.google.com/maps/api/js this is correct or not
2.Press Ctrl+Shift+Del button at a same time and clear caches and cookies

Uncaught TypeError: undefined is not a function while using jQuery UI

I haven't used jQuery before, and I wanted to use DateTimePicker plugin on my web page.
I downloaded the plugin file and placed them in the same directory as the HTML files.
I directly applied the code at How to use it? in http://xdsoft.net/jqplugins/datetimepicker/.
It threw the following error.
Uncaught TypeError: undefined is not a function pixelcrawler:61 (anonymous function)
My code follows.
<script type='text/javascript' src="//ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="file:///jquery.datetimepicker.css"/ >
<script src="file:///jquery.datetimepicker.js"></script>
<script>
jQuery('#datetimepicker').datetimepicker();
</script>
<div class="container">
<div class="text-center">
<div class="page-header">
<h1>${conf['title']} <small>${conf['description']}</small></h1>
</div>
</div>
<div class="text">
<input id="datetimepicker" type="text" >
.
.
.
.
.
I could not figure out what the problem was. I have tried many other seemingly likely options, but it just did not work either.
(The ${} tags are used for the Mako template language. I am using Cherrypy.)
UPDATE:
I figured out the source of the problem.
It's from jQuery('#datetimepicker').datetimepicker();.
When tested, the datetimepicker() function was undefined. Maybe the way I imported the library was wrong?

jQuery(document).ready(function(){
jQuery('#datetimepicker').datepicker();
})
I don't know your file-structure. I never include local files like this as I use relative URLs from the start rather than having to change everytime I'm ready to use the code, but it's likely one of the files isn't being loaded in. I've included the standard datepicker below using Google CDN's jQuery UI. Does your console log any resources not found?
I think your jQuery is loaded OK, because it's not telling you jQuery is not defined so it's one of your files.
BTW, PHP gets the home URL:
$home="http://" . $_SERVER['HTTP_HOST'].'/';
Demo code datepicker, jQuery UI:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css" />
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery('#datetimepicker').datepicker();
})
</script>
<input id="datetimepicker" type="text">

This is about the HTML parse mechanism.
The HTML parser will parse the HTML content from top to bottom. In your script logic,
jQuery('#datetimepicker')
will return an empty instance because the element has not loaded yet.
You can use
$(function(){ your code here });
or
$(document).ready(function(){ your code here });
to parse HTML element firstly, and then do your own script logics.

use jQuery.noConflict()
var j = jQuery.noConflict();
j(document).ready(function(){
j('#datetimepicker').datepicker();
})

For my situation, it was a naming conflict problem. Adding $J solves it.
//Old code:
function () {
var extractionDialog;
extractionDialog = $j("#extractWindowDialog").dialog({
autoOpen: false,
appendTo: "form",
height: "100",
width: "250",
modal: true
});
$("extractBomInfoBtn").button().on("click", function () {
extractionDialog.dialog("open");
}
And the following is new code.
$j(function () {
var extractionDialog;
extractionDialog = $j("#extractWindowDialog").dialog({
autoOpen: false,
appendTo: "form",
height: "100",
width: "250",
modal: true
});
$j("extractBomInfoBtn").button().on("click", function () {
extractionDialog.dialog("open");
});
});
Hope it could help someone.

Usually when you get this problem, it happens because a script is trying to reference an element that doesn't exist yet while the page is loading.
As richie mentioned: "The HTML parser will parse the HTML content from top to bottom..."
So you can add your JavaScript references to the bottom of the HTML file. This will not only improve performance; it will also ensure that all elements referenced in your script files have already been loaded by the HTML parser.
So you could have something like this:
<html>
<head>
<!-- Style sheet references and CSS definitions -->
</head>
<body>
<!-- HTML markup and other page content -->
<!-- JavaScript references. You could include jQuery here as well and do all your scripting here. -->
</body>
</html>

You may see if you are not loading jQuery twice somehow. Especially after your plugin JavaScript file loaded.
I has the same error and found that one of my external PHP files was loading jQuery again.

The issue because of not loading jquery ui library.
https://code.jquery.com/ui/1.11.4/jquery-ui.js - CDN source file
Call above path in your file.

And if you have this problem in slider or slideshow you must use jquery.easing.1.3:
<script src="http://gsgd.co.uk/sandbox/jquery/easing/jquery.easing.1.3.js"></script>

I had trouble getting selectable to work with ASP.NET. It turns out I wasn't properly including everything, but this gentleman made it foolproof: Three steps to use jQuery UI in ASP.NET MVC 5.

I don't think jQuery itself includes datetimepicker. You must use jQuery UI instead (src="jquery.ui").

Blogger: Uncaught ReferenceError $ is not defined

I am following the tutorial here: http://tympanus.net/codrops/2013/04/30/text-opening-sequence-with-css-animations/
I'm trying to add this to a Blogger XML template. The script doesn't work, I keep getting an error in my Chrome Console saying it's not defined, but as far as I can tell it is. Here is what I'm using:
<div class="intro-container">
<div class="os-phrases" id="os-phrases">
<h2>Hello...</h2>
<h2>I'm Draven Xarcell Vestatt</h2>
<h2>I Provide</h2>
<h2>Organzied Creative Services</h2>
<h2>Through</h2>
<h2>Xarcell Studios</h2>
</div>
</div>
<script type='text/javascript'>
$(document).ready(function() {
$("#os-phrases > h2").lettering('words').children("span").lettering().children("span").lettering();
});
</script>
My jQuery call is at the end of the document:
<!-- Let's add jQuery -->
<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js'/>
and the javascript file lettering.js is included within my XML template file(meaning no external js). I have tried linking directly to the file in the tutorial webpage, but gives the same results.
BTW, I have the script working in a blank html document, but it doesn't work in a Blogger template. I even got it working in jsFiddle just fine: http://jsfiddle.net/BULLr/

jQuery should be included before it is used - so it should be added before your script

Fancybox won't work

Can't seem to get Fancybox to work - it just links to the 1st pic. I get the error: uncaught typeerror object # an object has no method 'fancybox'.
HTML
<a class="fancybox" data-thumbnail="http://staging.timeoutchicago.com/sites/timeoutchicago.com/files/imagecache/timeout_slideshow_player_thumbnail/P1010923.JPG" href="http://staging.timeoutchicago.com/sites/timeoutchicago.com/files/imagecache/timeout_492x330/P1010923.JPG"><img alt="" src="http://staging.timeoutchicago.com/sites/timeoutchicago.com/files/toclogo.jpg"></a>
<br />
<a class="fancybox" data-thumbnail="http://fancyapps.com/fancybox/demo/2_s.jpg" href="http://fancyapps.com/fancybox/demo/2_b.jpg"></a>​
Javascript
<script type="text/javascript">
$(document).ready(function() {
$(".fancybox").attr('rel', 'gallery').fancybox({
helpers: {
thumbs: {
width: 40,
height: 40,
source: function(current) {
return $(current.element).data('thumbnail');
}
}
}
});
});
</script>
Header
<!-- Add jQuery library -->
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<!-- Add fancyBox -->
<link rel="stylesheet" href="/fancybox/source/jquery.fancybox.css?v=2.1.3" type="text/css" media="screen" />
<script type="text/javascript" src="/fancybox/source/jquery.fancybox.pack.js?v=2.1.3"></script>
It does seem to be pulling in the external files according to the Source in Chrome's Developer Tools.
Thx

Hmmm. It looks like jquery is loaded twice. Once with
<!-- Add jQuery library -->
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
and the other (harder to find)
http://staging.timeoutchicago.com/sites/timeoutchicago.com/files/advagg_js/js_13ec2e29dba08b369ccfdde54d836ec0_8.js
It looks like you're using drupal and with a bit of googling, it sounds like it injects a version of jquery for you (jQuery JavaScript Library v1.3.2)
The reason that error is occuring is the conflict between the two libraries. Try following this update
http://drupal.org/project/jquery_update

You're pulling in the two versions of jQuery.
When you execute jQuery(".fancybox").jquery from the console, you get 1.3.2. Undoubtedly, this is not compatible with fancybox.
jQuery 1.8.2 is loaded via the Google CDN with your explicit script tag request.
jQuery 1.3.2 is loaded as part of http://staging.timeoutchicago.com/sites/timeoutchicago.com/files/advagg_js/js_13ec2e29dba08b369ccfdde54d836ec0_8.js, which comes from Drupal injecting this library for its own purposes.
For future reference, I was able to locate this file by using the Chrome Developer Tools, sorting by file size (largest first) and then looking at the JS files... found it pretty quickly after that.

I was having this same problem and I resolved it by changing the double quotes in the line:
$(".fancybox").fancybox();
To single quotes:
$('.fancybox').fancybox();
Sort of a 'gotcha' since the fancyBox site has double quotes.

if anything does not work:
parent.window.document.getElementById("fancybox-wrap").style.display = 'none';
This hiding fancybox.

Uncaught ReferenceError $ is not defined

I'm very new to JavaScript (just started a few hours ago and trying to get a script working). I went through a few tutorials on W3 and the 'hello world' code works when I paste it directly into my HTML but I'm having a problem with a script (I've had problems with other scripts as well but I am not sure what I'm doing wrong).
I have this code that I want to test in my HTML, I copied the HTML in and it looks the same then I made a file in my static folder called edit.js and copied the JavaScript into it (exactly as shown). It didn't work no errors on the page but when I click it nothing happens. I tried to paste a W3 'hello world' code in and that worked but this script does not.
I tried to inspect the code in Chrome and that's where I see the above error (under the resources tab). I can open the js file using Chrome which makes me think the js file is accessible and pointing correctly but I'm not sure how to get it working. I'm using Jinja2 as my template engine to render the HTML and in my header I have:
<script language="JavaScript" type="text/javascript" src="static/edit.js"></script>
and in my main template (the one that gets rendered on all pages) I have:
<script language="JavaScript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
edit.js:
(even putting it within the script tag directly on the page I want to use it on doesn't work)
$('#editvalue').click(function(e){$('#storedvalue').hide();$('#altervalue').show();});
$('#savevalue').click(function(e){
var showNew = $('#changevalue').val();
$('#altervalue').hide();
$('#storedvalue').show();
$('#storedvalue span').text(showNew);
});​
HTML:
(it's embedded in a larger page)
<head>
<script language="JavaScript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
<script language="JavaScript" type="text/javascript" src="static/edit.js"></script>
</head>
... my html code..
<div id="wrapper">
<div id="container">
<div id="storedvalue"><span>Hello</span> [edit]</div>
<div id="altervalue" style="display:none;"><input type="text" name="changevalue" id="changevalue" value="Hello"> [save]</div>
</div>
</div>
I have never been able to successfully run a JavaScript that wasn't on W3 yet. I get the same problem with other scripts even though I see people online saying they work fine for them. Do I need to do anything extra to make this work?
My two questions are:
What am I doing wrong?
Because Javascript seems to just not work when there's a problem, is there a way to get errors or information on what's actually wrong?
I read Uncaught ReferenceError: $ is not defined? and have been trying to figure this out for the last hour and can't see my problem.

First you need to place the jQuery script tag first.
Second, you need to do one of the following things:
Put your code within this function:
$(document).ready(function(){/*CODE HERE*/});
Or like this:
$(function(){
/*CODE HERE*/
});
The DOM needs to be ready before you can use it. Placing your code within anonymous functions that are executed on the ready event of the DOM is how you can do this.
Edit:
$(function(){
$('#editvalue').click(function(e){$('#storedvalue').hide();$('#altervalue').show();});
$('#savevalue').click(function(e){
var showNew = $('#changevalue').val();
$('#altervalue').hide();
$('#storedvalue').show();
$('#storedvalue span').text(showNew);
});​
});

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
Script tag for jQuery should come before your custom javascript.
Follow by edit.js
<script type="text/javascript" src="static/edit.js"></script>

Try removing the language attribute..sometimes work for me. It's obsolete now .. i think

You need to include jquery before you can use it.