I have in javascipt/pack a home.js file
var hello = "hello"
window.hello2 = "hello"
But, after loading the view associated (home.html.erb), in the javascript console of my navigator for these variables I get Uncaught ReferenceError: hello is not defined or undefined
var hello = "Hello" - When you type > hello in console, this will not work because of a concept called Closure in Javascript. I found this article helpful.
window.hello2 = "Hello" -> You are assigning a global variable. When you type > window.hello2 in console it will give the output, but just > hello2 won't work and it gives ReferenceError.
window.hello2 is available to all your JS code, it is global.
However, it's not recommended to use global variables, use vars in respective functions.
Also, you didn't mention that how you're using your pack/home.js file.
If you include <%= javascript_pack_tag 'home' %> in app/views/layouts/application.html.erb, then your JS code will run in every controller/view(not just in Home controller.)
If you include <%= javascript_pack_tag 'home' %> in app/views/home/index.html.erb, then your JS code will run in only in home#index action - but it triggers refresh.
I'm getting unexpected End of expression error when I pass nodejs data to to ng-init. I'm confident I'm doing it right however I'm getting the error message above
I call ng-init like so:
<body id="myPage" ng-app="myApp" ng-controller="arrCtrl" ng-init="items = <%- JSON.stringify(myitems) %>">
and the error is here
Unexpected end of expression: items = [{
Thus when I run
{{items}}
It'll display as is.
I also went ahead and declared my module in my script tag just in case like so
<script>
var app = angular.module('myApp', []);
app.controller('arrCtrl', function(){
console.log("Controller loaded");
});
</script>
I looked everywhere and no one seemed to have solved this issue.
I have my angular clientside javascript broken up such that a controller/filter/service/etc. is contained in its own file. Because I want to minify, I have to use inline dependency injection, so a controller might look like:
["$scope", "$aService",
function ($scope, $aService) {
// Do something
}
]
The difficulty is that JSLint is reporting errors which I take to mean that it is attempting to interpret the above code as JSON, which it is not -- it is a fragment of javascript. How can I get around this / tell jslint to treat this file as javascript instead?
The specific JSLint Errors:
Expected a JSON value. (E003)
Expected ']' and instead saw 'function'. (W116)
Expected '(end)' and instead saw '('. (W116)
I am new to typescript and am trying to get a simple class going. I have the below code and when I run, I keep getting a syntax error. I tried even an empty class and nothing.
I am using ASP.NET MVC5 (note, if I just have a function in the code, it works fine).
Inside Site.ts I have:
class Facebook {
constructor() { }
open() {
window.open("http://www.facebook.com");
}
}
var social = new Facebook();
I am calling the code by a link
open
I don't even get to click, right away, when loading I get
JavaScript critical error at line 1, column 1 in http://localhost:20870/Scripts/site.ts\n\nSCRIPT1002: Syntax error
It seems to work in the playground:
Click here to see my workout
Any ideas?
Looks like the browser is trying to execute the TypeScript and not the JavaScript. Double check your <script> tags (or any other thing you are using to load the code e.g. requirejs)
I had the same problem, when using a TypeScript tutorial on www.typescriptlang.org.
I realized that my script tag was referencing the TypeScript file and not the JS file:
<script src="greeter.ts"></script>
instead of:
<script src="greeter.js"></script>
I'm building a normal webpage which requires me to load about five CSS files and ten Javascript files.
When loading them separately in the HTML page, my webpage loads fine.
Now for production, I concatenated all the Javascript into a single file, in the order needed, and all the CSS into another file. But when I try to run the web page with the concatenated files it throws an error saying:
Uncaught TypeError: undefined is not a function
On the line where jquery.min.js is being loaded in the concatenated Javascript file.
What can I do to mitigate this? I want to concatenate all files and minify them for production. Please help.
EDIT: I merged the Javascript and CSS in the order they were when they were being loaded individually and were working fine.
Assuming this problem still has not be resolved, a lot of individual files don't end their code with a semicolon. Most jQuery scripts end with (jQuery) and you need to have (jQuery);.
As separate files the script will load just fine but as one individual file you need the semicolons.
You might have to re-check the order in which you are merging the files,
it should be something like:
jquery.min.js
jquery-ui.js
any third party plugins you loading
your custom JS
This solution worked for me
;(function($){
// your code
})(jQuery);
Move your code inside the closure and use $ instead of jQuery
I found the above solution in https://magento.stackexchange.com/questions/33348/uncaught-typeerror-undefined-is-not-a-function-when-using-a-jquery-plugin-in-ma
after seraching too much
I got the same error from having two references to different versions of jQuery.
In my master page:
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
And also on the page:
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"> </script>
I had this problem recently with the jQuery Validation plug-in, using Squishit, also getting the js error:
"undefined is not a function"
I fixed it by changing the reference to the unminified jquery.validate.js file, rather than jquery.validate.min.js.
#MvcHtmlString.Create(
#SquishIt.Framework.Bundle.JavaScript()
.Add("~/Scripts/Libraries/jquery-1.8.2.min.js")
.Add("~/Scripts/Libraries/jquery-ui-1.9.1.custom.min.js")
.Add("~/Scripts/Libraries/jquery.unobtrusive-ajax.min.js")
.Add("~/Scripts/Libraries/jquery.validate.js")
.Add("~/Scripts/Libraries/jquery.validate.unobtrusive.js")
... more files
I think that the minified version of certain files, when further compressed using Squishit, for example, might in some cases not deal with missing semi-colons and the like, as #Dustin suggests, so you might have to experiment with which files you can doubly compress, and which you just leave to Squishit or whatever you're bundling with.
For those out there who still couldn't fix this, I did so by changing my 'this' to '$(this)' when using jQuery.
E.G:
$('.icon').click(function() {
this.fadeOut();
});
Fixed:
$('.icon').click(function() {
$(this).fadeOut();
});
I've run into the very same issue, when mistakenly named variable with the very same name, as function.
So this:
isLive = isLive(data);
failed, generating OP's mentioned error message.
Fix to this was as simple as changing above line to:
isItALive = isLive(data);
I don't know, how much does it helps in this situation, but I decided to put this answer for others looking for a solution for similar problems.
Yes, i also I fixed it changing in the js libraries to the unminified.
For example, in the tag, change:
<script type="text/javascript" src="js/jquery.ui.core.min.js"></script>
<script type="text/javascript" src="js/jquery.ui.widget.min.js"></script>
<script type="text/javascript" src="js/jquery.ui.rcarousel.min.js"></script>
For:
<script type="text/javascript" src="js/jquery.ui.core.js"></script>
<script type="text/javascript" src="js/jquery.ui.widget.js"></script>
<script type="text/javascript" src="js/jquery.ui.rcarousel.js"></script>
Quiting the 'min' as unminified.
Thanks for the idea.
Remember: Javascript functions are CASE SENSITIVE.
I had a case where I'm pretty sure that my code would run smoothly. But still, got an error and I checked the Javascript console of Google Chrome to check what it is.
My error line is
opt.SetAttribute("value",values[a]);
And got the same error message:
Uncaught TypeError: undefined is not a function
Nothing seems wrong with the code above but it was not running. I troubleshoot for almost an hour and then compared it with my other running code. My error is that it was set to SetAttribute, which should be setAttribute.
In case there are any morons out there like me, I had this frustrating problem because I forgot a simple
new
keyword before instantiating a new object.
I just had the same message with the following code (in IcedCoffeeScript):
f = (err,cb) ->
cb null, true
await f defer err, res
console.log err if err
This seemed to me like regular ICS code. I unfolded the await-defer construct to regular CoffeeScript:
f (err,res) ->
console.log err if err
What really happend was that I tried to pass 1 callback function( with 2 parameters ) to function f expecting two parameters, effectively not setting cb inside f, which the compiler correctly reported as undefined is not a function.
The mistake happened because I blindly pasted callback-style boilerplate code. f doesn't need an err parameter passed into it, thus should simply be:
f = (cb) ->
cb null, true
f (err,res) ->
console.log err if err
In the general case, I'd recommend to double-check function signatures and invocations for matching arities. The call-stack in the error message should be able to provide helpful hints.
In your special case, I recommend looking for function definitions appearing twice in the merged file, with different signatures, or assignments to global variables holding functions.
Make sure you have commented out any commentaries. Sometimes when copying and pasting you will leave out the "/*!"
Also when you go into the console they will list your errors and you should take it one at a time. If you see "Uncaught SyntaxError: Unexpected token * " That might mean it is reading your js file and it isn't getting past the first line.
/*!
* jquery.tools 1.1.2 - The missing UI library for the Web
*
* [tools.tabs-1.0.4, tools.tooltip-1.1.2, tools.scrollable-1.1.2, tools.overlay-1.1.2, tools.expose-1.0.5]
*
* Copyright (c) 2009 Tero Piirainen
* http://flowplayer.org/tools/
* File generated: Wed Oct 07 09:40:16 GMT 2009
*/
I got this when I accidentally passed too many parameters into a jquery function that only expected one callback parameter.
For others troubleshooting: make sure you check all your jquery function calls for extra parameters.