the following code is the relevant part of a js script, mostly it works fine, apart from the load function which refuses to work no matter what i do, yet it works if I copy paste it to the console of chrome
I can't seems to notice the issue
$(document).ready(function() {
$('#addTask').click(function(event){
var content=$('#currentTask').val();
$.post('tasks', {param1: content}, function(data) {
$('#tasksBlock').load(location.href+' #tasksBlock')
});
})});
if you face same issue, make sure the js is not being cached by checking the content of the file through the sources tab of the chrome or fire fox developer tools
Why does Firebug say there is No Javascript on this page when there are clearly loads of JavaScript on the page. I even reloaded the page several time to make sure but it still show the same message.
It never used to do that before, but all of a sudden it misbehaves.
Is it because of some configuration issues or because of something else?
As of Firefox version 50, it seems that Firebug will no longer work as Mozilla are migrating to Firefox Devtools. The tab Tools/Web Developer has a 'debugger' option. See this page for a discussion on the migration. Read all the posts dated 19 November for further information.
It seems to me that the option gives less functionality but Firebug per se is never going to be fixed for Firefox 50 and beyond
EDIT 2017 April
This answer is now outdated and I'm not even testing it anymore because I'm no longer using Firebug (a shame, I loved it years ago in a time it was The tool of trade for web developing).
EDIT 2014 November
The original answer is now more than a year outdated due to firebug evolution.
Thanks to #AmadeusDrZaius to keep it on tracks
Answer for outdated firebug versions
For anyone still with this problem after updating Firebug.
Just click Clear Activation List option inside the Firebug menu.
For those who can't find it, note that "Clear Activation List" shows up in the dropdown from the Firebug icon in the toolbar, but not the Tools > Web Developer > Firebug menu.
I guess due to the bug previous hitting your working page it stays listed as "no activate FB for this site please".
I encountered No Javascript on this page after upgrading Firefox to ver 50.0, with Firebug ver 2.0.18. I tried refreshing Firefox, even completely uninstall Firefox and installed again. Nothing works for me.
A couple of hours later, I downgraded Firefox to 49.0.2, and voila, it works right away. I downloaded the old version here.
I tried everything on this list and nothing worked for me except resetting Firefox like so:
https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-problems
I realize there are already 10 answers to this question, but in my case none of them helped. I'm running Firefox version 39.0 and Firebug version 2.0.11. The only fix is to completely restart Firefox (i.e. not just the tab or instance with the problem).
Perhaps it's due to Firefox's over-usage of memory, or maybe there's a bug in Firebug. I can't speak to that, but what I do know is it didn't work. I killed Firefox, opened the exact same page again with no changes made and now it works. This has happened to me numerous times and a complete restart always fixes it, but that's the only thing that does.
Since Firefox 49.0 and Firebug 2.0.18 the Script panel is broken. This is due to some internal Firefox API changes. And because Firebug is officially discontinued, this unfortunately won't get fixed anymore.
There was also a bug in Firebug 2.0.11 (and below) in combination with Firefox 39.0 causing this problem. This bug is filed as issue 7918.
It happens when the Script panel is enabled and you close Firebug and reopen it.
You can see two related error messages logged to the Browser Console (can be opened via Ctrl+Shift+J or Firebug menu > Developer > Browser Console):
error occurred while processing 'attach: TypeError: docShell is null
Stack: getChildDocShells#resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/server/actors/webbrowser.js:53:7
...
and
onPacket threw an exception: Error: Server did not specify an actor, dropping packet: {"error":"unknownError","message":"error occurred while processing 'attach: TypeError: docShell is null\nStack: getChildDocShells#resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/server/actors/webbrowser.js:53:7
...
Solution:
The only solution until this bug is fixed is to restart Firefox completely.
Similar things have happened to me because I forgot to add the closing tag.
DON'T do this:
<script src="some.url" type="text/javascript">
or
<script src="some.url" type="text/javascript"/>
DO this instead:
<script src="some.url" type="text/javascript"></script>
The same problem just happened to me. I thought that it was a problem in my scripts, but I checked google.com and the problem persisted.
My problem was that I had updated my version of FF and kept the old version of FireBug. When I updated FireBug and everything was solved.
From firefox 49, the fire bug will be built in and it is called fire-bug next. So the fire bug add on won't work properly and no issues will be solved. So you can use firefox inspector. See here for details information
If the problem only shows up on a single page, check that your script folder is referenced from current folder (".") or that's reachable from the server root ("/").
<script src="./scripts/pagescripts.js" type="text/javascript"></script>
may not be the same as
<script src="/scripts/pagescripts.js" type="text/javascript"></script>
As mentioned, sometimes there's a Javascript syntax error that invalidates the whole script. But I have also had this, and simply opening up the page in a new tab or window and refreshing firebug (disable, enable) gets the javascript to show up again.
One time this caught me out was when I published one of my sites and I was checking it out. No Javascript was working, there were no errors in the console and firebug showed no scripts.
It turned out that in that instance, I'd forgotten to allow the site in NoScript - so there really were no scripts being loaded.
Not sure if that's the problem you're facing but it's worth being aware of.
I also got this error when attempting to use Ajax to a different server than the one serving up the page. JavaScript only allows Ajax access to the server that served up the page.
This problem is STILL happening (Aug 2015) with Firefox 39.0.3 and Firebug 2.0.11
For people saying the code is wrong or missing end tags etc. all I did to get all the javascript to reappear in tab was to shut down Firefox and restart it. I didn't change anything. Also that "Clear Activation List" option didn't work (no idea what that means)
I upvoted #Tom_Thomson's answer above, but I am wondering if simply removing and then reinstalling the Firebug add-on might not have accomplished the same thing without losing all the other stuff like bookmarks.
FWIW this problem is still happening in August 2016. I'm using Firebug 2.0.17 with Firefox Dev Edition 50.0a2.
As a workaround, I'm able to use the Developer Tools, though they are not as robust as Firebug (when it's working).
Well Firefox native Inspector is good... I know that you will miss some things, but in general we can survive with it. The good news is... less one addon, FF will be faster :)
We are building a Saas product and have purchased a bootstrap dashboard, all the JS/CSS assets are loaded though a sobdomain via our CDN.
Works perfectly on chrome but on ie and ff the components do not load properly, on ff I get the following errors:
TypeError: can't access dead object
ReferenceError: event is not defined
A link to a non working example is below (We don't want to give access to our working dashboard for commercial reasons) You can see the error when click on the "dropdown" menu item. As far as I can tell, all the assets are loading correctly.
http://hunchbuzz.com/acme/index.html
Any help would be appreciated.
Well, take your bugs one by one. Did you turn on the JavaScript Debugger when you tested your page in IE? In the F12 developer tools, select Script and then Start Debugging.
First there were a couple of errors in jquery.sparkline.min.js which I ignored for the moment. Then I tried clicking your 'dropdown' link and got this error:
SCRIPT438: Object doesn't support property or method 'preventDefault'
custom.js, line 3 character 1193
The highlighted code is (reformatted for readability):
$('.dropmenu').click( function(){
event.preventDefault();
// ...
});
Do you see the problem? What is event? The code should be:
$('.dropmenu').click( function( event ){
event.preventDefault();
// ...
});
The fact that it worked in any browser at all is probably due to the global event variable that some browsers create for compatibility with very old code.
Now back to the sparkline problems. I see it hitting two errors in jquery.sparkline.min.js, but with the minimized code the problem isn't jumping out at me the way the other one did.
When you're debugging, it would help a lot to load the non-minified versions of jquery.sparkline.js, custom.js, jQuery, etc. Then you'll have readable code to look at in the debugger, which should make it easier to spot these problems.
I am trying to debug my javascript & jQuery and step through it using firebug.
I am running my code on an Apache server (2.4) on a windows machine.
I used the firefox browser version 18.
When i go to run my code, I can't see my javascript (external file) in the scripts panel.
I see the linked jQuery library on the panel but I dont see my javascript code.
On the Firebug, the scripts are clearly linked in the HTML panel. But on the script panel, only the jQuery.js is visible. i would post a screen shot but i dont have enough reputation right now.
I dont know what is going on and what i have to do in order to be able to step through my javascript code.
UPDATE
I placed the "debugger" on my javascript code but it still not showing on the 'script panel'.
debugger;
$(document).ready(function () {
var email_default = "Enter your email address...";
$(':input[type="email"]').val(email_default).on('focus', function () {
if ($(this).val() == email_default) {
$(this).val(' ');
}
});
I also tried to do a browser refresh, disable and re-enable all the firebug panels- but it still won't show my external javascript. I had also double checked my file location & directories to make sure i am linking it correctly.
If Firebug (or other browser developer tools) doesn't show a JavaScript in the list of available scripts, this means it has a syntax error.
In that case you need to switch to the Console panel and check there for the error.
Notes:
As mentioned in a related answer, there can also be other reasons why there are no scripts shown in the list:
Since Firefox 49.0 and Firebug 2.0.18 the Script panel is completely broken. This is due to some internal Firefox API changes. And because Firebug is officially discontinued, this unfortunately won't get fixed anymore.
There was also a bug in Firebug 2.0.11 (and below) in combination with Firefox 39.0 causing this problem. This bug got filed as issue 7918 and fixed for version 2.0.12.
It happens when the Script panel is enabled and you close Firebug and then reopen it.
I am using Aurora 14.0a2 as my default browser (its the early release of firefox)
I have went into my about:config and have changed the value of services.sync.prefs.sync.dom.disable_window_move_resize; to false
Yet when I run my website the resizeTo(); function still doesn't work
here is my code:
jsfiddle_link
function onload(){
window.resizeTo(600,800);
}
I also tried it in other browsers:
Chrome (no surprise it didn't work since chrome never supports it)
opera
IE 8
Safari
None of which worked
I also tried making a link from a different website linking my website then clicking on it but it did not do the trick
any ideas?
I think the resize functionality of javascript would only work when you open it on popup windows and not when your openning it on a main browser window try checking on this link http://www.javascripter.net/faq/windowresizeto.htm it has the sample that I think would help you.