If this question is inappropriate on this site, please tell me where I should ask this question.
alert("Hello World!");
I have ran this simple code on codepen JS editor and Chrome developer console for hundreds of times and it has worked. It also had no problems running as an embeded code on the tutorial website I was following.
However, for some reason I'm getting no response (i.e. no modal window popups) when I try to run the alert code above on Codepen and JSFiddle. However it works on js.do online javascript editor, Chrome developer console, and the tutorial website I've linked above.
Please note that I've tried using different browsers, changing site settings, and even restoring browser settings and clearing browser data.
I usually use Codepen while I'm learning JavaScript, so I want to know what's the problem.
It seems there can be a new browser restriction. If I try to add an alert to Codepen and look to the Chrome console I see this warning:
A different origin subframe tried to create a JavaScript dialog. This is no longer allowed and was blocked. See https://www.chromestatus.com/feature/5148698084376576 for more details.
There is a website that I must use at work quite a bit and the only browser it works on is Internet Explorer.
I'm presuming this is because the code is outdated/incorrect and includes javascript that only IE is able to read.
This is a problem, because I want to use Firefox or Chrome, they are much better browsers.
I believe the issue is Firefox/Chrome (hereinafter referred to as foam) not being able to recognize the following "onclick" command lines. When I press these buttons, the web page does not change as it should.
<button class="MenuButton" title="Create ICL" value="ADDICL" onclick="PageJump('ICLMain.asp?From=ICLHome')">Create ICL
So.... since this is not my website, I cannot re-write all of this code to fix it. It is a corporate owned underwriter website for creating a certain document.
There must be some sort of extension that enables Firefox/Chrome to read Javascript codes like Internet Explorer so that I can use Firefox/Chrome and still use this website.
Try to use chrome extension ie tab, https://chrome.google.com/webstore/detail/ie-tab/hehijbfgiekmjfkfjpbkbammjbdenadd?hl=es. This extension emulate The ie Explorer.
I'm also facing the same problem(Javascript broke). The solution I found is to just add https:// before the link and reload the page and everything will work fine again.
IE so much confusing me with some errors like this,
SCRIPT1002: Syntax error
File: jquery-2.1.4.min.js, Line:2 Column 2538
The weird thing is , on firefox and chrome running well and no error.
And some button with jquery click function is working.
I'm Using IE 11
Before this i'm using jquery-1.1.13.min.js and when i use jquery 2.0 it still running properly on firefox and chrome
I'm really new with cross browser so any info will helping me very much, thanks :)
For the record I had this error which only showed itself on IE when doing cross-browser testing of a big Javascript code change.
In my case the problem was a function definition which included what would be a default in any other language:
i.e. Function Foo(param1, param2, param3=false)
.. clearly this was a stupid bit of code .. but it took me a while to track down so this might help someone out there. Doesn't show up in Chrome, FF, or even Edge.
Mostly these errors are not problems of jQuery itself. The problem situates in code using jQuery or inserted into jQuery (callbacks or event functionalities). In my case I used $.ajax to load a remote page in a div element. In the page I loaded there where // comment tags in the javascript part. As IE is putting this content on one line, more code that as I wanted was commented and this created the error.
So if in our case us are using $.ajax maybe this can be an issue. Otherwise best thing to do is debugging the code that generates this error and look for code that is not supported by IE (the version you use). Look for functions passed trough to jQuery.
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 :)
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.