I get that error :
Uncaught TypeError: Cannot set property 'onclick' of null
initJavaScript
File:
http://www.radiomrs.pl/wp-content/plugins/pierres-wordspew/ajax_shout.js
91 line
Why it's something like that?
On site http://radiomrs.pl shoutbox work nice.
You should trust your browser... ;)
Go to line 91 of ajax_shout.js and you'll find:
document.getElementById('submitchat').onclick = sendComment;
document.getElementById('submitchat') is null, that is there's no such element in your DOM, or the element has not been loaded yet when the script tries to access it.
Related
I am using google tag manager in my chrome-extension, but on the maximum website, it will not load properly, give me the error Cannot read property 'parentNode' of undefined (f.parentNode.insertBefore(j,f)).error image
my google tag code image
For some reason, the variable f in the line f.parentNode.insertBefore(j,f) is undefined. Here is the declaration of f, which is on line 11 of gtm.js in the screenshot you posted:
var f=d.getElementsByTagName(s)[0]
The variables d and s are being passed in as document and "script", so f should be the first <script> tag on the webpage. The only case I can think of that would make this fail is when the page has no <script> tags. Normally this would not be the case because the GTM script is usually on the page, but since you're using a Chrome Extension, it may not be.
I would try this instead:
var f=d.head.firstChild
I need some help as I can't figure out how to change a string in my chrome extension.
So here is some code.
var num = (JSON.parse(localStorage.getItem("boxes")));
window.document.getElementById("boxes").innerHTML = "Looted Boxes: " + num;
And this throws me an error saying : "main.js:7 Uncaught TypeError: Cannot set property 'innerHTML' of null"
Checklist:
Yes I have a p with the id boxes.
Yes I have liked my script correctly with it only running when DOM has fully loaded.
How would i solve this problem?
I found this code;
navigator.appVersion.match(/MSIE ([\d.]+)/)[1];
For detecting browser version. This code works in IE 8 below but not on google chrome. The error in google chrome says;
Uncaught TypeError: Cannot read property '1' of null
and it points to the line where this code belongs;
navigator.appVersion.match(/MSIE ([\d.]+)/)[1];
Any idea how to fix this issue?
just to make things clear what i'm trying to accomplish here is to detect the browser version:
var version = navigator.appVersion.match(/MSIE ([\d.]+)/)[1];
if(version <= 8.0)
{
execute code;
}
Everything works fine in IE but I got an error in google chrome which is:
Uncaught TypeError: Cannot read property '1' of null
and it points to the line where this code belongs;
navigator.appVersion.match(/MSIE ([\d.]+)/)[1];
match can return null if regexp don't find anything. So you must first get matches and check have you any match or not. Try this:
var ieMatches = navigator.appVersion.match(/MSIE ([\d.]+)/);
var isIE = !!ieMatches[1];
I get the following error and iPad but not in desktop browsers:
JavaScript: Error
undefined
TypeError: 'undefined' is not a function
This is a larger js application, and this error message is totally unhelpful. Is there any way I can get the line number of the error or anymore information?
Update: This just got funky.
line : 0
page : undefined
desc : TypeError: 'undefined' is not a function
chr : undefined
Did the user agent spoofing in FF and safari. No error.
You could try registering a custom error handler to window.onerror
window.onerror = function (desc,page,line,chr)
{ alert('Line:'+line); }
desc = Error message
page = File/Page where the error occured
line = Well...
chr = Character position of the error in the line
If you bind an error handler to window.onerror, it should give you the line number, e.g.
window.onerror = function(msg,url,line) {
alert('The error is on line '+line);
}
This question: Debug JavaScript errors on iPad seems to indicate you can enable debugging too.
If the script is loaded dynamically, though, it can be hard to get such info in any environment.
I have a page which is showing a javascript error in IE, stating which line the error is on, but the there are so many linked files I have no idea which line of code it is referring to.
Is there a way to find out which line / linked file it is relating to?? I'm sure I could fix the problem if I knew where it was.
Here is the error message from IE...
Message: 'null' is null or not an object
Line: 2231
Char: 5
Code: 0
URI: http://www.hpbtenancies.co.uk/location/JF/default.aspx
It happens on the line the error reports.. 2231 on default.aspx
dd.onchange = function(){ link.href = hrefOrig + dd.value;
The detailed error is
dd is null
Use Firefox which has better reporting and also use FireBug for even more flexibility in debugging javascript..
IE 8+ also has improved javascript debugging tools. In the console you will see
SCRIPT5007: Unable to set value of the property 'onchange': object is null or undefined
default.aspx, line 2231 character 5
Right-click on the page with the error, click 'View source', scroll down until you reach line 2231 - that's where your error is.