Google Chrome: JavaScript Error Message
Question
When using Google Chrome, I receive the following error message:
Error:
Uncaught SyntaxError: Unexpected token <
It occurs directly after my doctype declaration at the top of my HTML page
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Any ideas what this JavaScript error message is? It only seems to occur with Google Chrome (works fine in Safari, Firfox and IE)
10 answers
solution1
14 2010-02-26 14:27:15
This problem occurred for me when I was using JQuery to load in HTML from an XMLHTTPRequest that was HTML, but the mime type was text/javascript.
So for example, I had some code such as:
jQuery.ajax({
data:'params=here',
success:function(request) {
jQuery('#country_list_container').html(request);
},
type:'get',
url:'/getHtml'
});
jQuery is sending a request to getHtml, and getHtml is returning a simple snippet of HTML, with a mime/type however of "text/javascript" . The reason the getHtml action was returning text/javascript is because the accept header of the request from jQuery is:
"Accept:text/javascript, text/html, application/xml, text/xml, */*"
So, all I had to do was force a header of text/html and everything worked perfectly.
The parse error you are seeing is a result of Javascript trying to eval the content.
solution2
2 2010-06-02 23:31:30
In my case it was caused by an eval() statement aborting. When I fixed the problem the error message disappeared.
At the present time (June 2010) Chrome Javascript has a buggy eval() statement. eval() will abort without issuing an error message if a variable in the eval() statement has been assigned the reserved word ' delete '. It took me almost a week to uncover this bug because eval() aborts without any warning or error message, and the abort has nasty side-effects.
I was using eval() to achieve this result: obj.delete = somevalue.
This code will cause an eval() abort:
var obj = new Object();
var x = 'delete';
var y = 2;
eval('obj.' + x + ' = y');
This code works:
var obj = new Object();
var x = 'delete';
var y = 2;
eval('obj[\'' + x + '\'] = y');
In summary, don't use eval() to construct obj.delete = somevalue . Use eval() to construct the equivalent statement obj["delete"] = somevalue .
solution3
1 2010-02-08 06:01:24
Try switching the order of your css and js declarations. Worked for me.
solution4
1 2010-06-06 20:10:03
如果要在JSON中返回对ajax请求的响应，请确保对Content-Type使用'application/json' 。
solution5
1 2008-12-26 07:09:27
也许HTTP内容类型不是text/html或application/xhtml+xml ？
solution6
1
I found this Google Groups question.
Some others are experiencing the problem but without resolution.
http://www.google.com/support/forum/p/Chrome/thread?tid=7e9f87870a37e401&hl=en
solution7
1 2011-08-15 05:54:14
At the risk of dredging up an old thread (I figure its better to keep all the info in one place), Chrome is still throwing these errors it seems. I got the following while developing a site and tried all kinds of things with the page JS and PHP to get rid of it. The error I got was:
error in event handler for 'undefined': SyntaxError: Unexpected token ILLEGAL
chrome/EventBindings:183
Eventually while checking code validity in FireFox I stumbled across the answer as a warning that there was a '&' in some text that should be converted to '&' - once this was done the Chrome error went away.
Steve
solution8
0 2010-04-23 21:56:52
I had this problem when I was trying to set .innerHTML dynamically generated with php (it was generated multi-line).
Replacing new line characters by spaces solved the problem.
solution9
0 2015-01-31 00:42:29
I also encountered this error in Chrome Dev Tools, and my cause was similar to Matthew O'Riordan's except it wasn't the Accept MIME-type but rather the broken AJAX URL.
I had rearranged my folder structure and forgot to update the URL; once I fixed the URL, the Dev Tools JS Error was gone. Hope this helps! :)
solution10
0 2010-11-29 14:53:21
如果是Rails应用程序，请检查format.js是否在response_to块中。
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