When browser testing for FlightCar, I came across this error twice! And I was stuck for a while, as there are actually (at least) two different instances for which this error can occur and our javascript suffered from both of them. (This error is prevalent in IE7-9, IE10 works perfectly fine as well as the other standard browsers.)
Case 1: Dangling comma:
Internet Explorer doesn’t like dangling commas, whereas the other modern browsers skip past this error. For example:
var photo{
picture = 7,
comment = 12, <!–remove extra comma–>
}
Case 2: Using a reserved key word in a dictionary:
In my case, this word was class.
I originally had:
{class:”input-append”}
IE wants your reserved word to be a string, so I changed it to:
{“class”:”input-append”}
Hope that helps!
The Great Startup 
Posted on November 16, 2012
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