Appending string to a user input can stop xss in jquery selector?

Question

I've found that a user input was passed to jquery selector sink $() This is known to be vulnerable because having something like :

$("<img src='/' onerror=alert('xss');>")

Will result in an alert in the page

But in this case the user input was added to a class selector so the query looks like :

$(.somethingX)

Where X is the user input And because of that when adding something like a tag , it results in an error :

Uncaught Error: Syntax error, unrecognized expression: .someting <img src='/' onerror=alert('xss');>

So the question will be is there a way to bypass that and get xss ? Is appending something to the user input in this case enough to be secure ?

I've also tried to add something like valid class and then add h1:contains('payload') but this will not create the dom element ,because I think it was patched by jquery .

Thanks .