Unknown pseudo class - Opera

[anonymous]

I was testing each browser (except IE) for the jQuery Form Plugin with a file input with multiple selection e.g.

<input type="file" name="file" multiple="multiple" />

Now, when the upload is processing, Opera does nothing except thrown this strange error I've not seen before and I have no idea where it's coming from except it has used the selectors inside the form.

What is throwing this kind of error, Firefox, Chrome and Safari works well, but except Opera...

Perhaps this needs to be looked into or reported to Opera?

[miketaylr]

Can you provide a test case somewhere? And/or report this to Opera? ​https://bugs.opera.com/wizard/

[addyosmani]

This ticket reminds me a lot of #7291. Because you're attempting to use custom pseudo selectors you're willingly using invalid CSS selectors which can result in warnings being output, depending on the browser. If you don’t want to see warnings, you could avoid using these. This is almost definitely an Opera related issue (imo) but I'll wait until miketaylr has had a chance to investigate further before we close.

[trac-o-bot]

Because we get so many tickets, we often need to return them to the initial reporter for more information. If that person does not reply within 14 days, the ticket will automatically be closed, and that has happened in this case. If you still are interested in pursuing this issue, feel free to add a comment with the requested information and we will be happy to reopen the ticket if it is still valid. Thanks!