When you search for information on google, the results page contains a 'tools' link up top. If you click it, you have the option to restrict your search to a variety of time frames.

In my experience, any result from more than a year ago is likely to be irrelevant in the world of javascript.

This is a game changer! I've always added the desired year to my search terms hoping that would match a date on a page, but this is much more precise.

Thanks!