I am trying to find the official JavaScript logo. I have Googled it and found that some people say there is no official logo, but have also seen the following:
In this one, I assume the HTML5 and CSS 3 are the official ones.
Does anyone know if there is one that is recognised as a JavaScript logo?
I too was about to say there is no official logo. But the first one you show there with the solid yellow and black JS in the lower right corner is pretty universal and I would say is closest to being official. It is the one I have seen on many high profile sites and even popular JavaScript books. I would go with that one.