What is the difference between vendor prefixes webkit and WebKit (diff case)?

Question

I see that vendor prefix is used in smaller cases in some API (webkitURL, for example) and in camel cases in some API (WebKitBlobBuilder). What is the difference?

Answer 1

Reply from PhistucK on Chrome DevTools Google group:

Constructors have have their WebKit prefix capitalized. Members (properties, methods, events) have a lower cased prefix. URL is not a constructor, its naming is just a bit unconventional. Blob is WebKitBlob window.URL is window.webkitURL navigator.getUserMedia is navigator.webkitGetUserMedia