That's because they kind of already does autoBind
for internal methods such as render
. In fact, if you call autoBind
and pass those methods you'll get an error.
For custom methods, initially the idea is that you might want to stick to whatever context you want to assign, but this is changed in 0.4.x (http://facebook.github.io/react/blog/2013/07/02/react-v0-4-autobind-by-default.html).
Basically because the bound this
is most of the time what you want, from now on every method in createClass
will now autoBind
by default.