Hi, yes it's true.
The issue that we are facing with the auto checkbox is that we need to recompile all the time, the whole bootstrap so it 's a kind of slow.
We will look for a solution for the next version.
One suggestion would be to use timeouts to add a delay to the input event handler, so it would wait until the typing has stopped for a while rather than recompiling on every key press. That's just a line or two of extra js and should make the auto updating vastly more usable.
yeh, good suggestion, we just added your advice. There are a lot to parse with Bootstrap ... still thinking about making it lighter