I have a HTML related question. In stack overflow / programmers, is it a good practice to refer code shared in jsFiddle? Or should I post the code in the question itself?
In the first instance why are you asking on Meta Programmers rather than Meta Stack Overflow?
However, to answer your question - you should post the minimal code that reproduces the problem in the body of the question. Don't make people go to an external resource for the code.
Personally I wouldn't follow the link.
There's nothing wrong with linking to the same code as a jsFiddle if it helps demonstrate the problem, but the question should stand alone.