Why does cloneNode need to be used when appending a documentFragment?

Question

I\'ve been looking at using documentFragments in a Backbone.js app and was wondering why I see examples where \"cloneNode\" is used when appending the documentFragment to th

Answer 1

I'm not exactly sure, but in the context of the link you provided (performance testing) the oFrag.cloneNode(true) might be a safeguard against reusing the elements already added in DOM in previous runs of the loop, which would result in way faster execution of the test.

I see no reason to use it in normal use cases of documentFragments.