JavaScript - DOM Manipulation - Is construction a page first then attaching?

Question

New to javascript...and dom manipulation...Let's say I'm using java-script to construct part of a page that has a bunch of sub-elements.

<div>my-sub-elements</div>

Should I create a stand-alone-div attach the elements inside then attach the whole thing to the DOM?

Or should I attach the elements one by one to the DOM?

Answer 1

通常，您不会注意到有什么区别，但是如果确实需要它，那么构造分离的DocumentFragment并将其附加到一个步骤中，要比将实时DOM树多次弄乱要快得多。