javascript - Is it possible to get element's numerical index in its parent node without looping?

Question

Normally I'm doing it this way:

for(i=0;i<elem.parentNode.length;i++) {
  if (elem.parentNode[i] == elem) //.... etc.. etc...
}

question from:https://stackoverflow.com/questions/4649699/is-it-possible-to-get-elements-numerical-index-in-its-parent-node-without-loopi

Answer 1

You could count siblings... The childNodes list includes text and element nodes-

function whichChild(elem){
    var  i= 0;
    while((elem=elem.previousSibling)!=null) ++i;
    return i;
}