How to find with javascript if element exists in DOM or it's virtual (has been just created by createElement)

Question

I\'m looking for a way to find if element referenced in javascript has been inserted in the document.

Lets illustrate a case with following code:

v         


        

Answer 1

function isInDocument(query){
  return document.querySelectorAll(query).length != 0;
}
// isInDocument("#elemid")