javascript - How get element by id with other context? -

i want understand how can element id of 'takeme' in other context not document, example:

<div id="parent">   <div id="takeme"></div> </div> 

i know can use:

document.getelementbyid('takeme'); 

being document context, want know how can takeme parent, without using queryselectorall, trying to:

var parent = document.getelementbyid('parent'); parent.getelementbyid('takeme'); 

but of course didn't work.

getelementbyid htmlelement not work because getelementbyid defined document. there document.getelementbyid there not element.getelementbyid.

as commenters have mentioned, not needed parent node since id should unique document.

however, other methods element.getelementsbyclassname should work different context(htmlelement)

var parent = document.getelementbyid('parent');  var fromothercontext = parent.getelementsbyclassname('takeme');  console.log(fromothercontext);    fromothercontext = parent.getelementbyid('takeme');  console.log(fromothercontext);//only works document

<div id="parent">    <div class="takeme"></div>    <div class="takeme"></div>    <div class="takeme"></div>    <div id="takeme"></div>  </div>