Accessing Document inside Object using plain Javascript -

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I have a sample HTML structure, where two DOMs are available at the same HTML below. I use javascript in HTML to & lt; Object & gt; Embedded inside the tag, & lt; H1 & gt; Trying to access the tag I tried to use the following javascript and could not get the text value of H1. Please note, I just do not want to use javascript via javascript. 

  & lt ;! DOCTYPE html & gt; & Lt; Html & gt; & Lt; Top & gt; & Lt; Meta charset = "UTF-8" & gt; & Lt; Title & gt; Test JS & lt; / Title & gt; & Lt; / Head & gt; & Lt; Body & gt; & Lt; Div class = "parent" & gt; & Lt; H1 class = "header_Child" & gt; I'm within the original HTML & lt; / H1> & Lt; Div class = "objectWrapper" & gt; & Lt; Object type = "text / html" & gt; #document & lt ;! DOCTYPE html & gt; & Lt; Html & gt; & Lt; Top & gt; & Lt; Title & gt; I have an embedded HTML & lt; / Title & gt; & Lt; / Head & gt; & Lt; Body & gt; & Lt; H1 class = "header_Child" & gt; I have HTML inside the & lt; / H1> & Lt; / Body & gt; & Lt; Html & gt; & Lt; / Object & gt; & Lt; / Div & gt; & Lt; / Div & gt; & Lt; / Body & gt;

Javascript: 

  var obj = document.getElementsByTagName ('object'); Var header = oz. [1]. Some selectors all ('H1'). InnerHTML;

document. GetElementsByTagName () no array document So that you can not call querySelectorAll on it that you need to get the first element of the array and handle it.


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