Uncaught Typeerror: cannot read property ‘innerHTML’ of null

var idPost=document.getElementById("status").innerHTML;

The ‘status’ element does not exist in your webpage.

So document.getElementById(“status”) return null. While you can not use innerHTML property of NULL.

You should add a condition like this:

if(document.getElementById("status") != null){
    var idPost=document.getElementById("status").innerHTML;
}

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