JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">
<input type="hidden" id="people_0_1_0" value="12"/>
<input type="hidden" id="people_0_1_1" value="12"/>
     
     <input type="text" id="people_0_1_1" value="12"/>
     
     
     
</div>

JavaScript

var els=document.getElementById('main').childNodes;
var allVal=[];
for(i=0; i<els.length-1; i++)
{
   if(els[i].nodeType != 3 && els[i].type=="hidden") allVal.push(els[i].value); 
}
console.log(allVal); 
console.log(allVal[0]);