JSFiddle - React, Tailwind, and code Playground

HTML

<input id="000001">
<input id="000002">
<input id="000003">
<input id="000004">

JavaScript

var mydata ={
    "000001": "firstValue",
    "000002": "secondValue",
    "000003": "thirdValue",
    "000000": "This id does not exist",
    "000004": "fourthValue"
}


for (var key in mydata) {
      var input = document.getElementById(key);
          if(typeof input !== 'undefined' && input !== null) {//skip non exixting ids
            input.value= mydata[key];
          }
}