const obj = {
  valueForFirstinput:  'nice', 
  valueForSecondInput:  'good'
}

const objectValues = Object.values(obj);

const parent = document.querySelector('div');
Array.prototype.forEach.call(parent.children, function(child, index){
 child.value = objectValues[index]
});

<div class="inpus-wrapper">
  <input type="text" value="add gadget"/>
  <input type="text" value="add gadget"/>
</div>

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