The HTMLSelectElement.namedItem() method returns the HTMLOptionElement corresponding to the HTMLOptionElement whose name or id match the specified name, or null if no option matches. 
 In JavaScript, using selectElt.namedItem('value') is equivalent to selectElt.options.namedItem('value').
 
<form>
  <select id="myFormControl">
    <option id="o1">Opt 1</option>
    <option id="o2">Opt 2</option>
  </select>
</form>
  
let selectElt = document.getElementById("myFormControl");
elem1 = selectElt.namedItem("o1"); 
  But, you cannot write:
 
let selectElt = document.getElementById("myFormControl");
elem1 = selectElt.o1; 
elem1 = selectElt["o1"];