JSFiddle - React, Tailwind, and code Playground

HTML

<input id="input1"/>
<input id="input2"/>

JavaScript

$('#input1').bind('keyup',function() {
         var str = '';
         var input = $(this).val();
         var intVal = parseInt(input, 10); // Dont forget the radix
         var map = {
             "1":"One",
             "2":"Fish",
             "3":"Bar"
         };

         if (intVal > 50 && intVal < 100) {
             str = 'Something';
         } else if (map.hasOwnProperty(input)) {
             str = map[input];
         }
    
         $('#input2').val(str);
    });