JSFiddle - React, Tailwind, and code Playground

HTML

<select id="select1">
  <option>One</option>
  <option selected>Two</option> <!-- setting this as default disables the input -->
</select>
<input type="text" id="text1" />

JavaScript

$("#select1").on('change', function() {
    $("#text1").prop('disabled', this.value !== 'One');
}).trigger('change');