JSFiddle - React, Tailwind, and code Playground

HTML

<select id="DropDownTextFiledName">
    <option value="1">show</option>
    <option value="2">hide</option>
</select>
<input type="text" id="TextFieldName" />

JavaScript

$( "#DropDownTextFiledName" ).change(function() {
    if($( this ).val() == 2){
        $("#TextFieldName").hide();
    } else {
        $("#TextFieldName").show();
    }
});