JSFiddle - React, Tailwind, and code Playground

HTML

<select id="A" onchange="change_val()">
    <option value="A">A</option>
    <option value="B">B</option>
    <option value="C">C</option>
    <option value="D">D</option>
</select>

<input type="text" id="selected_value" value=""/>

JavaScript

function change_val() { 
   
   alert("test");
   $("A").on("Change",function(e)
			{
				alert("testsOnChange2");
				console.log("masuk");
				$("selected_value").val("indonesia");
			});
}