JSFiddle - React, Tailwind, and code Playground

HTML

<div id="alert_btn"><a href="javascript:alert_fn();">click_me</a></div>

JavaScript

function alert_fn(){
    $.get('http://www.patan77.com/example_test.txt', function(data) {
        alert(data);
        if (data == true){
            alert("true");
        }else{
            alert("false");
        }
    });   
}