JSFiddle - React, Tailwind, and code Playground

HTML

<button class="run">run test()</button>
<button class="true">true</button>
<button class="false">false</button>

JavaScript

function func(){
  $('body').on('click', '.true', function() {
    return true;
  });

  $('body').on('click', '.false', function() {
    return false;
  });
}


function test(){
  var r = func();

  if(r==false){
  	alert('false');
    return false;
  }

  alert('it works');
}


$('body').on('click', '.run', function() {
  test();
});