JSFiddle - React, Tailwind, and code Playground

JavaScript

var boolean_primitive = false;
var boolean_object = new Boolean(false);
alert ("Example: \r\n" +
       "!boolean_primitive = " + !boolean_primitive + "\r\n" +
       " BUT \r\n" +
        "!boolean_object = " + !boolean_object + "\r\n" +
       "because the boolean value of a defined object is always true"
      );