JSFiddle - React, Tailwind, and code Playground

HTML

<button class="speak">Speak</button>
<button class="eat">Eat</button>
<button class="walk">Walk</button>
<button class="getinfo">Get Info</button>

JavaScript

// Person Module
var Person = function ( name ) {
    
    // Private variables and functions that only
    // ..other private or public functions may access
    // ..and cannot be accessed outside this Module
    var age       = 0,
        maxAge    = 20,
        maxWeight = 40,
        isAlive   = true,
        weight    = 20,
        name      = name || 'Un-named';
    
    var growOld = function () { 
        age = age + 3;
        if ( age >= maxAge ) {
            die();
        }
    }
    var gainWeight = function () { 
        if ( weight++ >= maxWeight ) {
            die();
        }
    }

    var loseWeight = function () { 
        if ( weight-- <= 0 ) {
            die();
        }
    } 

    var die = function () { isAlive = false; }
    

    // All the properties and methods contained by 
    // ..this object being returned will be public
    // ..and will be accessible in the global scope.
    return {
        speak : function () { 
            if ( !isAlive ) {
                alert('Dead man can\'t speak.');
                return;
            }

            alert(name + ': Speaking..');
            growOld(); 
        },

        walk : function () { 
            if( !isAlive ) {
                alert('Dead man can\'t walk');
                return;
            }

            alert(name + ': Walking'); 
            growOld(); 
            loseWeight(); 
        },

        eat : function () {
            if ( !isAlive ) {
                alert('Dead man can\'t eat');
            }
            alert(name + ': Eating..');
            gainWeight();
        },
        
        getInfo: function () {
            alert("Age: " + age + "/" + maxAge + "\nWeight: " + weight + "/" + maxWeight);
        }
    }
}

// Create a person named Foobar
var foobar = new Person('Foobar');

$('button').on('click', function ( e ) {
    var btn = $( e.target );
    if( btn.hasClass('speak') ) {
        foobar.speak();
    } else if ( btn.hasClass('eat') ) {
      ...