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Use npm Packages

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <p id="mensaje"></p>
<p><button id="establecerCookie" />establecer cookie</button></p>

              var nombre_cookie = "testCookie";
var dias_cookie = 365;

function crearCookie(nombre, valorCookie, dias) {
  if (dias) {
    // el argumento dias es opcional
    // si no especificamos la data cuando expira, se considera que la cookie dura solo una sesion y es destruida enseguida que la sesión acaba.
    var data = new Date();
    // establece la data cuando la cookie expira en milisegundos
    data.setTime(data.getTime() + dias * 24 * 60 * 60 * 1000);
    //El método toUTCString() convierte la data en una cadena de texto (string), utilizando la zona horaria UTC (Coordinated Universal Time).
    var expira = data.toUTCString();
    var ruta = "/";
    /* "/" == el directorio raíz. O sea: la cookie es accesible en todo el dominio web 
        si var ruta = "/subdirectorio" la cookie será accesible solo en este subdirectorio. 
  var nuevaCookie = nombre + "=" + valorCookie + "; expires=" + expira + "; path=" + ruta;
  document.cookie = nuevaCookie;

function leerCookie(nombre) {
    var Nombre = nombre + "=";
    var cRy = document.cookie.split(';');// el array de las cookies
    for(var i=0;i < cRy.length;i++) {
        var c = cRy[i];// la cookie
        //recorta cualquier espacio en blanco al inicio:
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        // devuelve el valor de la cookie
        if (c.indexOf(Nombre) == 0) return c.substring(Nombre.length,c.length);
    // si ninguna cookie no fue encontrada
    return null; 

function borrarCookie(nombre_cookie) {

 mensaje.innerHTML = "Hola Gabi!";
 establecerCookie.style.display = "none";

var hayCookie = leerCookie(nombre_cookie);
if (!hayCookie) {
    mensaje.innerHTML = "Bien venido";
    mensaje.innerHTML = "Hola "+ hayCookie; 
    establecerCookie.style.display = "none";

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