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In You may not need jQuery (Maybe you don't need jQuery) two cases are distinguished, the use in the application itself and the one of including jQuery as a library requirement. I leave the case of using jQuery as a library requirement out of the scope of this question because otherwise it would be too broad. This question is focused on the use of jQuery in the application itself.

The reference suggests using jQuery whenever possible, however there are questions on Stack Overflow that ask for answers using pure JavaScript.

Today here on Stack Overflow in Spanish there is a question that currently has two answers, one with jQuery and the other with pure JavaScript. This question is not about saying which of the two answers is better, but about better understanding the implications of using jQuery in a web application.

I mentioned above that the case of using jQuery as a library requirement is left out of this question so it's not too broad. I also ask to leave out comparing jQuery with other similar libraries.

In order for responses to qualify as objective and non-opinion based, they must include substantiated methodological/technical arguments focused on the implication of using or not using jQuery.

jQuery and its cousins ​​are great and should of course be used if they make it easier to develop your application.

However, if you are developing a library, please take a moment to consider whether you really need jQuery as a dependency. Maybe you can include a few lines of useful code and waive the requirement. If you're just targeting your library to newer browsers, you won't need anything more than what the browser already comes with.

At the very least, make sure you know what jQuery is doing for you , and what it isn't. Some developers think jQuery protects us from a big browser incompatibility demon when, in truth, post-IE8 browsers are pretty easy to handle on their own.

aria-Attributes beginning with and related to accessibility can be found on many web pages and in quite a few StackOverflow questions . For example:

<div class="text">
    <label id="tp1-label" for="nombre">Nombre:</label>
    <input type="text" id="nombre" name="nombre" size="20"
           aria-labelledby="tp1-label"
           aria-describedby="tp1"
           aria-required="true" />
    <div id="tp1" class="tooltip"
         role="tooltip"
         aria-hidden="true">El nombre es obligatorio</div>
</div>

What are attributes and what are they for aria-*? How many are there and which are the most important? And why should they be used?

I understand that they are architectures and that the idea of ​​these is once the web page is downloaded, it does not download any HTML or CSS or JS again, if not, it only makes calls or requests and is answered with JSON

What is the difference between HashMapand Hashtable? According to what I know about data structures, it would be the same conceptually, but in Java , what would be the difference?

Which is more recommended to be used in applications that use Threads?

Imagine that for a game you have a class NaveEspacialin which players have the ability, among other things, to change the name of the ship after having created it:

class NaveEspacial:
    def __init__(self, nombre, capitan):
        self.nombre = nombre
        self.capitan = capitan

    def imprimir_datos(self):
        datos = {
            'nombre': self.nombre,
            'capitan': self.capitan
        }
        print datos

    def renombrar(self, nombre):
        self.nombre = nombre

nave = NaveEspacial('Death Star', 'Cesitar')
nave.renombrar('Millennium Falcon')
nave.imprimir_datos()

# Resultado
{'nombre': 'Death Star', 'capitan': 'Cesitar'}
{'nombre': 'Millennium Falcon', 'capitan': 'Cesitar'}

If you wanted to know how many times the ship's name has been changed, you could add a counter:

class NaveEspacial:
    def __init__(self, nombre, capitan):
        self.nombre = nombre
        self.capitan = capitan
        self.total_renombres = 0

    def imprimir_datos(self):
        datos = {
            'nombre': self.nombre,
            'capitan': self.capitan,
            'total_renombres': self.total_renombres
        }
        print datos

    def renombrar(self, nombre):
        self.nombre = nombre
        self.total_renombres += 1

nave = NaveEspacial('Death Star', 'Cesitar')
nave.imprimir_datos()
nave.renombrar('Millennium Falcon')
nave.imprimir_datos()

# Resultado
{'nombre': 'Death Star', 'capitan': 'Cesitar', 'total_renombres': 0}
{'nombre': 'Millennium Falcon', 'capitan': 'Cesitar', 'total_renombres': 1}

But the above would only help me know how many times each instance of the class, that is, each ship, has been renamed:

nave = NaveEspacial('Death Star', 'Cesitar')
nave.imprimir_datos()
nave.renombrar('Millennium Falcon')
nave.imprimir_datos()

nave = NaveEspacial('USS Enterprise', 'Fiorella')
nave.imprimir_datos()
nave.renombrar('USS Centaur')
nave.imprimir_datos()
nave.renombrar('USS Challenger')
nave.imprimir_datos()

# Resultado
{'nombre': 'Death Star', 'capitan': 'Cesitar', 'total_renombres': 0}
{'nombre': 'Millennium Falcon', 'capitan': 'Cesitar', 'total_renombres': 1}
{'nombre': 'USS Enterprise', 'capitan': 'Fiorella', 'total_renombres': 0}
{'nombre': 'USS Centaur', 'capitan': 'Fiorella', 'total_renombres': 1}
{'nombre': 'USS Challenger', 'capitan': 'Fiorella', 'total_renombres': 2}

What I need is to count the total calls to the class method and not the total for each instance . I know that one way could be to accumulate all the ships and add the attribute total_renombresof each one:

naves = [nave1, nave2, nave3]
total = sum([nave.total_renombres for nave in naves])

But I want to know if it's possible to do this at the class level, as some kind of persistent variable for the lifetime of the game. Is there a way to do it?

Note:

For now I want to keep it simple and avoid using Databases.

Update 1 (answer from @RuslanLópezCarro)

It is possible to get the total by creating a variable of the class, but that would mean having to manually increment the variable each time the method is called renombrar():

nave1 = NaveEspacial('Death Star', 'Cesitar')
nave1.renombrar('Millennium Falcon')
NaveEspacial.total_llamadas += 1 # Incrementar

nave2 = NaveEspacial('USS Enterprise', 'Fiorella')
nave2.renombrar('USS Centaur')
NaveEspacial.total_llamadas += 1 # Incrementar
nave2.renombrar('USS Challenger')
NaveEspacial.total_llamadas += 1 # Incrementar

nave3 = NaveEspacial('ABC', 'Tany')
nave3.renombrar('XYZ')
NaveEspacial.total_llamadas += 1 # Incrementar

print NaveEspacial.total_llamadas 

# Resultado 4

Which doesn't seem like an option to me, I want to do it automatically with each method call.