How to Interrupt setInterval in Javascript?

Question

how do I interrupt the execution of a setInterval that is running on a module that I no longer need? I’m not talking about just catching the feedback from setInterval and execute a clearInterval. Isn’t that...

Example:

app js.

// Rota de data e hora para uma página que exibe em tempo real essa informações para o usuário
const dateTimeSystem  = require('./routes/date-time');
// outros códigos
app.use('/datetime' , dateTimeSystem);

date-time.js

// meus códigos...
//...
//..

setInterval(atualizaDataHora, 1000);

function atualizaDataHora() {
    // meus outros códigos...
}

When I access the route to the time date page, this continuous update is correct and can stay indefinitely while I am on the page. However, when going to any other route/page, I need this "updatedDataHora" function to stop running one at a time, as I no longer need it. I checked in debug mode that it continues to run even after I switch to another page.

How do I interrupt the setInterval in this case?

Answer 1

"I’m not talking about just taking back the setInterval and running a clearInterval. That’s not it..."

I think that’s exactly what it is. The "return" of the setInterval is a pointer to call the clearInterval that cancels it. This is the only way to stop setInterval.

Another way that you can use, but that does not stop, is to have a flag in the function that gives Return early if it is no longer necessary, but to stop even with:

pointer = setInterval(updateDataHora, 1000);

function atualizaDataHora() {
    // meus outros códigos...

    // e quando já não for mais preciso:
    clearInterval(ponteiro);
}