We can't get the value returned by setInterval () in javascript, but we still want to get rid of it, so how to get there?

var I = setInterval () this function we call him when we return an I is his id
when this method is encapsulated in a certain block we can not get this I, then do we have a way to clear this timer
if there is no way to clear this setInterval alone, is there a way to clear all the current setInterval timers?

Javascript
Apr.27,2021

1: when encapsulating, you can use the timer id as part of the return value, and then clear
2 through clearInterval: encapsulate the method that adds the cleared operation

then you encapsulate a clearInterval method to the same place and call it when you want to clear it.

it is recommended to encapsulate a mySetInterval, to facilitate operation 

function mySetInterval(func, delay) {
   const id = setInterval(func, delay);
   return () => clearInterval(id);
}
const cancel = mySetInterval(func, delay);
cancel();

add a method to your module to clear the timer, and you can call

outside the module. 
function destory(){
    //...Interval
}
function timer() {
  var timeout;
  ...
  var timered = function(){
    timeout = setInterval(function() {
      ...
    })
  }
  timered.cancel = function() {
    clearInterval(timeout)
    timeout = null
  }
  return timered
}

because when the previously written setInterval is cleared with clearInterval, the timeout returned by setInterval will be lost. When I do this, I put the timeout push returned by setInterval into the arr array, and determine whether the arr.length is greater than zero before each re-call of setInterval, and call the clearInterval cleanup timer if it is greater than zero.

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