JS垃圾收集器-删除对象时清除计时器

Question

I have a problem with timers. I know that if I set obj = nul; or delete object delete obj; it will removed from memory. But it not works if I have interval in my object. delete and obj = null; not working. How to delete a timers without doing this in the deleted object.

I think Angular4 clear only those timers from component that will be removed. Background timers not remove.

function MyFunc() {
  setInterval(function () {
    console.log('Interval');
  }, 1000);
}

var obj = new(MyFunc.bind({
  message: 'some_message'
}));

// From some time remove object
setTimeout(function() {
  delete obj;
  console.log('Delete object');
}, 5000);

Sorry for english.

---

Answer 1

Seems there is no way to do this automatically. You need to clear the interval manually. You might define a class like this:

class TimerTask {
  constructor(time){
    this.id = setTimeout(() => this.run(), time);
  }

 run(){ /* override that in subclasses */ }

  clear(){
    clearTimeout(this.id);
  }
}

So one can do:

class Log extends TimerTask {
  run(){
    console.log("done");
  }
}

const test = new Log(1000);

Then somewhen:

test = test.clear();