I have two events, let’s call them a and b.

b is always triggered when a is triggered but

when b is triggered, a is not guranteed to trigger.

How do I make it so that when a is triggered, b doesn’t happen?

el.addEventListener('a', async (event) => {
  doSomething();
});
el.addEventListener('b', async (event) => {
  doSomething();
});