Can I use 'Trigger Email ' extension of Firebase without a "from" email address?

Question

I have a domain, but I don't have Email address yet.

I want to use 'Trigger Email' of Firebase for my domain only, is that possible? There is an item called 'Default FROM address' in the setting of 'Trigger Email', I think that an email address is necessary.

Does anyone know how to set up 'Trigger Email' without an email address?

Answer 1

You can use interception observer so when the target element with said class is in view, it triggers the callback to hide the button.

Example: The code might not be exact but it is meant to point in the direction to follow.

let options = {
    root: document.querySelector('.go-top'),
    rootMargin: '0px',
    threshold: 1.0
 }
let prevRatio = 0.0;
let observer = new IntersectionObserver(callback, options);

let target = document.querySelector('#back-to-top-button');
observer.observe(target);

function handleIntersect(entries, observer) {
  entries.forEach((entry) => {
    if (entry.intersectionRatio > prevRatio) {
      entry.target.style.display = "none";
    } else {
      entry.target.style.backgroundColor = "block";
    }

    prevRatio = entry.intersectionRatio;
  });
}

Let me know how it goes...

You can switch the root to null but this makes the button disappear as soon as the element with the class is in the viewport