How can I implement scroll triggers in Vue 3?

How can I implement scroll triggers in Vue 3?

You can use the Intersection Observer API to create scroll triggers in Vue 3. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

<template>
  <div ref="trigger" class="scroll-trigger">
    Scroll to see me change!
  </div>
</template>

<script>
export default {
  mounted() {
    const observer = new IntersectionObserver(entries => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          entry.target.classList.add('active');
        } else {
          entry.target.classList.remove('active');
        }
      });
    });
    observer.observe(this.$refs.trigger);
  }
};
</script>

This will add an 'active' class when the element is in view.

What styles should I add for the 'active' class?

You can add styles like this:

.scroll-trigger {
  opacity: 0;
  transition: opacity 0.5s;
}
.scroll-trigger.active {
  opacity: 1;
}

This will fade in the element when it becomes visible.

Thanks! How can I customize the scroll trigger threshold?

You can customize the threshold by passing an options object to the IntersectionObserver constructor. For example:

const options = {
  root: null,
  rootMargin: '0px',
  threshold: 0.5 // Trigger when 50% of the element is visible
};
const observer = new IntersectionObserver(callback, options);

This allows you to control when the trigger activates.