Watch window.scrollY changes in Vuejs

Question

I have a very simple app, that has 2 components: the App.vue and another component, Home.vue where I hold the rest of the structure of the app: a stick

Answer 1

For me none of the above worked.

I had to pass true as 3rd parameter in add/remove scroll listener:

mounted() {
  window.addEventListener("scroll", this.onScroll, true)
},
beforeDestroy() {
  window.removeEventListener("scroll", this.onScroll, true)
},
methods: {
  onScroll(e) {
    this.windowTop = e.target.scrollTop;
  }
}

3rd parameter: You should be able to attach a document-level listener with a third parameter of true to capture the scroll events on all elements. Here's what that looks like:

document.addEventListener('scroll', function(e){ }, true);

The true at the end is the important part, it tells the browser to capture the event on dispatch, even if that event does not normally bubble, like change, focus, and scroll.