배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

export default {
  methods: {
    handleScroll (event) {
      // Any code to be executed when the window is scrolled
    }
  },
  created () {
    window.addEventListener('scroll', this.handleScroll);
  },
  destroyed () {
    window.removeEventListener('scroll', this.handleScroll);
  }
}

[출처] https://stackoverflow.com/questions/45822150/how-to-listen-to-the-window-scroll-event-in-a-vuejs-component